The text of this chapter is extracted from the 2015 edition of the International Fuel Gas Code and has been modified where necessary to conform to the scope of application of the International Residential Code for One- and Two-Family Dwellings. The
section numbers appearing in parentheses after each section number are the section numbers of the corresponding text in the
International Fuel Gas Code.
This chapter covers those fuel
gas piping systems, fuel-gas appliances and related accessories,
venting systems and combustion air configurations most
commonly encountered in the construction of one- and two-family
dwellings and structures regulated by this code.
Coverage of piping systems shall extend from the point of delivery to the outlet of the appliance shutoff valves (see definition of "Point of delivery"). Piping systems requirements shall include design, materials, components, fabrication, assembly, installation, testing, inspection, operation and maintenance. Requirements for gas appliances and related accessories shall include installation, combustion and ventilation air and venting and connections to piping systems.
The omission from this chapter of any material or method of installation provided for in the International Fuel Gas Code shall not be construed as prohibiting the use of such material or method of installation. Fuel-gas piping systems, fuel-gas appliances and related accessories, venting systems and combustion air configurations not specifically covered in these chapters shall comply with the applicable provisions of the International Fuel Gas Code.
Gaseous hydrogen systems shall be regulated by Chapter 7 of the International Fuel Gas Code.
This chapter shall not apply to the following:
Coverage of piping systems shall extend from the point of delivery to the outlet of the appliance shutoff valves (see definition of "Point of delivery"). Piping systems requirements shall include design, materials, components, fabrication, assembly, installation, testing, inspection, operation and maintenance. Requirements for gas appliances and related accessories shall include installation, combustion and ventilation air and venting and connections to piping systems.
The omission from this chapter of any material or method of installation provided for in the International Fuel Gas Code shall not be construed as prohibiting the use of such material or method of installation. Fuel-gas piping systems, fuel-gas appliances and related accessories, venting systems and combustion air configurations not specifically covered in these chapters shall comply with the applicable provisions of the International Fuel Gas Code.
Gaseous hydrogen systems shall be regulated by Chapter 7 of the International Fuel Gas Code.
This chapter shall not apply to the following:
- Liquified natural gas (LNG) installations.
- Temporary LP-gas piping for buildings under construction or renovation that is not to become part of the permanent piping system.
- Except as provided in Section G2412.1.1, gas piping, meters, gas pressure regulators, and other appurtenances used by the serving gas supplier in the distribution of gas, other than undiluted LP-gas.
- Portable LP-gas appliances and equipment of all types that is not connected to a fixed fuel piping system.
- Portable fuel cell appliances that are neither connected to a fixed piping system nor interconnected to a power grid.
- Installation of hydrogen gas, LP-gas and compressed natural gas (CNG) systems on vehicles.
Unless otherwise expressly stated,
the following words and terms shall, for the purposes of this
chapter, have the meanings indicated in this chapter.
Words used in the
present tense include the future; words in the masculine gender
include the feminine and neuter; the singular number
includes the plural and the plural, the singular.
Where terms are not
defined in the code and are defined in the Michigan electrical
code, R 408.30801 to R 408.30880, Michigan building code,
R 408.30401 to R 408.30547, International Fire Code and
International Fuel Gas Code listed in Chapter 44, Michigan
mechanical code, R 408.30901 to R 408.30998 or Michigan
plumbing code, R 408.30701 to R 408.30796, the terms shall
have the meanings ascribed to them as in those codes.
R 408.30528
R 408.30528
ACCESS (TO). That which enables a device, appliance or
equipment to be reached by ready access or by a means that
first requires the removal or movement of a panel, door or
similar obstruction (see also "Ready access").
AIR CONDITIONER, GAS-FIRED. A gas-burning, automatically operated appliance for supplying cooled and/or dehumidified air or chilled liquid.
AIR CONDITIONING. The treatment of air so as to control simultaneously the temperature, humidity, cleanness and distribution of the air to meet the requirements of a conditioned space.
AIR, EXHAUST. Air being removed from any space or piece of equipment or appliance and conveyed directly to the atmosphere by means of openings or ducts.
AIR-HANDLING UNIT. A blower or fan used for the purpose of distributing supply air to a room, space or area.
AIR, MAKEUP. Any combination of outdoor and transfer air intended to replace exhaust air and exfiltration.
ALTERATION. A change in a system that involves an extension, addition or change to the arrangement, type or purpose of the original installation.
ANODELESS RISER. A transition assembly in which plastic piping is installed and terminated above ground outside of a building.
APPLIANCE. Any apparatus or device that utilizes a fuel or raw material to produce light, heat, power, refrigeration or air conditioning.
APPLIANCE, AUTOMATICALLY CONTROLLED. Appliances equipped with an automatic burner ignition and safety shut-off device and other automatic devices, which accomplish complete tum-on and shut-off of the gas to the main burner or burners, and graduate the gas supply to the burner or burners, but do not affect complete shut-off of the gas.
APPLIANCE, FAN-ASSISTED COMBUSTION. An appliance equipped with an integral mechanical means to either draw or force products of combustion through the combustion chamber or heat exchanger.
APPLIANCE, UNVENTED. An appliance designed or installed in such a manner that the products of combustion are not conveyed by a vent or chimney directly to the outside atmosphere.
APPLIANCE, VENTED. An appliance designed and installed in such a manner that all of the products of combustion are conveyed directly from the appliance to the outside atmosphere through an approved chimney or vent system.
APPROVED. Acceptable to the code official.
APPROVED AGENCY. An established and recognized agency that is regularly engaged in conducting tests or furnishing inspection services, where such agency has been approved by the code official.
ATMOSPHERIC PRESSURE. The pressure of the weight of air and water vapor on the surface of the earth, approximately 14.7 pounds per square inch (psia) (101 kPa absolute) at sea level.
AUTOMATIC IGNITION. Ignition of gas at the burner(s) when the gas controlling device is turned on, including reignition if the flames on the burner(s) have been extinguished by means other than by the closing of the gas controlling device.
BAROMETRIC DRAFT REGULATOR. A balanced damper device attached to a chimney, vent connector, breeching or flue gas manifold to protect combustion appliances by controlling chimney draft. A double-acting barometric draft regulator is one whose balancing damper is free to move in either direction to protect combustion appliances from both excessive draft and backdraft.
BOILER, LOW-PRESSURE. A self-contained appliance for supplying steam or hot water.
BONDING JUMPER. A conductor installed to electrically connect metallic gas piping to the grounding electrode system.
BRAZING. A metal-joining process wherein coalescence is produced by the use of a nonferrous filler metal having a melting point above 1,000°F (538°C), but lower than that of the base metal being joined. The filler material is distributed between the closely fitted surfaces of the joint by capillary action.
BTU. Abbreviation for British thermal unit, which is the quantity of heat required to raise the temperature of 1 pound (454 g) of water 1°F (0.56°C) (1 Btu = 1055 J).
BURNER. A device for the final conveyance of the gas, or a mixture of gas and air, to the combustion zone.
CHIMNEY. A primarily vertical structure containing one or more flues, for the purpose of carrying gaseous products of combustion and air from an appliance to the outside atmosphere.
CLEARANCE. The minimum distance through air measured between the heat-producing surface of the mechanical appliance, device or equipment and the surface of the combustible material or assembly.
CLOTHES DRYER. An appliance used to dry wet laundry by means of heated air.
CODE. These regulations, subsequent amendments thereto, or any emergency rule or regulation that the administrative authority having jurisdiction has lawfully adopted.
CODE OFFICIAL. The officer or other designated authority charged with the administration and enforcement of this code, or a duly authorized representative.
COMBUSTIBLE ASSEMBLY. Wall, floor, ceiling or other assembly constructed of one or more component materials that are not defined as noncombustible.
COMBUSTIBLE MATERIAL. Any material not defined as noncombustible.
COMBUSTION. In the context of this code, refers to the rapid oxidation of fuel accompanied by the production of heat or heat and light.
COMBUSTION AIR. Air necessary for complete combustion of a fuel, including theoretical air and excess air.
COMBUSTION CHAMBER. The portion of an appliance within which combustion occurs.
COMBUSTION PRODUCTS. Constituents resulting from the combustion of a fuel with the oxygen of the air, including the inert gases, but excluding excess air.
CONCEALED LOCATION. A location that cannot be accessed without damaging permanent parts of the building structure or finish surface. Spaces above, below or behind readily removable panels or doors shall not be considered as concealed.
CONCEALED PIPING. Piping that is located in a concealed location (see "Concealed location").
CONDENSATE. The liquid that condenses from a gas (including flue gas) caused by a reduction in temperature or increase in pressure.
CONNECTOR, APPLIANCE (Fuel). Rigid metallic pipe and fittings, semirigid metallic tubing and fittings or a listed and labeled device that connects an appliance to the gas piping system.
CONNECTOR, CHIMNEY OR VENT. The pipe that connects an appliance to a chimney or vent.
CONTROL. A manual or automatic device designed to regulate the gas, air, water or electrical supply to, or operation of, a mechanical system.
CONVERSION BURNER. A unit consisting of a burner and its controls for installation in an appliance originally utilizing another fuel.
CUBIC FOOT. The amount of gas that occupies 1 cubic foot (0.02832 m3) when at a temperature of 60°F (16°C), saturated with water vapor and under a pressure equivalent to that of 30 inches of mercury (101 kPa).
DAMPER. A manually or automatically controlled device to regulate draft or the rate of flow of air or combustion gases.
DECORATIVE APPLIANCE, VENTED. A vented appliance wherein the primary function lies in the aesthetic effect of the flames.
DECORATIVE APPLIANCES FOR INSTALLATION IN VENTED FIREPLACES. A vented appliance designed for installation within the fire chamber of a vented fireplace, wherein the primary function lies in the aesthetic effect of the flames.
DEMAND. The maximum amount of gas input required per unit of time, usually expressed in cubic feet per hour, or Btu/h (1 Btu/h = 0.2931 W).
DESIGN FLOOD ELEVATION. The elevation of the "design flood," including wave height, relative to the datum specified on the community's legally designated flood hazard map. In areas designated as Zone AO, the design flood elevation shall be the elevation of the highest existing grade of the building's perimeter plus the depth number, in feet, specified on the flood hazard map. In areas designated as Zone AO where a depth number is not specified on the map, the depth number shall be taken as being equal to 2 feet (610 mm).
DILUTION AIR. Air that is introduced into a draft hood and is mixed with the flue gases.
DIRECT-VENT APPLIANCES. Appliances that are constructed and installed so that all air for combustion is derived directly from the outside atmosphere and all flue gases are discharged directly to the outside atmosphere.
DRAFT. The pressure difference existing between the appliance or any component part and the atmosphere, that causes a continuous flow of air and products of combustion through the gas passages of the appliance to the atmosphere.
DRAFT HOOD. A nonadjustable device built into an appliance, or made as part of the vent connector from an appliance, that is designed to (1) provide for ready escape of the flue gases from the appliance in the event of no draft, back-draft, or stoppage beyond the draft hood, (2) prevent a back-draft from entering the appliance, and (3) neutralize the effect of stack action of the chimney or gas vent upon operation of the appliance.
DRAFT REGULATOR. A device that functions to maintain a desired draft in the appliance by automatically reducing the draft to the desired value.
DRIP. The container placed at a low point in a system of piping to collect condensate and from which the condensate is removable.
DUCT FURNACE. A warm-air furnace normally installed in an air-distribution duct to supply warm air for heating. This definition shall apply only to a warm-air heating appliance that depends for air circulation on a blower not furnished as part of the furnace.
DWELLING UNIT. A single unit providing complete, independent living facilities for one or more persons, including permanent provisions for living, sleeping, eating, cooking and sanitation.
EQUIPMENT. Apparatus and devices other than appliances.
EXCESS FLOW VALVE (EFV). A valve designed to activate when the fuel gas passing through it exceeds a prescribed flow rate.
EXTERIOR MASONRY CHIMNEYS. Masonry chimneys exposed to the outdoors on one or more sides below the roof line.
FIREPLACE. A fire chamber and hearth constructed of noncombustible material for use with solid fuels and provided with a chimney.
FLAME SAFEGUARD. A device that will automatically shut off the fuel supply to a main burner or group of burners when the means of ignition of such burners becomes inoperative, and when flame failure occurs on the burner or group of burners.
FLASHBACK ARRESTOR CHECK VALVE. A device that will prevent the backflow of one gas into the supply system of another gas and prevent the passage of flame into the gas supply system.
FLOOD HAZARD AREA. The greater of the following two areas:
FLOOR FURNACE. A completely self-contained furnace suspended from the floor of the space being heated, taking air for combustion from outside such space and with means for observing flames and lighting the appliance from such space.
FLUE, APPLIANCE. The passage(s) within an appliance through which combustion products pass from the combustion chamber of the appliance to the draft hood inlet opening on an appliance equipped with a draft hood or to the outlet of the appliance on an appliance not equipped with a draft hood.
FLUE COLLAR. That portion of an appliance designed for the attachment of a draft hood, vent connector or venting system.
FLUE GASES. Products of combustion plus excess air in appliance flues or heat exchangers.
FLUE LINER (LINING). A system or material used to form the inside surface of a flue in a chimney or vent, for the purpose of protecting the surrounding structure from the effects of combustion products and for conveying combustion products without leakage to the atmosphere.
FUEL GAS. A natural gas, manufactured gas, liquefied petroleum gas or mixtures of these gases.
FURNACE. A completely self-contained heating unit that is designed to supply heated air to spaces remote from or adjacent to the appliance location.
FURNACE, CENTRAL. A self-contained appliance for heating air by transfer of heat of combustion through metal to the air, and designed to supply heated air through ducts to spaces remote from or adjacent to the appliance location.
FURNACE PLENUM. An air compartment or chamber to which one or more ducts are connected and which forms part of an air distribution system.
GAS CONVENIENCE OUTLET. A permanently mounted, manually operated device that provides the means for connecting an appliance to, and disconnecting an appliance from, the supply piping. The device includes an integral, manually operated valve with a nondisplaceable valve member and is designed so that disconnection of an appliance only occurs when the manually operated valve is in the closed position.
GAS PIPING. An installation of pipe, valves or fittings installed on a premises or in a building and utilized to convey fuel gas.
HAZARDOUS LOCATION. Any location considered to be a fire hazard for flammable vapors, dust, combustible fibers or other highly combustible substances. The location is not necessarily categorized in the International Building Code as a high-hazard use group classification.
HOUSE PIPING. See "Piping system."
IGNITION PILOT. A pilot that operates during the lighting cycle and discontinues during main burner operation.
IGNITION SOURCE. A flame spark or hot surface capable of igniting flammable vapors or fumes. Such sources include appliance burners, burner ignitors and electrical switching devices.
INFRARED RADIANT HEATER. A heater which directs a substantial amount of its energy output in the form of infrared radiant energy into the area to be heated. Such heaters are of either the vented or unvented type.
JOINT, FLARED. A metal-to-metal compression joint in which a conical spread is made on the end of a tube that is compressed by a flare nut against a mating flare.
JOINT, MECHANICAL. A general form of gas-tight joints obtained by the joining of metal parts through a positiveholding mechanical construction, such as press joint, flanged joint, threaded joint, flared joint or compression joint.
JOINT, PLASTIC ADHESIVE. A joint made in thermoset plastic piping by the use of an adhesive substance which forms a continuous bond between the mating surfaces without dissolving either one of them.
LABELED. Equipment, materials or products to which have been affixed a label, seal, symbol or other identifying mark of a nationally recognized testing laboratory, inspection agency or other organization concerned with product evaluation that maintains periodic inspection of the production of the above-labeled items and whose labeling indicates either that the equipment, material or product meets identified standards or has been tested and found suitable for a specified purpose.
LEAK CHECK. An operation performed on a gas piping system to verify that the system does not leak.
LIQUEFIED PETROLEUM GAS or LPG (LP-GAS). Liquefied petroleum gas composed predominately of propane, propylene, butanes or butylenes, or mixtures thereof that is gaseous under normal atmospheric conditions, but is capable of being liquefied under moderate pressure at normal temperatures.
LISTED. Equipment, materials, products or services included in a list published by an organization acceptable to the code official and concerned with evaluation of products or services that maintains periodic inspection of production of listed equipment or materials or periodic evaluation of services and whose listing states either that the equipment, material, product or service meets identified standards or has been tested and found suitable for a specified purpose.
LIVING SPACE. Space within a dwelling unit utilized for living, sleeping, eating, cooking, bathing, washing and sanitation purposes.
LOG LIGHTER. A manually operated solid-fuel ignition appliance for installation in a vented solid-fuel-burning fireplace.
MAIN BURNER. A device or group of devices essentially forming an integral unit for the final conveyance of gas or a mixture of gas and air to the combustion zone, and on which combustion takes place to accomplish the function for which the appliance is designed.
METER. The instrument installed to measure the volume of gas delivered through it.
MODULATING. Modulating or throttling is the action of a control from its maximum to minimum position in either predetermined steps or increments of movement as caused by its actuating medium.
NONCOMBUSTIBLE MATERIALS. Materials that, when tested in accordance with ASTM E136, have at least three of four specimens tested meeting all of the following criteria:
OFFSET (VENT). A combination of approved bends that make two changes in direction bringing one section of the vent out of line, but into a line parallel with the other section.
OUTLET. The point at which a gas-fired appliance connects to the gas piping system.
OXYGEN DEPLETION SAFETY SHUTOFF SYSTEM (ODS). A system designed to act to shut off the gas supply to the main and pilot burners if the oxygen in the surrounding atmosphere is reduced below a predetermined level.
PILOT. A small flame that is utilized to ignite the gas at the main burner or burners.
PIPING. Where used in this code, "piping" refers to either pipe or tubing, or both.
PIPING SYSTEM. All fuel piping, valves and fittings from the outlet of the point of delivery to the outlets of the appliance shutoff valves.
PLASTIC, THERMOPLASTIC. A plastic that is capable of being repeatedly softened by increase of temperature and hardened by decrease of temperature.
POINT OF DELIVERY. For natural gas systems, the point of delivery is the outlet of the service meter assembly or the outlet of the service regulator or service shutoff valve where a meter is not provided. Where a valve is provided at the outlet of the service meter assembly, such valve shall be considered to be downstream of the point of delivery. For undiluted liquefied petroleum gas systems, the point of delivery shall be considered to be the outlet of the service pressure regulator, exclusive of line gas regulators, in the system.
PRESSURE DROP. The loss in pressure due to friction or obstruction in pipes, valves, fittings, regulators and burners.
PRESSURE TEST. An operation performed to verify the gas-tight integrity of gas piping following its installation or modification.
PURGE. To free a gas conduit of air or gas, or a mixture of gas and air.
READY ACCESS (TO). That which enables a device, appliance or equipment to be directly reached, without requiring the removal or movement of any panel, door or similar obstruction. (See "Access.")
REGULATOR. A device for controlling and maintaining a uniform gas supply pressure, either pounds-to-inches water column (MP regulator) or inches-to-inches water column (appliance regulator).
REGULA TOR, GAS APPLIANCE. A pressure regulator for controlling pressure to the manifold of the gas appliance.
REGULA TOR, LINE GAS PRESSURE. A device placed in a gas line between the service pressure regulator and the appliance for controlling, maintaining or reducing the pressure in that portion of the piping system downstream of the device.
REGULATOR, MEDIUM-PRESSURE (MP Regulator). A line pressure regulator that reduces gas pressure from the range of greater than 0.5 psig (3.4 kPa) and less than or equal to 5 psig (34.5 kPa) to a lower pressure.
REGULATOR, PRESSURE. A device placed in a gas line for reducing, controlling and maintaining the pressure in that portion of the piping system downstream of the device.
REGULATOR, SERVICE PRESSURE. For natural gas systems, a device installed by the serving gas supplier to reduce and limit the service line pressure to delivery pressure. For undiluted liquefied petroleum gas systems, the regulator located upstream from all line gas pressure regulators, where installed, and downstream from any first stage or a high pressure regulator in the system.
RELIEF OPENING. The opening provided in a draft hood to permit the ready escape to the atmosphere of the flue products from the draft hood in the event of no draft, backdraft or stoppage beyond the draft hood, and to permit air into the draft hood in the event of a strong chimney updraft.
RELIEF VALVE (DEVICE). A safety valve designed to forestall the development of a dangerous condition by relieving either pressure, temperature or vacuum in the hot water supply system.
RELIEF VALVE, PRESSURE. An automatic valve that opens and closes a relief vent, depending on whether the pressure is above or below a predetermined value.
RELIEF VALVE, TEMPERATURE.
RELIEF VALVE, VACUUM. A valve that automatically opens and closes a vent for relieving a vacuum within the hot water supply system, depending on whether the vacuum is above or below a predetermined value.
RISER, GAS. A vertical pipe supplying fuel gas.
ROOM HEATER, UNVENTED. See "Unvented room heater."
ROOM HEATER, VENTED. A free-standing heating unit used for direct heating of the space in and adjacent to that in which the unit is located. (See also "Vented room heater.")
SAFETY SHUTOFF DEVICE. See "Flame safeguard."
SHAFT. An enclosed space extending through one or more stories of a building, connecting vertical openings in successive floors, or floors and the roof.
SPECIFIC GRAVITY. As applied to gas, specific gravity is the ratio of the weight of a given volume to that of the same volume of air, both measured under the same condition.
THERMOSTAT.
THIRD-PARTY CERTIFICATION AGENCY. An approved agency operating a product or material certification system that incorporates initial product testing, assessment and surveillance of a manufacturer's quality control system.
THIRD-PARTY CERTIFIED. Certification obtained by the manufacturer indicating that the function and performance characteristics of a product or material have been determined by testing and ongoing surveillance by an approved third-party certification agency. Assertion of certification is in the form of identification in accordance with the requirements of the third-party certification agency.
THIRD-PARTY TESTED. Procedure by which an approved testing laboratory provides documentation that a product, material or system conforms to specified requirements.
TRANSITION FITTINGS, PLASTIC TO STEEL. An adapter for joining plastic pipe to steel pipe. The purpose of this fitting is to provide a permanent, pressure-tight connection between two materials that cannot be joined directly one to another.
UNIT HEATER.
UNVENTED ROOM HEATER. An unvented heating appliance designed for stationary installation and utilized to provide comfort heating. Such appliances provide radiant heat or convection heat by gravity or fan circulation directly from the heater and do not utilize ducts.
VALVE. A device used in piping to control the gas supply to any section of a system of piping or to an appliance
VENT. A pipe or other conduit composed of factory-made components, containing a passageway for conveying combustion products and air to the atmosphere, listed and labeled for use with a specific type or class of appliance.
VENT CONNECTOR. See "Connector."
VENT PIPING.
VENTED APPLIANCE CATEGORIES. Appliances that are categorized for the purpose of vent selection are classified into the following four categories:
VENTED ROOM HEATER. A vented self-contained, freestanding, nonrecessed appliance for furnishing warm air to the space in which it is installed, directly from the heater without duct connections.
VENTED WALL FURNACE. A self-contained vented appliance complete with grilles or equivalent, designed for incorporation in or permanent attachment to the structure of a building, mobile home or travel trailer, and furnishing heated air circulated by gravity or by a fan directly into the space to be heated through openings in the casing. This definition shall exclude floor furnaces, unit heaters and central furnaces as herein defined.
VENTING SYSTEM. A continuous open passageway from the flue collar or draft hood of an appliance to the outdoor atmosphere for the purpose of removing flue or vent gases. A venting system is usually composed of a vent or a chimney and vent connector, if used, assembled to form the open passageway.
WALL HEATER, UNVENTED TYPE. A room heater of the type designed for insertion in or attachment to a wall or partition. Such heater does not incorporate concealed venting arrangements in its construction and discharges all products of combustion through the front into the room being heated.
WATER HEATER. Any heating appliance or equipment that heats potable water and supplies such water to the potable hot water distribution system.
AIR CONDITIONER, GAS-FIRED. A gas-burning, automatically operated appliance for supplying cooled and/or dehumidified air or chilled liquid.
AIR CONDITIONING. The treatment of air so as to control simultaneously the temperature, humidity, cleanness and distribution of the air to meet the requirements of a conditioned space.
AIR, EXHAUST. Air being removed from any space or piece of equipment or appliance and conveyed directly to the atmosphere by means of openings or ducts.
AIR-HANDLING UNIT. A blower or fan used for the purpose of distributing supply air to a room, space or area.
AIR, MAKEUP. Any combination of outdoor and transfer air intended to replace exhaust air and exfiltration.
ALTERATION. A change in a system that involves an extension, addition or change to the arrangement, type or purpose of the original installation.
ANODELESS RISER. A transition assembly in which plastic piping is installed and terminated above ground outside of a building.
APPLIANCE. Any apparatus or device that utilizes a fuel or raw material to produce light, heat, power, refrigeration or air conditioning.
APPLIANCE, AUTOMATICALLY CONTROLLED. Appliances equipped with an automatic burner ignition and safety shut-off device and other automatic devices, which accomplish complete tum-on and shut-off of the gas to the main burner or burners, and graduate the gas supply to the burner or burners, but do not affect complete shut-off of the gas.
APPLIANCE, FAN-ASSISTED COMBUSTION. An appliance equipped with an integral mechanical means to either draw or force products of combustion through the combustion chamber or heat exchanger.
APPLIANCE, UNVENTED. An appliance designed or installed in such a manner that the products of combustion are not conveyed by a vent or chimney directly to the outside atmosphere.
APPLIANCE, VENTED. An appliance designed and installed in such a manner that all of the products of combustion are conveyed directly from the appliance to the outside atmosphere through an approved chimney or vent system.
APPROVED. Acceptable to the code official.
APPROVED AGENCY. An established and recognized agency that is regularly engaged in conducting tests or furnishing inspection services, where such agency has been approved by the code official.
ATMOSPHERIC PRESSURE. The pressure of the weight of air and water vapor on the surface of the earth, approximately 14.7 pounds per square inch (psia) (101 kPa absolute) at sea level.
AUTOMATIC IGNITION. Ignition of gas at the burner(s) when the gas controlling device is turned on, including reignition if the flames on the burner(s) have been extinguished by means other than by the closing of the gas controlling device.
BAROMETRIC DRAFT REGULATOR. A balanced damper device attached to a chimney, vent connector, breeching or flue gas manifold to protect combustion appliances by controlling chimney draft. A double-acting barometric draft regulator is one whose balancing damper is free to move in either direction to protect combustion appliances from both excessive draft and backdraft.
BOILER, LOW-PRESSURE. A self-contained appliance for supplying steam or hot water.
Hot water heating boiler. A boiler in which no steam is
generated, from which hot water is circulated for heating
purposes and then returned to the boiler, and that operates
at water pressures not exceeding 160 pounds per square inch gauge (psig) (1100 kPa gauge) and at water temperatures
not exceeding 250°F (121°C) at or near the boiler
outlet.
Hot water supply boiler. A boiler, completely filled with water, which furnishes hot water to be used externally to itself, and that operates at water pressures not exceeding 160 psig (1100 kPa gauge) and at water temperatures not exceeding 250°F (121°C) at or near the boiler outlet.
Steam heating boiler. A boiler in which steam is generated and that operates at a steam pressure not exceeding 15 psig (100 kPa gauge).
Hot water supply boiler. A boiler, completely filled with water, which furnishes hot water to be used externally to itself, and that operates at water pressures not exceeding 160 psig (1100 kPa gauge) and at water temperatures not exceeding 250°F (121°C) at or near the boiler outlet.
Steam heating boiler. A boiler in which steam is generated and that operates at a steam pressure not exceeding 15 psig (100 kPa gauge).
BONDING JUMPER. A conductor installed to electrically connect metallic gas piping to the grounding electrode system.
BRAZING. A metal-joining process wherein coalescence is produced by the use of a nonferrous filler metal having a melting point above 1,000°F (538°C), but lower than that of the base metal being joined. The filler material is distributed between the closely fitted surfaces of the joint by capillary action.
BTU. Abbreviation for British thermal unit, which is the quantity of heat required to raise the temperature of 1 pound (454 g) of water 1°F (0.56°C) (1 Btu = 1055 J).
BURNER. A device for the final conveyance of the gas, or a mixture of gas and air, to the combustion zone.
Induced-draft. A burner that depends on draft induced by
a fan that is an integral part of the appliance and is located
downstream from the burner.
Power. A burner in which gas, air or both are supplied at pressures exceeding, for gas, the line pressure, and for air, atmospheric pressure, with this added pressure being applied at the burner.
Power. A burner in which gas, air or both are supplied at pressures exceeding, for gas, the line pressure, and for air, atmospheric pressure, with this added pressure being applied at the burner.
CHIMNEY. A primarily vertical structure containing one or more flues, for the purpose of carrying gaseous products of combustion and air from an appliance to the outside atmosphere.
Factory-built chimney. A listed and labeled chimney
composed of factory-made components, assembled in the
field in accordance with manufacturer's instructions and
the conditions of the listing.
Masonry chimney. A field-constructed chimney composed of solid masonry units, bricks, stones or concrete.
Masonry chimney. A field-constructed chimney composed of solid masonry units, bricks, stones or concrete.
CLEARANCE. The minimum distance through air measured between the heat-producing surface of the mechanical appliance, device or equipment and the surface of the combustible material or assembly.
CLOTHES DRYER. An appliance used to dry wet laundry by means of heated air.
Type 1. Factory-built package, multiple production. Primarily
used in the family living environment. Usually the
smallest unit physically and in function output.
CODE. These regulations, subsequent amendments thereto, or any emergency rule or regulation that the administrative authority having jurisdiction has lawfully adopted.
CODE OFFICIAL. The officer or other designated authority charged with the administration and enforcement of this code, or a duly authorized representative.
COMBUSTIBLE ASSEMBLY. Wall, floor, ceiling or other assembly constructed of one or more component materials that are not defined as noncombustible.
COMBUSTIBLE MATERIAL. Any material not defined as noncombustible.
COMBUSTION. In the context of this code, refers to the rapid oxidation of fuel accompanied by the production of heat or heat and light.
COMBUSTION AIR. Air necessary for complete combustion of a fuel, including theoretical air and excess air.
COMBUSTION CHAMBER. The portion of an appliance within which combustion occurs.
COMBUSTION PRODUCTS. Constituents resulting from the combustion of a fuel with the oxygen of the air, including the inert gases, but excluding excess air.
CONCEALED LOCATION. A location that cannot be accessed without damaging permanent parts of the building structure or finish surface. Spaces above, below or behind readily removable panels or doors shall not be considered as concealed.
CONCEALED PIPING. Piping that is located in a concealed location (see "Concealed location").
CONDENSATE. The liquid that condenses from a gas (including flue gas) caused by a reduction in temperature or increase in pressure.
CONNECTOR, APPLIANCE (Fuel). Rigid metallic pipe and fittings, semirigid metallic tubing and fittings or a listed and labeled device that connects an appliance to the gas piping system.
CONNECTOR, CHIMNEY OR VENT. The pipe that connects an appliance to a chimney or vent.
CONTROL. A manual or automatic device designed to regulate the gas, air, water or electrical supply to, or operation of, a mechanical system.
CONVERSION BURNER. A unit consisting of a burner and its controls for installation in an appliance originally utilizing another fuel.
CUBIC FOOT. The amount of gas that occupies 1 cubic foot (0.02832 m3) when at a temperature of 60°F (16°C), saturated with water vapor and under a pressure equivalent to that of 30 inches of mercury (101 kPa).
DAMPER. A manually or automatically controlled device to regulate draft or the rate of flow of air or combustion gases.
DECORATIVE APPLIANCE, VENTED. A vented appliance wherein the primary function lies in the aesthetic effect of the flames.
DECORATIVE APPLIANCES FOR INSTALLATION IN VENTED FIREPLACES. A vented appliance designed for installation within the fire chamber of a vented fireplace, wherein the primary function lies in the aesthetic effect of the flames.
DEMAND. The maximum amount of gas input required per unit of time, usually expressed in cubic feet per hour, or Btu/h (1 Btu/h = 0.2931 W).
DESIGN FLOOD ELEVATION. The elevation of the "design flood," including wave height, relative to the datum specified on the community's legally designated flood hazard map. In areas designated as Zone AO, the design flood elevation shall be the elevation of the highest existing grade of the building's perimeter plus the depth number, in feet, specified on the flood hazard map. In areas designated as Zone AO where a depth number is not specified on the map, the depth number shall be taken as being equal to 2 feet (610 mm).
DILUTION AIR. Air that is introduced into a draft hood and is mixed with the flue gases.
DIRECT-VENT APPLIANCES. Appliances that are constructed and installed so that all air for combustion is derived directly from the outside atmosphere and all flue gases are discharged directly to the outside atmosphere.
DRAFT. The pressure difference existing between the appliance or any component part and the atmosphere, that causes a continuous flow of air and products of combustion through the gas passages of the appliance to the atmosphere.
Mechanical or induced draft. The pressure difference
created by the action of a fan, blower or ejector that is
located between the appliance and the chimney or vent
termination.
Natural draft. The pressure difference created by a vent or chimney because of its height, and the temperature difference between the flue gases and the atmosphere.
Natural draft. The pressure difference created by a vent or chimney because of its height, and the temperature difference between the flue gases and the atmosphere.
DRAFT HOOD. A nonadjustable device built into an appliance, or made as part of the vent connector from an appliance, that is designed to (1) provide for ready escape of the flue gases from the appliance in the event of no draft, back-draft, or stoppage beyond the draft hood, (2) prevent a back-draft from entering the appliance, and (3) neutralize the effect of stack action of the chimney or gas vent upon operation of the appliance.
DRAFT REGULATOR. A device that functions to maintain a desired draft in the appliance by automatically reducing the draft to the desired value.
DRIP. The container placed at a low point in a system of piping to collect condensate and from which the condensate is removable.
DUCT FURNACE. A warm-air furnace normally installed in an air-distribution duct to supply warm air for heating. This definition shall apply only to a warm-air heating appliance that depends for air circulation on a blower not furnished as part of the furnace.
DWELLING UNIT. A single unit providing complete, independent living facilities for one or more persons, including permanent provisions for living, sleeping, eating, cooking and sanitation.
EQUIPMENT. Apparatus and devices other than appliances.
EXCESS FLOW VALVE (EFV). A valve designed to activate when the fuel gas passing through it exceeds a prescribed flow rate.
EXTERIOR MASONRY CHIMNEYS. Masonry chimneys exposed to the outdoors on one or more sides below the roof line.
FIREPLACE. A fire chamber and hearth constructed of noncombustible material for use with solid fuels and provided with a chimney.
Factory-built fireplace. A fireplace composed of listed
factory-built components assembled in accordance with
the terms of listing to form the completed fireplace.
Masonry fireplace. A hearth and fire chamber of solid masonry units such as bricks, stones, listed masonry units or reinforced concrete, provided with a suitable chimney.
Masonry fireplace. A hearth and fire chamber of solid masonry units such as bricks, stones, listed masonry units or reinforced concrete, provided with a suitable chimney.
FLAME SAFEGUARD. A device that will automatically shut off the fuel supply to a main burner or group of burners when the means of ignition of such burners becomes inoperative, and when flame failure occurs on the burner or group of burners.
FLASHBACK ARRESTOR CHECK VALVE. A device that will prevent the backflow of one gas into the supply system of another gas and prevent the passage of flame into the gas supply system.
FLOOD HAZARD AREA. The greater of the following two areas:
- The area within a floodplain subject to a 1 percent or greater chance of flooding in any given year.
- This area designated as a flood hazard area on a community's flood hazard map, or otherwise legally designated.
FLOOR FURNACE. A completely self-contained furnace suspended from the floor of the space being heated, taking air for combustion from outside such space and with means for observing flames and lighting the appliance from such space.
FLUE, APPLIANCE. The passage(s) within an appliance through which combustion products pass from the combustion chamber of the appliance to the draft hood inlet opening on an appliance equipped with a draft hood or to the outlet of the appliance on an appliance not equipped with a draft hood.
FLUE COLLAR. That portion of an appliance designed for the attachment of a draft hood, vent connector or venting system.
FLUE GASES. Products of combustion plus excess air in appliance flues or heat exchangers.
FLUE LINER (LINING). A system or material used to form the inside surface of a flue in a chimney or vent, for the purpose of protecting the surrounding structure from the effects of combustion products and for conveying combustion products without leakage to the atmosphere.
FUEL GAS. A natural gas, manufactured gas, liquefied petroleum gas or mixtures of these gases.
FURNACE. A completely self-contained heating unit that is designed to supply heated air to spaces remote from or adjacent to the appliance location.
FURNACE, CENTRAL. A self-contained appliance for heating air by transfer of heat of combustion through metal to the air, and designed to supply heated air through ducts to spaces remote from or adjacent to the appliance location.
FURNACE PLENUM. An air compartment or chamber to which one or more ducts are connected and which forms part of an air distribution system.
GAS CONVENIENCE OUTLET. A permanently mounted, manually operated device that provides the means for connecting an appliance to, and disconnecting an appliance from, the supply piping. The device includes an integral, manually operated valve with a nondisplaceable valve member and is designed so that disconnection of an appliance only occurs when the manually operated valve is in the closed position.
GAS PIPING. An installation of pipe, valves or fittings installed on a premises or in a building and utilized to convey fuel gas.
HAZARDOUS LOCATION. Any location considered to be a fire hazard for flammable vapors, dust, combustible fibers or other highly combustible substances. The location is not necessarily categorized in the International Building Code as a high-hazard use group classification.
HOUSE PIPING. See "Piping system."
IGNITION PILOT. A pilot that operates during the lighting cycle and discontinues during main burner operation.
IGNITION SOURCE. A flame spark or hot surface capable of igniting flammable vapors or fumes. Such sources include appliance burners, burner ignitors and electrical switching devices.
INFRARED RADIANT HEATER. A heater which directs a substantial amount of its energy output in the form of infrared radiant energy into the area to be heated. Such heaters are of either the vented or unvented type.
JOINT, FLARED. A metal-to-metal compression joint in which a conical spread is made on the end of a tube that is compressed by a flare nut against a mating flare.
JOINT, MECHANICAL. A general form of gas-tight joints obtained by the joining of metal parts through a positiveholding mechanical construction, such as press joint, flanged joint, threaded joint, flared joint or compression joint.
JOINT, PLASTIC ADHESIVE. A joint made in thermoset plastic piping by the use of an adhesive substance which forms a continuous bond between the mating surfaces without dissolving either one of them.
LABELED. Equipment, materials or products to which have been affixed a label, seal, symbol or other identifying mark of a nationally recognized testing laboratory, inspection agency or other organization concerned with product evaluation that maintains periodic inspection of the production of the above-labeled items and whose labeling indicates either that the equipment, material or product meets identified standards or has been tested and found suitable for a specified purpose.
LEAK CHECK. An operation performed on a gas piping system to verify that the system does not leak.
LIQUEFIED PETROLEUM GAS or LPG (LP-GAS). Liquefied petroleum gas composed predominately of propane, propylene, butanes or butylenes, or mixtures thereof that is gaseous under normal atmospheric conditions, but is capable of being liquefied under moderate pressure at normal temperatures.
LISTED. Equipment, materials, products or services included in a list published by an organization acceptable to the code official and concerned with evaluation of products or services that maintains periodic inspection of production of listed equipment or materials or periodic evaluation of services and whose listing states either that the equipment, material, product or service meets identified standards or has been tested and found suitable for a specified purpose.
LIVING SPACE. Space within a dwelling unit utilized for living, sleeping, eating, cooking, bathing, washing and sanitation purposes.
LOG LIGHTER. A manually operated solid-fuel ignition appliance for installation in a vented solid-fuel-burning fireplace.
MAIN BURNER. A device or group of devices essentially forming an integral unit for the final conveyance of gas or a mixture of gas and air to the combustion zone, and on which combustion takes place to accomplish the function for which the appliance is designed.
METER. The instrument installed to measure the volume of gas delivered through it.
MODULATING. Modulating or throttling is the action of a control from its maximum to minimum position in either predetermined steps or increments of movement as caused by its actuating medium.
NONCOMBUSTIBLE MATERIALS. Materials that, when tested in accordance with ASTM E136, have at least three of four specimens tested meeting all of the following criteria:
- The recorded temperature of the surface and interior thermocouples shall not at any time during the test rise more than 54°F (30°C) above the furnace temperature at the beginning of the test.
- There shall not be flaming from the specimen after the first 30 seconds.
- If the weight loss of the specimen during testing exceeds 50 percent, the recorded temperature of the surface and interior thermocouples shall not at any time during the test rise above the furnace air temperature at the beginning of the test, and there shall not be flaming of the specimen.
OFFSET (VENT). A combination of approved bends that make two changes in direction bringing one section of the vent out of line, but into a line parallel with the other section.
OUTLET. The point at which a gas-fired appliance connects to the gas piping system.
OXYGEN DEPLETION SAFETY SHUTOFF SYSTEM (ODS). A system designed to act to shut off the gas supply to the main and pilot burners if the oxygen in the surrounding atmosphere is reduced below a predetermined level.
PILOT. A small flame that is utilized to ignite the gas at the main burner or burners.
PIPING. Where used in this code, "piping" refers to either pipe or tubing, or both.
Pipe. A rigid conduit of iron, steel, copper, brass or plastic.
Tubing. Semirigid conduit of copper, aluminum, plastic or steel.
Tubing. Semirigid conduit of copper, aluminum, plastic or steel.
PIPING SYSTEM. All fuel piping, valves and fittings from the outlet of the point of delivery to the outlets of the appliance shutoff valves.
PLASTIC, THERMOPLASTIC. A plastic that is capable of being repeatedly softened by increase of temperature and hardened by decrease of temperature.
POINT OF DELIVERY. For natural gas systems, the point of delivery is the outlet of the service meter assembly or the outlet of the service regulator or service shutoff valve where a meter is not provided. Where a valve is provided at the outlet of the service meter assembly, such valve shall be considered to be downstream of the point of delivery. For undiluted liquefied petroleum gas systems, the point of delivery shall be considered to be the outlet of the service pressure regulator, exclusive of line gas regulators, in the system.
PRESSURE DROP. The loss in pressure due to friction or obstruction in pipes, valves, fittings, regulators and burners.
PRESSURE TEST. An operation performed to verify the gas-tight integrity of gas piping following its installation or modification.
PURGE. To free a gas conduit of air or gas, or a mixture of gas and air.
READY ACCESS (TO). That which enables a device, appliance or equipment to be directly reached, without requiring the removal or movement of any panel, door or similar obstruction. (See "Access.")
REGULATOR. A device for controlling and maintaining a uniform gas supply pressure, either pounds-to-inches water column (MP regulator) or inches-to-inches water column (appliance regulator).
REGULA TOR, GAS APPLIANCE. A pressure regulator for controlling pressure to the manifold of the gas appliance.
REGULA TOR, LINE GAS PRESSURE. A device placed in a gas line between the service pressure regulator and the appliance for controlling, maintaining or reducing the pressure in that portion of the piping system downstream of the device.
REGULATOR, MEDIUM-PRESSURE (MP Regulator). A line pressure regulator that reduces gas pressure from the range of greater than 0.5 psig (3.4 kPa) and less than or equal to 5 psig (34.5 kPa) to a lower pressure.
REGULATOR, PRESSURE. A device placed in a gas line for reducing, controlling and maintaining the pressure in that portion of the piping system downstream of the device.
REGULATOR, SERVICE PRESSURE. For natural gas systems, a device installed by the serving gas supplier to reduce and limit the service line pressure to delivery pressure. For undiluted liquefied petroleum gas systems, the regulator located upstream from all line gas pressure regulators, where installed, and downstream from any first stage or a high pressure regulator in the system.
RELIEF OPENING. The opening provided in a draft hood to permit the ready escape to the atmosphere of the flue products from the draft hood in the event of no draft, backdraft or stoppage beyond the draft hood, and to permit air into the draft hood in the event of a strong chimney updraft.
RELIEF VALVE (DEVICE). A safety valve designed to forestall the development of a dangerous condition by relieving either pressure, temperature or vacuum in the hot water supply system.
RELIEF VALVE, PRESSURE. An automatic valve that opens and closes a relief vent, depending on whether the pressure is above or below a predetermined value.
RELIEF VALVE, TEMPERATURE.
Manual reset type. A valve that automatically opens a
relief vent at a predetermined temperature and that must be
manually returned to the closed position.
Reseating or self-closing type. An automatic valve that opens and closes a relief vent, depending on whether the temperature is above or below a predetermined value.
Reseating or self-closing type. An automatic valve that opens and closes a relief vent, depending on whether the temperature is above or below a predetermined value.
RELIEF VALVE, VACUUM. A valve that automatically opens and closes a vent for relieving a vacuum within the hot water supply system, depending on whether the vacuum is above or below a predetermined value.
RISER, GAS. A vertical pipe supplying fuel gas.
ROOM HEATER, UNVENTED. See "Unvented room heater."
ROOM HEATER, VENTED. A free-standing heating unit used for direct heating of the space in and adjacent to that in which the unit is located. (See also "Vented room heater.")
SAFETY SHUTOFF DEVICE. See "Flame safeguard."
SHAFT. An enclosed space extending through one or more stories of a building, connecting vertical openings in successive floors, or floors and the roof.
SPECIFIC GRAVITY. As applied to gas, specific gravity is the ratio of the weight of a given volume to that of the same volume of air, both measured under the same condition.
THERMOSTAT.
Electric switch type. A device that senses changes in temperature
and controls electrically, by means of separate
components, the flow of gas to the burner(s) to maintain
selected temperatures.
Integral gas valve type. An automatic device, actuated by temperature changes, designed to control the gas supply to the burner(s) in order to maintain temperatures between predetermined limits, and in which the thermal actuating element is an integral part of the device.
Integral gas valve type. An automatic device, actuated by temperature changes, designed to control the gas supply to the burner(s) in order to maintain temperatures between predetermined limits, and in which the thermal actuating element is an integral part of the device.
- Graduating thermostat. A thermostat in which the motion of the valve is approximately in direct proportion to the effective motion of the thermal element induced by temperature change.
- Snap-acting thermostat. A thermostat in which the thermostatic valve travels instantly from the closed to the open position, and vice versa.
THIRD-PARTY CERTIFICATION AGENCY. An approved agency operating a product or material certification system that incorporates initial product testing, assessment and surveillance of a manufacturer's quality control system.
THIRD-PARTY CERTIFIED. Certification obtained by the manufacturer indicating that the function and performance characteristics of a product or material have been determined by testing and ongoing surveillance by an approved third-party certification agency. Assertion of certification is in the form of identification in accordance with the requirements of the third-party certification agency.
THIRD-PARTY TESTED. Procedure by which an approved testing laboratory provides documentation that a product, material or system conforms to specified requirements.
TRANSITION FITTINGS, PLASTIC TO STEEL. An adapter for joining plastic pipe to steel pipe. The purpose of this fitting is to provide a permanent, pressure-tight connection between two materials that cannot be joined directly one to another.
UNIT HEATER.
High-static pressure type. A self-contained, automatically
controlled, vented appliance having integral means
for circulation of air against 0.2 inch w.c. (50 Pa) or
greater static pressure. Such appliance is equipped with
provisions for attaching an outlet air duct and, where the
appliance is for indoor installation remote from the space
to be heated, is also equipped with provisions for attaching
an inlet air duct.
Low-static pressure type. A self-contained, automatically controlled, vented appliance, intended for installation in the space to be heated without the use of ducts, having integral means for circulation of air. Such units are allowed to be equipped with louvers or face extensions made in accordance with the manufacturer's specifications.
Low-static pressure type. A self-contained, automatically controlled, vented appliance, intended for installation in the space to be heated without the use of ducts, having integral means for circulation of air. Such units are allowed to be equipped with louvers or face extensions made in accordance with the manufacturer's specifications.
UNVENTED ROOM HEATER. An unvented heating appliance designed for stationary installation and utilized to provide comfort heating. Such appliances provide radiant heat or convection heat by gravity or fan circulation directly from the heater and do not utilize ducts.
VALVE. A device used in piping to control the gas supply to any section of a system of piping or to an appliance
Appliance shutoff. A valve located in the piping system,
used to isolate individual appliances for purposes such as
service or replacement.
Automatic. An automatic or semiautomatic device consisting essentially of a valve and an operator that control the gas supply to the burner(s) during operation of an appliance. The operator shall be actuated by application of gas pressure on a flexible diaphragm, by electrical means, by mechanical means or by other approved means.
Automatic gas shutoff. A valve used in conjunction with an automatic gas shutoff device to shut off the gas supply to a water-heating system. It shall be constructed integrally with the gas shutoff device or shall be a separate assembly.
Individual main burner. A valve that controls the gas supply to an individual main burner.
Main burner control. A valve that controls the gas supply to the main burner manifold.
Manual main gas-control. A manually operated valve in the gas line for the purpose of completely turning on or shutting off the gas supply to the appliance, except to pilot or pilots that are provided with independent shutoff.
Manual reset. An automatic shutoff valve installed in the gas supply piping and set to shut off when unsafe conditions occur. The device remains closed until manually reopened.
Service shutoff. A valve, installed by the serving gas supplier between the service meter or source of supply and the customer piping system, to shut off the entire piping system.
Automatic. An automatic or semiautomatic device consisting essentially of a valve and an operator that control the gas supply to the burner(s) during operation of an appliance. The operator shall be actuated by application of gas pressure on a flexible diaphragm, by electrical means, by mechanical means or by other approved means.
Automatic gas shutoff. A valve used in conjunction with an automatic gas shutoff device to shut off the gas supply to a water-heating system. It shall be constructed integrally with the gas shutoff device or shall be a separate assembly.
Individual main burner. A valve that controls the gas supply to an individual main burner.
Main burner control. A valve that controls the gas supply to the main burner manifold.
Manual main gas-control. A manually operated valve in the gas line for the purpose of completely turning on or shutting off the gas supply to the appliance, except to pilot or pilots that are provided with independent shutoff.
Manual reset. An automatic shutoff valve installed in the gas supply piping and set to shut off when unsafe conditions occur. The device remains closed until manually reopened.
Service shutoff. A valve, installed by the serving gas supplier between the service meter or source of supply and the customer piping system, to shut off the entire piping system.
VENT. A pipe or other conduit composed of factory-made components, containing a passageway for conveying combustion products and air to the atmosphere, listed and labeled for use with a specific type or class of appliance.
Special gas vent. A vent listed and labeled for use with
listed Category II, III and IV gas appliances.
Type B vent. A vent listed and labeled for use with appliances with draft hoods and other Category I appliances that are listed for use with Type B vents.
Type BW vent. A vent listed and labeled for use with wall furnaces.
Type L vent. A vent listed and labeled for use with appliances that are listed for use with Type L or Type B vents.
Type B vent. A vent listed and labeled for use with appliances with draft hoods and other Category I appliances that are listed for use with Type B vents.
Type BW vent. A vent listed and labeled for use with wall furnaces.
Type L vent. A vent listed and labeled for use with appliances that are listed for use with Type L or Type B vents.
VENT CONNECTOR. See "Connector."
VENT PIPING.
Breather. Piping run from a pressure-regulating device to
the outdoors, designed to provide a reference to atmospheric
pressure. If the device incorporates an integral
pressure relief mechanism, a breather vent can also serve
as a relief vent.
Relief. Piping run from a pressure-regulating or pressurelimiting device to the outdoors, designed to provide for the safe venting of gas in the event of excessive pressure in the gas piping system.
Relief. Piping run from a pressure-regulating or pressurelimiting device to the outdoors, designed to provide for the safe venting of gas in the event of excessive pressure in the gas piping system.
VENTED APPLIANCE CATEGORIES. Appliances that are categorized for the purpose of vent selection are classified into the following four categories:
Category I. An appliance that operates with a nonpositive
vent static pressure and with a vent gas temperature that
avoids excessive condensate production in the vent.
Category II. An appliance that operates with a nonpositive vent static pressure and with a vent gas temperature that is capable of causing excessive condensate production in the vent.
Category III. An appliance that operates with a positive vent static pressure and with a vent gas temperature that avoids excessive condensate production in the vent.
Category IV. An appliance that operates with a positive vent static pressure and with a vent gas temperature that is capable of causing excessive condensate production in the vent.
Category II. An appliance that operates with a nonpositive vent static pressure and with a vent gas temperature that is capable of causing excessive condensate production in the vent.
Category III. An appliance that operates with a positive vent static pressure and with a vent gas temperature that avoids excessive condensate production in the vent.
Category IV. An appliance that operates with a positive vent static pressure and with a vent gas temperature that is capable of causing excessive condensate production in the vent.
VENTED ROOM HEATER. A vented self-contained, freestanding, nonrecessed appliance for furnishing warm air to the space in which it is installed, directly from the heater without duct connections.
VENTED WALL FURNACE. A self-contained vented appliance complete with grilles or equivalent, designed for incorporation in or permanent attachment to the structure of a building, mobile home or travel trailer, and furnishing heated air circulated by gravity or by a fan directly into the space to be heated through openings in the casing. This definition shall exclude floor furnaces, unit heaters and central furnaces as herein defined.
VENTING SYSTEM. A continuous open passageway from the flue collar or draft hood of an appliance to the outdoor atmosphere for the purpose of removing flue or vent gases. A venting system is usually composed of a vent or a chimney and vent connector, if used, assembled to form the open passageway.
WALL HEATER, UNVENTED TYPE. A room heater of the type designed for insertion in or attachment to a wall or partition. Such heater does not incorporate concealed venting arrangements in its construction and discharges all products of combustion through the front into the room being heated.
WATER HEATER. Any heating appliance or equipment that heats potable water and supplies such water to the potable hot water distribution system.
This section shall govern the
approval and installation of all equipment and appliances that
comprise parts of the installations regulated by this code in
accordance with Section G2401.
The requirements for combustion
and dilution air for gas-fired appliances shall be governed
by Section G2407. The requirements for combustion
and dilution air for appliances operating with fuels other than
fuel gas shall be regulated by Chapter 17.
Appliances regulated
by this code shall be listed and labeled for the application in
which they are used unless otherwise approved in accordance
with Section R104.11. The approval of unlisted appliances in
accordance with Section R104.11 shall be based upon
approved engineering evaluation.
Defective material or parts shall be
replaced or repaired in such a manner so as to preserve the
original approval or listing.
Appliances and supports
that are exposed to wind shall be designed and installed to
resist the wind pressures determined in accordance with this code.
For structures located in
flood hazard areas, the appliance, equipment and system
installations regulated by this code shall be located at or
above the elevation required by Section R322 for utilities and
attendant equipment.
Exception: The appliance, equipment and system installations
regulated by this code are permitted to be located
below the elevation required by Section R322 for utilities
and attendant equipment provided that they are designed
and installed to prevent water from entering or accumulating
within the components and to resist hydrostatic and
hydrodynamic loads and stresses, including the effects of
buoyancy, during the occurrence of flooding to such elevation.
When earthquake
loads are applicable in accordance with this code, the supports
shall be designed and installed for the seismic forces in
accordance with this code.
Buildings or structures
and the walls enclosing habitable or occupiable rooms and
spaces in which persons live, sleep or work, or in which feed,
food or foodstuffs are stored, prepared, processed, served or
sold, shall be constructed to protect against the entry of
rodents.
Category IV condensing
appliances shall be provided with an auxiliary drain
pan where damage to any building component will occur as a
result of stoppage in the condensate drainage system. Such
pan shall be installed in accordance with the applicable provisions
of Section M1411.
Exception: An auxiliary drain pan shall not be required
for appliances that automatically shut down operation in
the event of a stoppage in the condensate drainage system.
Condensate pumps
located in uninhabitable spaces, such as attics and crawl
spaces, shall be connected to the appliance or equipment
served such that when the pump fails, the appliance or equipment
will be prevented from operating. Pumps shall be
installed in accordance with the manufacturer's instructions.
The building shall not be
weakened by the installation of any gas piping. In the process
of installing or repairing any gas piping, the finished floors,
walls, ceilings, tile work or any other part of the building or
premises which is required to be changed or replaced shall be
left in a safe structural condition in accordance with the
requirements of this code.
Truss members and
components shall not be cut, drilled, notched, spliced or otherwise
altered in any way without the written concurrence
and approval of a registered design professional. Alterations
resulting in the addition of loads to any member, such as
HVAC equipment and water heaters, shall not be permitted
without verification that the truss is capable of supporting
such additional loading.
Cuts,
notches and holes bored in trusses, structural composite lumber,
structural glued-laminated members and I-joists are prohibited
except where permitted by the manufacturer's
recommendations or where the effects of such alterations are
specifically considered in the design of the member by a registered
design professional.
Appliances shall be located as
required by this section, specific requirements elsewhere in
this code and the conditions of the equipment and appliance
listing.
Appliances shall not
be located in sleeping rooms, bathrooms, toilet rooms, storage
closets or surgical rooms, or in a space that opens only
into such rooms or spaces, except where the installation complies
with one of the following:
- The appliance is a direct-vent appliance installed in accordance with the conditions of the listing and the manufacturer's instructions.
- Vented room heaters, wall furnaces, vented decorative appliances, vented gas fireplaces, vented gas fireplace heaters and decorative appliances for installation in vented solid fuel-burning fireplaces are installed in rooms that meet the required volume criteria of Section G2407.5.
- A single wall-mounted unvented room heater is installed in a bathroom and such unvented room heater is equipped as specified in Section G2445.6 and has an input rating not greater than 6,000 Btu/h (1.76 kW). The bathroom shall meet the required volume criteria of Section G2407.5.
- A single wall-mounted unvented room heater is installed in a bedroom and such unvented room heater is equipped as specified in Section G2445.6 and has an input rating not greater than 10,000 Btu/h (2.93 kW). The bedroom shall meet the required volume criteria of Section G2407.5.
- The appliance is installed in a room or space that opens only into a bedroom or bathroom, and such room or space is used for no other purpose and is provided with a solid weather-stripped door equipped with an approved self-closing device. All combustion air shall be taken directly from the outdoors in accordance with Section G2407.6.
Appliances installed in
outdoor locations shall be either listed for outdoor installation
or provided with protection from outdoor environmental factors
that influence the operability, durability and safety of the
appliance.
Air for combustion, ventilation
and dilution of flue gases for appliances installed in buildings
shall be provided by application of one of the methods prescribed
in Sections G2407.5 through G2407.9. Where the
requirements of Section G2407.5 are not met, outdoor air
shall be introduced in accordance with one of the methods
prescribed in Sections G2407.6 through G2407.9. Direct-vent
appliances, gas appliances of other than natural draft design,
vented gas appliances not designated as Category I and appliances
equipped with power burners, shall be provided with
combustion, ventilation and dilution air in accordance with
the appliance manufacturer's instructions.
Exception: Type 1 clothes dryers that are provided with
makeup air in accordance with Section G2439.5.
Appliances shall be
located so as not to interfere with proper circulation of combustion, ventilation and dilution air.
Where
used, a draft hood or a barometric draft regulator shall be
installed in the same room or enclosure as the appliance
served to prevent any difference in pressure between the hood
or regulator and the combustion air supply.
Where exhaust fans,
clothes dryers and kitchen ventilation systems interfere with
the operation of appliances, makeup air shall be provided.
The required volume
of indoor air shall be determined in accordance with
Section G2407.5.1 or G2407.5.2, except that where the air
infiltration rate is known to be less than 0.40 air changes per
hour (ACH), Section G2407.5.2 shall be used. The total
required volume shall be the sum of the required volume calculated
for all appliances located within the space. Rooms
communicating directly with the space in which the appliances
are installed through openings not furnished with
doors, and through combustion air opening s sized and located in accordance with Section G2407.5.3, are considered to be
part of the required volume.
The minimum
required volume shall be 50 cubic feet per 1,000 Btu/h (4.8
m3/kW) of the appliance input rating.
Where the air infiltration rate of a structure is
known, the minimum required volume shall be determined
as follows:
For appliances other than fan-assisted, calculate volume using Equation 24-1.
(Equation 24-1)
For fan-assisted appliances, calculate volume using Equation 24-2.
(Equation 24-2)
where:
For purposes of this calculation, an infiltration rate greater than 0.60 ACH shall not be used in Equations 24-1 and 24-2.
For appliances other than fan-assisted, calculate volume using Equation 24-1.
(Equation 24-1)
For fan-assisted appliances, calculate volume using Equation 24-2.
(Equation 24-2)
where:
| Iother | = | All appliances other than fan assisted (input in Btu/h). |
| Ifan | = | Fan-assisted appliance (input in Btu/h). |
| ACH | = | Air change per hour (percent of volume of space exchanged per hour, expressed as a decimal). |
For purposes of this calculation, an infiltration rate greater than 0.60 ACH shall not be used in Equations 24-1 and 24-2.
Openings used to connect indoor spaces shall be sized and
located in accordance with Sections G2407.5.3.1 and
G2407.5.3.2 (see Figure G2407.5.3).
FIGURE G2407.5.3 (304.5.3)
ALL AIR FROM INSIDE THE BUILDING
(see Section G2407.5.3)
ALL AIR FROM INSIDE THE BUILDING
(see Section G2407.5.3)
Each opening shall have a minimum free area of 1
square inch per 1,000 Btu/h (2,200 mm2/k.W) of the total
input rating of all appliances in the space, but not less than
100 square inches (0.06 m2). One opening shall commence
within 12 inches (305 mm) of the top and one
opening shall commence within 12 inches (305 mm) of
the bottom of the enclosure. The minimum dimension of
air openings shall be not less than 3 inches (76 mm).
The volumes of spaces in different stories
shall be considered as communicating spaces where
such spaces are connected by one or more openings in
doors or floors having a total minimum free area of 2
square inches per 1,000 Btu/h (4402 mm2/kW) of total
input rating of all appliances.
Outdoor combustion
air shall be provided through opening(s) to the outdoors in
accordance with Section G2407.6.1 or G2407.6.2. The minimum
dimension of air openings shall be not less than 3 inches
(76 mm).
Two permanent openings, one commencing within 12 inches
(305 mm) of the top and one commencing within 12 inches
(305 mm) of the bottom of the enclosure, shall be provided.
The openings shall communicate directly or by ducts with
the outdoors or spaces that freely communicate with the outdoors.
Where directly communicating with the outdoors, or where communicating with the outdoors through vertical ducts, each opening shall have a minimum free area of 1 square inch per 4,000 Btu/h (550 mm2/kW) of total input rating of all appliances in the enclosure [see Figures G2407.6.1(1) and G2407.6.1(2)].
Where communicating with the outdoors through horizontal ducts, each opening shall have a minimum free area of not less than 1 square inch per 2,000 Btu/h (1,100 mm2/ kW) of total input rating of all appliances in the enclosure [see Figure G2407.6.1(3)].
FIGURE G2407.6.1(1) [304.6.1(1)]
ALL AIR FROM OUTDOORS-INLET AIR FROM VENTILATED CRAWL SPACE AND OUTLET AIR TO VENTILATED ATTIC
(see Section G2407.6.1)
For SI: 1 foot = 304.8 mm.
FIGURE G2407.6.1(2) [304.6.1(2)]
ALL AIR FROM OUTDOORS THROUGH VENTILATED ATTIC (see Section G2407.6.1)
FIGURE G2407.6.1(3) [304.6.1(3)]
ALL AIR FROM OUTDOORS (see Section G2407.6.1)
Where directly communicating with the outdoors, or where communicating with the outdoors through vertical ducts, each opening shall have a minimum free area of 1 square inch per 4,000 Btu/h (550 mm2/kW) of total input rating of all appliances in the enclosure [see Figures G2407.6.1(1) and G2407.6.1(2)].
Where communicating with the outdoors through horizontal ducts, each opening shall have a minimum free area of not less than 1 square inch per 2,000 Btu/h (1,100 mm2/ kW) of total input rating of all appliances in the enclosure [see Figure G2407.6.1(3)].
ALL AIR FROM OUTDOORS-INLET AIR FROM VENTILATED CRAWL SPACE AND OUTLET AIR TO VENTILATED ATTIC
(see Section G2407.6.1)
ALL AIR FROM OUTDOORS THROUGH VENTILATED ATTIC (see Section G2407.6.1)
ALL AIR FROM OUTDOORS (see Section G2407.6.1)
One permanent opening, commencing within 12 inches
(305 mm) of the top of the enclosure, shall be provided.
The appliance shall have clearances of at least 1 inch (25
mm) from the sides and back and 6 inches (152 mm) from
the front of the appliance. The opening shall directly communicate
with the outdoors or through a vertical or horizontal
duct to the outdoors, or spaces that freely
communicate with the outdoors (see Figure G2407.6.2)
and shall have a minimum free area of 1 square inch per
3,000 Btu/h (734 mm2/kW) of the total input rating of all
appliances located in the enclosure and not less than the
sum of the areas of all vent connectors in the space.
FIGURE G2407.6.2 (304.6.2)
SINGLE COMBUSTION AIR OPENING, ALL AIR FROM OUTDOORS
(see Section G2407.6.2)
SINGLE COMBUSTION AIR OPENING, ALL AIR FROM OUTDOORS
(see Section G2407.6.2)
The use of a combination of indoor and outdoor
combustion air shall be in accordance with Sections
G2407.7.1 through G2407.7.3.
Where used, openings
connecting the interior spaces shall comply with Section
G2407.5.3.
Outdoor
opening(s) shall be located in accordance with Section
G2407.6.
The outdoor
opening(s) size shall be calculated in accordance with
the following:
- The ratio of interior spaces shall be the available volume of all communicating spaces divided by the required volume.
- The outdoor size reduction factor shall be one minus the ratio of interior spaces.
- The minimum size of outdoor opening(s) shall be the full size of outdoor opening(s) calculated in accordance with Section G2407.6, multiplied by the reduction factor. The minimum dimension of air openings shall be not less than 3 inches (76 mm).
Engineered combustion
air installations shall provide an adequate supply of
combustion, ventilation and dilution air and shall be
approved.
Where all combustion air is provided by a mechanical air
supply system, the combustion air shall be supplied from the
outdoors at a rate not less than 0.35 cubic feet per minute per
1,000 Btu/h (0.034 m3/min per kW) of total input rating of all
appliances located within the space.
Where exhaust fans are
installed, makeup air shall be provided to replace the
exhausted air.
Each of the
appliances served shall be interlocked with the mechanical
air supply system to prevent main burner operation when
the mechanical air supply system is not in operation.
Where combustion air is provided by
the building's mechanical ventilation system, the system
shall provide the specified combustion air rate in addition
to the required ventilation air.
The required size of
openings for combustion, ventilation and dilution air shall be
based on the net free area of each opening. Where the free
area through a design of louver, grille or screen is known, it
shall be used in calculating the size opening required to provide
the free area specified. Where the design and free area of
louvers and grilles are not known, it shall be assumed that
wood louvers will have 25-percent free area and metal louvers
and grilles will have 75-percent free area. Screens shall
have a mesh size not smaller than ¼ inch (6.4 mm). Nonmotorized
louvers and grilles shall be fixed in the open position.
Motorized louvers shall be interlocked with the appliance so
that they are proven to be in the full open position prior to
main burner ignition and during main burner operation.
Means shall be provided to prevent the main burner from
igniting if the louvers fail to open during burner start-up and
to shut down the main burner if the louvers close during
operation.
Combustion air
ducts shall comply with all of the following:
- Ducts shall be constructed of galvanized steel complying
with Chapter 16 or of a material having equivalent
corrosion resistance, strength and rigidity.
Exception: Within dwellings units, unobstructed stud and joist spaces shall not be prohibited from conveying combustion air, provided that not more than one required fireblock is removed. - Ducts shall terminate in an unobstructed space allowing free movement of combustion air to the appliances.
- Ducts shall serve a single enclosure.
- Ducts shall not serve both upper and lower combustion air openings where both such openings are used. The separation between ducts serving upper and lower combustion air openings shall be maintained to the source of combustion air.
- Ducts shall not be screened where terminating in an attic space.
- Horizontal upper combustion air ducts shall not slope downward toward the source of combustion air.
- The remaining space surrounding a chimney liner, gas
vent, special gas vent or plastic piping installed within
a masonry, metal or factory-built chimney shall not be
used to supply combustion air.
Exception: Direct-vent gas-fired appliances designed for installation in a solid fuel-burning fireplace where installed in accordance with the manufacturer's instructions. - Combustion air intake openings located on the exterior of a building shall have the lowest side of such openings located not less than 12 inches (305 mm) vertically from the adjoining finished ground level.
Where corrosive or flammable process fumes or gases, other
than products of combustion, are present, means for the disposal
of such fumes or gases shall be provided. Such fumes or
gases include carbon monoxide, hydrogen sulfide, ammonia,
chlorine and halogenated hydrocarbons.
In barbershops, beauty shops and other facilities where chemicals that generate corrosive or flammable products, such as aerosol sprays, are routinely used, nondirect vent-type appliances shall be located in a mechanical room separated or partitioned off from other areas with provisions for combustion air and dilution air from the outdoors. Direct-vent appliances shall be installed in accordance with the appliance manufacturer's instructions.
In barbershops, beauty shops and other facilities where chemicals that generate corrosive or flammable products, such as aerosol sprays, are routinely used, nondirect vent-type appliances shall be located in a mechanical room separated or partitioned off from other areas with provisions for combustion air and dilution air from the outdoors. Direct-vent appliances shall be installed in accordance with the appliance manufacturer's instructions.
Equipment and appliances shall
be installed as required by the terms of their approval, in
accordance with the conditions of listing, the manufacturer's
instructions and this code. Manufacturer's installation
instructions shall be available on the job site at the time of
inspection. Where a code provision is less restrictive than the
conditions of the listing of the equipment or appliance or the
manufacturer's installation instructions, the conditions of the
listing and the manufacturer's installation instructions shall
apply.
Unlisted appliances approved in accordance with Section G2404.3 shall be limited to uses recommended by the manufacturer and shall be installed in accordance with the manufacturer's instructions, the provisions of this code and the requirements determined by the code official.
Unlisted appliances approved in accordance with Section G2404.3 shall be limited to uses recommended by the manufacturer and shall be installed in accordance with the manufacturer's instructions, the provisions of this code and the requirements determined by the code official.
Equipment
and appliances having an ignition source shall be elevated
such that the source of ignition is not less than 18 inches (457 mm) above the floor in hazardous locations and public
garages, private garages, repair garages, motor fuel-dispensing
facilities and parking garages. For the purpose of this section,
rooms or spaces that are not part of the living space of a
dwelling unit and that communicate directly with a private
garage through openings shall be considered to be part of the
private garage.
Exception: Elevation of the ignition source is not required
for appliances that are listed as flammable-vapor-ignition
resistant.
In residential garages where appliances are installed in a
separate, enclosed space having access only from outside
of the garage, such appliances shall be permitted to be
installed at floor level, provided that the required combustion
air is taken from the exterior of the garage.
Appliances located in private
garages shall be installed with a minimum clearance of 6
feet (1829 mm) above the floor.
Exception: The requirements of this section shall not
apply where the appliances are protected from motor vehicle
impact and installed in accordance with Section
G2408.2.
Equipment and
appliances installed at grade level shall be supported on a
level concrete slab or other approved material extending not
less than 3 inches (76 mm) above adjoining grade or shall be
suspended not less than 6 inches (152 mm) above adjoining
grade. Such supports shall be installed in accordance with the
manufacturer's instructions.
Heat-producing equipment and appliances shall be installed
to maintain the required clearances to combustible construction
as specified in the listing and manufacturer's instructions.
Such clearances shall be reduced only in accordance
with Section G2409. Clearances to combustibles shall
include such considerations as door swing, drawer pull, overhead
projections or shelving and window swing. Devices,
such as door stops or limits and closers, shall not be used to
provide the required clearances.
Appliances
shall be supported and connected to the piping so as not to
exert undue strain on the connections.
This section shall govern the reduction
in required clearances to combustible materials, including
gypsum board, and combustible assemblies for chimneys,
vents, appliances, devices and equipment. Clearance requirements
for air-conditioning equipment and central heating
boilers and furnaces shall comply with Sections G2409.3 and
G2409.4.
The allowable clearance
reduction shall be based on one of the methods specified in
Table G2409.2 or shall utilize a reduced clearance protective assembly listed and labeled in accordance with UL 1618.
Where required clearances are not listed in Table G2409.2, the
reduced clearances shall be determined by linear interpolation
between the distances listed in the table. Reduced clearances
shall not be derived by extrapolation below the range of the
table. The reduction of the required clearances to combustibles
for listed and labeled appliances and equipment shall be
in accordance with the requirements of this section, except that
such clearances shall not be reduced where reduction is specifically prohibited by the terms of the appliance or equipment
listing [see Figures G2409.2(1) through 2409.2(3)].
For SI: 1 inch = 25.4 mm, °C = [(°F - 32)/1.8], 1 pound per cubic foot= 16.02 kg/m3, 1 Btu per inch per square foot per hour per °F = 0.144 W/m2•K.
NOTES:
"A" equals the clearance without protection.
"B" equals the reduced clearance permitted in accordance with Table G2409.2. The protection applied to the construction using combustible material shall extend far enough in each direction to make "C" equal to "A."
FIGURE G2409.2(1) [308.2(1)]
EXTENT OF PROTECTION NECESSARY TO REDUCE CLEARANCES FROM GAS EQUIPMENT OR VENT CONNECTORS
For SI: 1 inch = 25.4 mm.
FIGURE G2409.2(2) [308.2(2)]
WALL PROTECTOR CLEARANCE REDUCTION SYSTEM
For SI: 1 inch= 25.4 mm.
FIGURE G2409.2(3) [308.2(3)]
MASONRY CLEARANCE REDUCTION SYSTEM
| TYPE OF PROTECTION APPLIED TO AND COVERING ALL SURFACES OF COMBUSTIBLE MATERIAL WITHIN THE DISTANCE SPECIFIED AS THE REQUIRED CLEARANCE WITH NO PROTECTION [see Figures G2409.2(1), G2409.2(2), and G2409.2(3)] |
WHERE THE REQUIRED CLEARANCE WITH NO PROTECTION FROM APPLIANCE, VENT CONNECTOR, OR SINGLE-WALL METAL PIPE IS: (inches) |
|||||||||
| 36 | 18 | 12 |
9 | 6 | ||||||
| Allowable clearances with specified protection (inches) | ||||||||||
| Use Column 1 for clearances above appliance or horizontal connector. Use Column 2 for clearances from appliance, vertical connector and single-wall metal pipe. |
||||||||||
| Above Col. 1 |
Sides and clear Col. 2 |
Above Col. 1 |
Sides and clear Col. 2 |
Above Col. 1 |
Sides and clear Col. 2 |
Above Col. 1 |
Sides and clear Col. 2 |
Above Col. 1 |
Sides and clear Col. 2 |
|
|
- | 24 | - | 12 | - | 9 | - | 6 | - | 5 |
|
24 | 18 | 12 | 9 | 9 | 6 | 6 | 5 | 4 | 3 |
|
18 | 12 | 9 | 6 | 6 | 4 | 5 | 3 | 3 | 3 |
|
- | 12 | - | 6 | - | 6 | - | 6 | - | 6 |
|
18 | 12 | 9 | 6 | 6 | 4 | 5 | 3 | 3 | 2 |
|
18 | 12 | 9 | 6 | 6 | 4 | 5 | 3 | 3 | 3 |
|
18 | 12 | 9 | 6 | 6 | 4 | 5 | 3 | 3 | 3 |
|
18 | 12 | 9 | 6 | 6 | 4 | 5 | 3 | 3 | 3 |
- Reduction of clearances from combustible materials shall not interfere with combustion air, draft hood clearance and relief, and accessibility of servicing.
- All clearances shall be measured from the outer surface of the combustible material to the nearest point on the surface of the appliance, disregarding any intervening protection applied to the combustible material.
- Spacers and ties shall be of noncombustible material. A spacer or tie shall not be used directly opposite an appliance or connector.
- For all clearance reduction systems using a ventilated airspace, adequate provision for air circulation shall be provided as described [see Figures 02409.2(2) and 02409.2(3)].
- There shall be at least 1 inch between clearance reduction systems and combustible walls and ceilings for reduction systems using ventilated airspace.
- Where a wall protector is mounted on a single flat wall away from corners, it shall have an air gap of not less than 1 inch. To provide air circulation, the bottom and top edges, or only the side and top edges, or all edges shall be left open.
- Mineral wool batts (blanket or board) shall have a density of not less than 8 pounds per cubic foot and a melting point of not less than 1500°F.
- Insulation material used as part of a clearance reduction system shall have a thermal conductivity of 1.0 Btu per inch per square foot per hour per °F or less.
- There shall be not less than 1 inch between the appliance and the protector. The clearance between the appliance and the combustible surface shall not be reduced below that allowed in this table.
- All clearances and thicknesses are minimum; larger clearances and thicknesses are acceptable.
- Listed single-wall connectors shall be installed in accordance with the manufacturer's instructions.
"A" equals the clearance without protection.
"B" equals the reduced clearance permitted in accordance with Table G2409.2. The protection applied to the construction using combustible material shall extend far enough in each direction to make "C" equal to "A."
EXTENT OF PROTECTION NECESSARY TO REDUCE CLEARANCES FROM GAS EQUIPMENT OR VENT CONNECTORS
WALL PROTECTOR CLEARANCE REDUCTION SYSTEM
MASONRY CLEARANCE REDUCTION SYSTEM
Clearance requirements for indoor air-conditioning
appliances shall comply with Sections G2409.3.1 through
G2409.3.4.
Air-conditioning
appliances shall be installed with clearances in
accordance with the manufacturer's instructions.
Air-conditioning
appliances shall be permitted to be installed with
reduced clearances to combustible material, provided that
the combustible material or appliance is protected as
described in Table G2409.2 and such reduction is allowed
by the manufacturer's instructions.
Clearance requirements for central-heating boilers and furnaces shall comply with Sections G2409.4.1 through
02409.4.5. The clearance to these appliances shall not interfere
with combustion air; draft hood clearance and relief; and
accessibility for servicing.
Central-heating
furnaces and low-pressure boilers shall be
installed with clearances in accordance with the manufacturer's
instructions.
Central-heating
furnaces and low-pressure boilers shall be permitted to
be installed with reduced clearances to combustible material
provided that the combustible material or appliance is
protected as described in Table G2409.2 and such reduction
is allowed by the manufacturer's instructions.
Gas piping shall not be used as a grounding electrode.
Electrical connections
between appliances and the building wiring, including the
grounding of the appliances, shall conform to Chapters 34
through 43.
Each
above-ground portion of a gas piping system other than corrugated
stainless steel tubing (CSST) that is likely to become
energized shall be electrically continuous and bonded to an
effective ground-fault current path. Gas piping other than
CSST shall be considered to be bonded where it is connected
to appliances that are connected to the equipment grounding
conductor of the circuit supplying that appliance.
Corrugated stainless steel tubing
(CSST) gas piping systems shall be bonded to the electrical
service grounding electrode system or, where
provided, lightning protection electrode system. The bonding
jumper shall connect to a metallic pipe, pipe fitting, or
CSST fitting between the point of delivery and the CSST
utilizing a device listed for the application. The bonding
jumper shall be not smaller than 6 AWG copper wire or
equivalent, not longer than 75 feet (22860 mm) and accessible.
Gas piping systems that are bonded in accordance
with this section shall be considered effectively bonded
regardless of the amount of CSST in the system. Any additional
grounding electrodes used shall be bonded to the
electrical service grounding electrode system, or where
provided, the lightning protection grounding electrode
system.
R 408.30528a
Exception: CSST piping systems tested and listed by
the manufacturer for installation without additional
bonding when installed in accordance with the listing.
R 408.30528a
This section shall govern the design,
installation, modification and maintenance of piping systems.
The applicability of this code to piping systems extends from
the point of delivery to the connections with the appliances
and includes the design, materials, components, fabrication,
assembly, installation, testing, inspection, operation and
maintenance of such piping systems.
Utility service piping located within
buildings shall be installed in accordance with the structural
safety and fire protection provisions of this code.
The
storage system for liquefied petroleum gas shall be designed
and installed in accordance with the International Fire Code
and NFPA 58.
In modifying
or adding to existing piping systems, sizes shall be
maintained in accordance with this chapter.
Where an additional
appliance is to be served, the existing piping shall be
checked to determine if it has adequate capacity for all appliances
served. If inadequate, the existing system shall be
enlarged as required or separate piping of adequate capacity
shall be provided.
Where two or more
meters are installed on the same premises but supply separate
consumers, the piping systems shall not be interconnected on
the outlet side of the meters.
All pipe utilized for the
installation, extension and alteration of any piping system
shall be sized to supply the full number of outlets for the
intended purpose and shall be sized in accordance with Section
G2413.
Piping, tubing and fittings shall comply with the applicable
referenced standards, specifications and performance criteria
of this code and shall be identified in accordance with Section
G2412.9. Piping, tubing and fittings shall either be tested by
an approved third-party testing agency or certified by an
approved third-party certification agency.
Piping systems
shall be of such size and so installed as to provide a supply of
gas sufficient to meet the maximum demand and supply gas
to each appliance inlet at not less than the minimum supply
pressure required by the appliance.
The volumetric
flow rate of gas to be provided shall be the sum of the maximum
input of the appliances served.
The total connected hourly load shall be used as the basis for pipe sizing, assuming that all appliances could be operating at full capacity simultaneously. Where a diversity of load can be established, pipe sizing shall be permitted to be based on such loads.
The volumetric flow rate of gas to be provided shall be adjusted for altitude where the installation is above 2,000 feet (610 m) in elevation.
The total connected hourly load shall be used as the basis for pipe sizing, assuming that all appliances could be operating at full capacity simultaneously. Where a diversity of load can be established, pipe sizing shall be permitted to be based on such loads.
The volumetric flow rate of gas to be provided shall be adjusted for altitude where the installation is above 2,000 feet (610 m) in elevation.
Gas piping shall be sized in accordance
with one of the following:
- Pipe sizing tables or sizing equations in accordance with Section G2413.4.
- The sizing tables included in a listed piping system's manufacturer's installation instructions.
- Other approved engineering methods.
Where Tables
G2413.4(1) through G2413.4(21) are used to size piping or
tubing, the pipe length shall be determined in accordance
with Section G2413.4.1, G2413.4.2 or G2413.4.3.
Where Equations 24-3 and 24-4 are used to size piping or tubing, the pipe or tubing shall have smooth inside walls and the pipe length shall be determined in accordance with Section G2413.4.1, G2413.4.2 or G2413.4.3.
Notes:
Note: All table entries have been rounded to three significant digits.
Notes:
Notes:
Notes:
Notes:
Notes: All table entries have been rounded to three significant digits.
Notes: All table entries have been rounded to three significant digits.
Notes: All table entries have been rounded to three significant digits.
Notes: All table entries have been rounded to three significant digits.
Notes: All table entries have been rounded to three significant digits.
Notes: All table entries have been rounded to three significant digits.
Notes:
Notes:
Notes:
Notes:
Notes:
Notes:
Note: All table entries have been rounded to three significant digits.
Note: All table entries have been rounded to three significant digits.
Note: All table entries have been rounded to three significant digits.
Where Equations 24-3 and 24-4 are used to size piping or tubing, the pipe or tubing shall have smooth inside walls and the pipe length shall be determined in accordance with Section G2413.4.1, G2413.4.2 or G2413.4.3.
- Low-pressure gas equation [Less than 1½ pounds per
square inch (psi) (10.3 kPa)]:
(Equation 24-3)
- High-pressure gas equation [1.5 psi (10.3 kPa) and above]:
(Equation 24-4)
| D | = | Inside diameter of pipe, inches (mm). |
| Q | = | Input rate appliance(s), cubic feet per hour at 60°F (16°C) and 30-inch mercury column. |
| P1 | = | Upstream pressure, psia (P1 + 14.7). |
| P2 |
= | Downstream pressure, psia (P2 + 14.7). |
| L | = | Equivalent length of pipe, feet. |
| ΔH | = | Pressure drop, inch water column (27.7 inch water column = 1 psi). |
| GAS | EQUATION FACTORS | |
| Cr | Y | |
| Natural gas | 0.6094 | 0.9992 |
| Undiluted propane | 1.2462 | 0.9910 |
For SI: 1 cubic foot = 0.028 m3, 1 foot = 305 mm,
1-inch water column = 0.249 kPa,
1 pound per square inch = 6.895 kPa,
1 British thermal unit per hour = 0.293 W.
1-inch water column = 0.249 kPa,
1 pound per square inch = 6.895 kPa,
1 British thermal unit per hour = 0.293 W.
| Gas | Natural | |||||||||||||
| Inlet Pressure | Less than 2 psi | |||||||||||||
| Pressure Drop | 0.5 in. w.c. | |||||||||||||
| Specific Gravity | 0.60 | |||||||||||||
| PIPE SIZE (inches) | ||||||||||||||
| Nominal | ½ | ¾ | 1 | 1¼ | 1½ | 2 | 2½ | 3 | 4 | 5 | 6 | 8 | 10 | 12 |
| Actual ID | 0.622 | 0.824 | 1.049 | 1.380 | 1.610 | 2.067 | 2.469 | 3.068 | 4.026 | 5.047 | 6.065 | 7.981 | 10.020 | 11.938 |
| Length (ft) | Capacity in Cubic Feet of Gas per Hour | |||||||||||||
| 10 | 172 | 360 | 678 | 1,390 | 2,090 | 4,020 | 6,400 | 11,300 | 23,100 | 41,800 | 67,600 | 139,000 | 252,000 | 399,000 |
| 20 | 118 | 247 | 466 | 957 | 1,430 | 2,760 | 4,400 | 7,780 | 15,900 | 28,700 | 46,500 | 95,500 | 173,000 | 275,000 |
| 30 | 95 | 199 | 374 | 768 | 1,150 | 2,220 | 3,530 | 6,250 | 12,700 | 23,000 | 37,300 | 76,700 | 139,000 | 220,000 |
| 40 | 81 | 170 | 320 | 657 | 985 | 1,900 | 3,020 | 5,350 | 10,900 | 19,700 | 31,900 | 65,600 | 119,000 | 189,000 |
| 50 | 72 | 151 | 284 | 583 | 873 | 1,680 | 2,680 | 4,740 | 9,660 | 17,500 | 28,300 | 58,200 | 106,000 | 167,000 |
| 60 | 65 | 137 | 257 | 528 | 791 | 1,520 | 2,430 | 4,290 | 8,760 | 15,800 | 25,600 | 52,700 | 95,700 | 152,000 |
| 70 | 60 | 126 | 237 | 486 | 728 | 1,400 | 2,230 | 3,950 | 8,050 | 14,600 | 23,600 | 48,500 | 88,100 | 139,000 |
| 80 | 56 | 117 | 220 | 452 | 677 | 1,300 | 2,080 | 3,670 | 7,490 | 13,600 | 22,000 | 45,100 | 81,900 | 130,000 |
| 90 | 52 | 110 | 207 | 424 | 635 | 1,220 | 1,950 | 3,450 | 7,030 | 12,700 | 20,600 | 42,300 | 76,900 | 122,000 |
| 100 | 50 | 104 | 195 | 400 | 600 | 1,160 | 1,840 | 3,260 | 6,640 | 12,000 | 19,500 | 40,000 | 72,600 | 115,000 |
| 125 | 44 | 92 | 173 | 355 | 532 | 1,020 | 1,630 | 2,890 | 5,890 | 10,600 | 17,200 | 35,400 | 64,300 | 102,000 |
| 150 | 40 | 83 | 157 | 322 | 482 | 928 | 1,480 | 2,610 | 5,330 | 9,650 | 15,600 | 32,100 | 58,300 | 92,300 |
| 175 | 37 | 77 | 144 | 296 | 443 | 854 | 1,360 | 2,410 | 4,910 | 8,880 | 14,400 | 29,500 | 53,600 | 84,900 |
| 200 | 34 | 71 | 134 | 275 | 412 | 794 | 1,270 | 2,240 | 4,560 | 8,260 | 13,400 | 27,500 | 49,900 | 79,000 |
| 250 | 30 | 63 | 119 | 244 | 366 | 704 | 1,120 | 1,980 | 4,050 | 7,320 | 11,900 | 24,300 | 44,200 | 70,000 |
| 300 | 27 | 57 | 108 | 221 | 331 | 638 | 1,020 | 1,800 | 3,670 | 6,630 | 10,700 | 22,100 | 40,100 | 63,400 |
| 350 | 25 | 53 | 99 | 203 | 305 | 587 | 935 | 1,650 | 3,370 | 6,100 | 9,880 | 20,300 | 36,900 | 58,400 |
| 400 | 23 | 49 | 92 | 189 | 283 | 546 | 870 | 1,540 | 3,140 | 5,680 | 9,190 | 18,900 | 34,300 | 54,300 |
| 450 | 22 | 46 | 86 | 177 | 266 | 512 | 816 | 1,440 | 2,940 | 5,330 | 8,620 | 17,700 | 32,200 | 50,900 |
| 500 | 21 | 43 | 82 | 168 | 251 | 484 | 771 | 1,360 | 2,780 | 5,030 | 8,150 | 16,700 | 30,400 | 48,100 |
| 550 | 20 | 41 | 78 | 159 | 239 | 459 | 732 | 1,290 | 2,640 | 4,780 | 7,740 | 15,900 | 28,900 | 45,700 |
| 600 | 19 | 39 | 74 | 152 | 228 | 438 | 699 | 1,240 | 2,520 | 4,560 | 7,380 | 15,200 | 27,500 | 43,600 |
| 650 | 18 | 38 | 71 | 145 | 218 | 420 | 669 | 1,180 | 2,410 | 4,360 | 7,070 | 14,500 | 26,400 | 41,800 |
| 700 | 17 | 36 | 68 | 140 | 209 | 403 | 643 | 1,140 | 2,320 | 4,190 | 6,790 | 14,000 | 25,300 | 40,100 |
| 750 | 17 | 35 | 66 | 135 | 202 | 389 | 619 | 1,090 | 2,230 | 4,040 | 6,540 | 13,400 | 24,400 | 38,600 |
| 800 | 16 | 34 | 63 | 130 | 195 | 375 | 598 | 1,060 | 2,160 | 3,900 | 6,320 | 13,000 | 23,600 | 37,300 |
| 850 | 16 | 33 | 61 | 126 | 189 | 363 | 579 | 1,020 | 2,090 | 3,780 | 6,110 | 12,600 | 22,800 | 36,100 |
| 900 | 15 | 32 | 59 | 122 | 183 | 352 | 561 | 992 | 2,020 | 3,660 | 5,930 | 12,200 | 22,100 | 35,000 |
| 950 | 15 | 31 | 58 | 118 | 178 | 342 | 545 | 963 | 1,960 | 3,550 | 5,760 | 11,800 | 21,500 | 34,000 |
| 1,000 | 14 | 30 | 56 | 115 | 173 | 333 | 530 | 937 | 1,910 | 3,460 | 5,600 | 11,500 | 20,900 | 33,100 |
| 1,100 | 14 | 28 | 53 | 109 | 164 | 316 | 503 | 890 | 1,810 | 3,280 | 5,320 | 10,900 | 19,800 | 31,400 |
| 1,200 | 13 | 27 | 51 | 104 | 156 | 301 | 480 | 849 | 1,730 | 3,130 | 5,070 | 10,400 | 18,900 | 30,000 |
| 1,300 | 12 | 26 | 49 | 100 | 150 | 289 | 460 | 813 | 1,660 | 3,000 | 4,860 | 9,980 | 18,100 | 28,700 |
| 1,400 | 12 | 25 | 47 | 96 | 144 | 277 | 442 | 781 | 1,590 | 2,880 | 4,670 | 9,590 | 17,400 | 27,600 |
| 1,500 | 11 | 24 | 45 | 93 | 139 | 267 | 426 | 752 | 1,530 | 2,780 | 4,500 | 9,240 | 16,800 | 26,600 |
| 1,600 | 11 | 23 | 44 | 89 | 134 | 258 | 411 | 727 | 1,480 | 2,680 | 4,340 | 8,920 | 16,200 | 25,600 |
| 1,700 | 11 | 22 | 42 | 86 | 130 | 250 | 398 | 703 | 1,430 | 2,590 | 4,200 | 8,630 | 15,700 | 24,800 |
| 1,800 | 10 | 22 | 41 | 84 | 126 | 242 | 386 | 682 | 1,390 | 2,520 | 4,070 | 8,370 | 15,200 | 24,100 |
| 1,900 | 10 |
21 | 40 | 81 | 122 | 235 | 375 | 662 | 1,350 | 2,440 | 3,960 | 8,130 | 14,800 | 23,400 |
| 2,000 | NA | 20 | 39 | 79 | 119 | 229 | 364 | 644 | 1,310 | 2,380 | 3,850 | 7,910 | 14,400 | 22,700 |
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1-inch water column = 0.2488 kPa,
1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.
1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.
Notes:
- NA means a flow of less than 10 cfh.
- All table entries have been rounded to three significant digits.
| Gas | Natural | ||||||||
| Inlet Pressure | 2.0 psi | ||||||||
| Pressure Drop | 1.0 psi | ||||||||
| Specific Gravity | 0.60 | ||||||||
| PIPE SIZE (inches) | |||||||||
| Nominal | ½ | ¾ | 1 | 1¼ | 1½ | 2 | 2½ | 3 | 4 |
| Actual ID | 0.622 | 0.824 | 1.049 | 1.380 | 1.610 | 2.067 | 2.469 | 3.068 | 4.026 |
| Length (ft) | Capacity in Cubic Feet of Gas per Hour | ||||||||
| 10 | 1,510 | 3,040 | 5,560 | 11,400 | 17,100 | 32,900 | 52,500 | 92,800 | 189,000 |
| 20 | 1,070 | 2,150 | 3,930 | 8,070 | 12,100 | 23,300 | 37,100 | 65,600 | 134,000 |
| 30 | 869 | 1,760 | 3,210 | 6,590 | 9,880 | 19,000 | 30,300 | 53,600 | 109,000 |
| 40 | 753 | 1,520 | 2,780 | 5,710 | 8,550 | 16,500 | 26,300 | 46,400 | 94,700 |
| 50 | 673 | 1,360 | 2,490 | 5,110 | 7,650 | 14,700 | 23,500 | 41,500 | 84,700 |
| 60 | 615 | 1,240 | 2,270 | 4,660 | 6,980 | 13,500 | 21,400 | 37,900 | 77,300 |
| 70 | 569 | 1,150 | 2,100 | 4,320 | 6,470 | 12,500 | 19,900 | 35,100 | 71,600 |
| 80 | 532 | 1,080 | 1,970 | 4,040 | 6,050 | 11,700 | 18,600 | 32,800 | 67,000 |
| 90 | 502 | 1,010 | 1,850 | 3,810 | 5,700 | 11,000 | 17,500 | 30,900 | 63,100 |
| 100 | 462 | 934 | 1,710 | 3,510 | 5,260 | 10,100 | 16,100 | 28,500 | 58,200 |
| 125 | 414 | 836 | 1,530 | 3,140 | 4,700 | 9,060 | 14,400 | 25,500 | 52,100 |
| 150 | 372 | 751 | 1,370 | 2,820 | 4,220 | 8,130 | 13,000 | 22,900 | 46,700 |
| 175 | 344 | 695 | 1,270 | 2,601 | 3,910 | 7,530 | 12,000 | 21,200 | 43,300 |
| 200 | 318 | 642 | 1,170 | 2,410 | 3,610 | 6,960 | 11,100 | 19,600 | 40,000 |
| 250 | 279 | 583 | 1,040 | 2,140 | 3,210 | 6,180 | 9,850 | 17,400 | 35,500 |
| 300 | 253 | 528 | 945 | 1,940 | 2,910 | 5,600 | 8,920 | 15,800 | 32,200 |
| 350 | 232 | 486 | 869 | 1,790 | 2,670 | 5,150 | 8,210 | 14,500 | 29,600 |
| 400 | 216 | 452 | 809 | 1,660 | 2,490 | 4,790 | 7,640 | 13,500 | 27,500 |
| 450 | 203 | 424 | 759 | 1,560 | 2,330 | 4,500 | 7,170 | 12,700 | 25,800 |
| 500 | 192 | 401 | 717 | 1,470 | 2,210 | 4,250 | 6,770 | 12,000 | 24,400 |
| 550 | 182 | 381 | 681 | 1,400 | 2,090 | 4,030 | 6,430 | 11,400 | 23,200 |
| 600 | 174 | 363 | 650 | 1,330 | 2,000 | 3,850 | 6,130 | 10,800 | 22,100 |
| 650 | 166 | 348 | 622 | 1,280 | 1,910 | 3,680 | 5,870 | 10,400 | 21,200 |
| 700 | 160 | 334 | 598 | 1,230 | 1,840 | 3,540 | 5,640 | 9,970 | 20,300 |
| 750 | 154 | 322 | 576 | 1,180 | 1,770 | 3,410 | 5,440 | 9,610 | 19,600 |
| 800 | 149 | 311 | 556 | 1,140 | 1,710 | 3,290 | 5,250 | 9,280 | 18,900 |
| 850 | 144 | 301 | 538 | 1,100 | 1,650 | 3,190 | 5,080 | 8,980 | 18,300 |
| 900 | 139 | 292 | 522 | 1,070 | 1,600 | 3,090 | 4,930 | 8,710 | 17,800 |
| 950 | 135 | 283 | 507 | 1,040 | 1,560 | 3,000 | 4,780 | 8,460 | 17,200 |
| 1,000 | 132 | 275 | 493 | 1,010 | 1,520 | 2,920 | 4,650 | 8,220 | 16,800 |
| 1,100 | 125 | 262 | 468 | 960 | 1,440 | 2,770 | 4,420 | 7,810 | 15,900 |
| 1,200 | 119 | 250 | 446 | 917 | 1,370 | 2,640 | 4,220 | 7,450 | 15,200 |
| 1,300 | 114 | 239 | 427 | 878 | 1,320 | 2,530 | 4,040 | 7,140 | 14,600 |
| 1,400 | 110 | 230 | 411 | 843 | 1,260 | 2,430 | 3,880 | 6,860 | 14,000 |
| 1,500 | 106 | 221 | 396 | 812 | 1,220 | 2,340 | 3,740 | 6,600 | 13,500 |
| 1,600 | 102 | 214 | 382 | 784 | 1,180 | 2,260 | 3,610 | 6,380 | 13,000 |
| 1,700 | 99 | 207 | 370 | 759 | 1,140 | 2,190 | 3,490 | 6,170 | 12,600 |
| 1,800 | 96 | 200 | 358 | 736 | 1,100 | 2,120 | 3,390 | 5,980 | 12,200 |
| 1,900 | 93 | 195 | 348 | 715 | 1,070 | 2,060 | 3,290 | 5,810 | 11,900 |
| 2,000 | 91 | 189 | 339 | 695 | 1,040 | 2,010 | 3,200 | 5,650 | 11,500 |
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1-inch water column = 0.2488 kPa,
1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.
1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.
Note: All table entries have been rounded to three significant digits.
| Gas | Natural | |||||||||
| Inlet Pressure | Less than 2 psi | |||||||||
| Pressure Drop | 0.5 in. w.c. | |||||||||
| Specific Gravity | 0.60 | |||||||||
| Nominal | K & L | ¼ | ⅜ | ½ | ⅝ | ¾ | 1 | 1¼ | 1½ | 2 |
| ACR | ⅜ | ½ | ⅝ | ¾ | ⅞ | 1⅛ | 1⅜ | - | - | |
| Outside | 0.375 | 0.500 | 0.625 | 0.750 | 0.875 | 1.125 | 1.375 | 1.625 | 2.125 | |
| Inside | 0.305 | 0.402 | 0.527 | 0.652 | 0.745 | 0.995 | 1.245 | 1.481 | 1.959 | |
| Length (ft) | Capacity in Cubic Feet of Gas per Hour | |||||||||
| 10 |
27 | 55 | 111 | 195 | 276 | 590 | 1,060 | 1,680 | 3,490 | |
| 20 | 18 | 38 | 77 | 134 | 190 | 406 | 730 | 1,150 | 2,400 | |
| 30 | 15 | 30 | 61 | 107 | 152 | 326 | 586 | 925 | 1,930 | |
| 40 | 13 | 26 | 53 | 92 | 131 | 279 | 502 | 791 | 1,650 | |
| 50 | 11 | 23 | 47 | 82 | 116 | 247 | 445 | 701 | 1,460 | |
| 60 | 10 | 21 | 42 | 74 | 105 | 224 | 403 | 635 | 1,320 | |
| 70 | NA | 19 | 39 | 68 | 96 | 206 | 371 | 585 | 1,220 | |
| 80 | NA | 18 | 36 | 63 | 90 | 192 | 345 | 544 | 1,130 | |
| 90 | NA | 17 | 34 | 59 | 84 | 180 | 324 | 510 | 1,060 | |
| 100 |
NA | 16 | 32 | 56 | 79 | 170 | 306 | 482 | 1,000 | |
| 125 | NA | 14 | 28 | 50 | 70 | 151 | 271 | 427 | 890 | |
| 150 | NA | 13 | 26 | 45 | 64 | 136 | 245 | 387 | 806 | |
| 175 | NA | 12 | 24 | 41 | 59 | 125 | 226 | 356 | 742 | |
| 200 | NA | 11 | 22 | 39 | 55 | 117 | 210 | 331 | 690 | |
| 250 | NA | NA | 20 | 34 | 48 | 103 | 186 | 294 | 612 | |
| 300 | NA | NA | 18 | 31 | 44 | 94 | 169 | 266 | 554 | |
| 350 | NA | NA | 16 | 28 | 40 | 86 | 155 | 245 | 510 | |
| 400 | NA | NA | 15 | 26 | 38 | 80 | 144 | 228 | 474 | |
| 450 | NA | NA | 14 | 25 | 35 | 75 | 135 | 214 | 445 | |
| 500 | NA | NA | 13 | 23 | 33 | 71 | 128 | 202 | 420 | |
| 550 | NA | NA | 13 | 22 | 32 | 68 | 122 | 192 | 399 | |
| 600 | NA | NA | 12 | 21 | 30 | 64 | 116 | 183 | 381 | |
| 650 | NA | NA | 12 | 20 | 29 | 62 | 111 |
175 | 365 | |
| 700 | NA | NA | 11 | 20 | 28 | 59 | 107 | 168 | 350 | |
| 750 | NA | NA | 11 | 19 | 27 | 57 | 103 | 162 | 338 | |
| 800 | NA | NA | 10 |
18 | 26 | 55 | 99 | 156 | 326 | |
| 850 | NA | NA | 10 |
18 | 25 | 53 | 96 | 151 | 315 | |
| 900 | NA | NA | NA | 17 | 24 | 52 | 93 | 147 | 306 | |
| 950 | NA | NA | NA | 17 | 24 | 50 | 90 | 143 | 297 | |
| 1,000 | NA | NA | NA | 16 | 23 | 49 | 88 | 139 | 289 | |
| 1,100 | NA | NA | NA | 15 | 22 | 46 | 84 | 132 | 274 | |
| 1,200 | NA | NA | NA | 15 | 21 | 44 | 80 | 126 | 262 | |
| 1,300 | NA | NA | NA | 14 | 20 | 42 | 76 | 120 | 251 | |
| 1,400 | NA | NA | NA | 13 | 19 | 41 | 73 | 116 | 241 | |
| 1,500 | NA | NA | NA | 13 | 18 | 39 | 71 | 111 |
232 | |
| 1,600 | NA | NA | NA | 13 | 18 | 38 | 68 | 108 | 224 | |
| 1,700 | NA | NA | NA | 12 | 17 | 37 | 66 | 104 | 217 | |
| 1,800 | NA | NA | NA | 12 | 17 | 36 | 64 | 101 | 210 | |
| 1,900 | NA | NA | NA | 11 | 16 | 35 | 62 | 98 | 204 | |
| 2,000 | NA | NA | NA | 11 | 16 | 34 | 60 | 95 | 199 | |
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1-inch water column = 0.2488 kPa,
1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.
1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.
Notes:
| Gas | Natural | |||||||||
| Inlet Pressure | 2 psi | |||||||||
| Pressure Drop | 1.0 psi | |||||||||
| Specific Gravity | 0.60 | |||||||||
| Nominal | K & L | ¼ | ⅜ | ½ | ⅝ | ¾ | 1 | 1¼ | 1½ | 2 |
| ACR | ⅜ | ½ | ⅝ | ¾ | ⅞ | 1⅛ | 1⅜ | - | - | |
| Outside | 0.375 | 0.500 | 0.625 | 0.750 | 0.875 | 1.125 | 1.375 | 1.625 | 2.125 | |
| Inside | 0.305 | 0.402 | 0.527 | 0.652 | 0.745 | 0.995 | 1.245 | 1.481 | 1.959 | |
| Length (ft) | Capacity in Cubic Feet of Gas per Hour | |||||||||
| 10 |
245 | 506 | 1,030 | 1,800 | 2,550 | 5,450 | 9,820 | 15,500 | 32,200 | |
| 20 | 169 | 348 | 708 | 1,240 | 1,760 | 3,750 | 6,750 | 10,600 | 22,200 | |
| 30 | 135 | 279 | 568 | 993 | 1,410 | 3,010 | 5,420 | 8,550 | 17,800 | |
| 40 | 116 | 239 | 486 | 850 | 1,210 | 2,580 | 4,640 | 7,310 | 15,200 | |
| 50 | 103 | 212 | 431 | 754 | 1,070 | 2,280 | 4,110 | 6,480 | 13,500 | |
| 60 | 93 | 192 | 391 | 683 | 969 | 2,070 | 3,730 | 5,870 | 12,200 | |
| 70 | 86 | 177 | 359 | 628 | 891 | 1,900 | 3,430 | 5,400 | 11,300 | |
| 80 | 80 | 164 | 334 | 584 | 829 | 1,770 | 3,190 | 5,030 | 10,500 | |
| 90 | 75 | 154 | 314 | 548 | 778 | 1,660 | 2,990 | 4,720 | 9,820 | |
| 100 |
71 | 146 | 296 | 518 | 735 | 1,570 | 2,830 | 4,450 | 9,280 | |
| 125 | 63 | 129 | 263 | 459 | 651 | 1,390 | 2,500 | 3,950 | 8,220 | |
| 150 | 57 | 117 | 238 | 416 | 590 | 1,260 | 2,270 | 3,580 | 7,450 | |
| 175 | 52 | 108 | 219 | 383 | 543 | 1,160 | 2,090 | 3,290 | 6,850 | |
| 200 | 49 | 100 | 204 | 356 | 505 | 1,080 | 1,940 | 3,060 | 6,380 | |
| 250 | 43 | 89 | 181 | 315 | 448 | 956 | 1,720 | 2,710 | 5,650 | |
| 300 | 39 | 80 | 164 | 286 | 406 | 866 | 1,560 | 2,460 | 5,120 | |
| 350 | 36 | 74 | 150 | 263 | 373 | 797 | 1,430 | 2,260 | 4,710 | |
| 400 | 33 | 69 | 140 | 245 | 347 | 741 | J,330 | 2,100 | 4,380 | |
| 450 | 31 | 65 | 131 | 230 | 326 | 696 | 1,250 | 1,970 | 4,110 | |
| 500 | 30 | 61 | 124 | 217 | 308 | 657 | 1,180 | 1,870 | 3,880 | |
| 550 | 28 | 58 | Jl8 | 206 | 292 | 624 | 1,120 | 1,770 | 3,690 | |
| 600 | 27 | 55 | 112 | 196 | 279 | 595 | 1,070 | 1,690 | 3,520 | |
| 650 | 26 | 53 | 108 | 188 | 267 | 570 | 1,030 | 1,620 | 3,370 | |
| 700 | 25 | 51 | 103 | 181 | 256 | 548 | 986 | 1,550 | 3,240 | |
| 750 | 24 | 49 | 100 | 174 | 247 | 528 | 950 | 1,500 | 3,120 | |
| 800 | 23 | 47 | 96 | 168 | 239 | 510 | 917 | 1,450 | 3,010 | |
| 850 | 22 | 46 | 93 | 163 | 231 | 493 | 888 | 1,400 | 2,920 | |
| 900 | 22 | 44 | 90 | 158 | 224 | 478 | 861 | 1,360 | 2,830 | |
| 950 | 21 | 43 | 88 | 153 | 217 | 464 | 836 | 1,320 | 2,740 | |
| 1,000 | 20 | 42 | 85 | 149 | 211 | 452 | 813 | 1,280 | 2,670 | |
| 1,100 | 19 | 40 | 81 | 142 | 201 | 429 | 772 | 1,220 | 2,540 | |
| 1,200 | 18 | 38 | 77 | 135 | 192 | 409 | 737 | 1,160 | 2,420 | |
| 1,300 | 18 | 36 | 74 | 129 | 183 | 392 | 705 | 1,110 | 2,320 | |
| 1,400 | 17 | 35 | 71 | 124 | 176 | 376 | 678 | 1,070 | 2,230 | |
| 1,500 | 16 | 34 | 68 | 120 | 170 | 363 | 653 | 1,030 | 2,140 | |
| 1,600 | 16 | 33 | 66 | 116 | 164 | 350 | 630 | 994 | 2,070 | |
| 1,700 | 15 | 31 | 64 | 112 | 159 | 339 | 610 | 962 | 2,000 | |
| 1,800 | 15 | 30 | 62 | 108 | 154 | 329 | 592 | 933 | 1,940 | |
| 1,900 | 14 | 30 | 60 | 105 | 149 | 319 | 575 | 906 | 1,890 | |
| 2,000 | 14 | 29 | 59 | 102 | 145 | 310 | 559 | 881 | 1,830 | |
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1-inch water column = 0.2488 kPa,
1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.
1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.
Notes:
| Gas | Natural | |||||||||||||
| Inlet Pressure | Less than 2 psi | |||||||||||||
| Pressure Drop | 0.5 in. w.c. | |||||||||||||
| Specific Gravity | 0.60 | |||||||||||||
| TUBE SIZE (EHD) | ||||||||||||||
| Flow Designation |
13 | 15 | 18 | 19 | 23 | 25 | 30 | 31 | 37 |
39 | 46 | 48 | 60 |
62 |
| Length (ft) | Capacity in Cubic Feet of Gas per Hour | |||||||||||||
| 5 | 46 | 63 | 115 | 134 | 225 | 270 | 471 | 546 | 895 | 1,037 | 1,790 | 2,070 | 3,660 | 4,140 |
| 10 | 32 | 44 | 82 | 95 | 161 | 192 | 330 | 383 | 639 | 746 | 1,260 | 1,470 | 2,600 | 2,930 |
| 15 | 25 | 35 | 66 | 77 | 132 | 157 | 267 | 310 | 524 | 615 | 1,030 | 1,200 | 2,140 | 2,400 |
| 20 | 22 | 31 | 58 | 67 | 116 | 137 | 231 | 269 | 456 | 536 | 888 | 1,050 | 1,850 | 2,080 |
| 25 | 19 | 27 | 52 | 60 | 104 | 122 | 206 | 240 | 409 | 482 | 793 | 936 | 1,660 | 1,860 |
| 30 | 18 | 25 | 47 | 55 | 96 | 112 | 188 | 218 | 374 | 442 | 723 | 856 | 1,520 | 1,700 |
| 40 | 15 | 21 | 41 | 47 | 83 | 97 | 162 | 188 | 325 | 386 | 625 | 742 | 1,320 | 1,470 |
| 50 | 13 | 19 | 37 | 42 | 75 | 87 | 144 | 168 | 292 | 347 | 559 | 665 | 1,180 | 1,320 |
| 60 | 12 | 17 | 34 | 38 | 68 | 80 | 131 | 153 | 267 | 318 | 509 | 608 | 1,080 | 1,200 |
| 70 | 11 | 16 | 31 | 36 | 63 | 74 | 121 | 141 | 248 | 295 | 471 | 563 | 1,000 | 1,110 |
| 80 | 10 | 15 | 29 | 33 | 60 | 69 | 113 | 132 | 232 | 277 | 440 | 527 | 940 | 1,040 |
| 90 | 10 | 14 | 28 | 32 | 57 | 65 | 107 | 125 | 219 | 262 | 415 | 498 | 887 | 983 |
| 100 | 9 | 13 | 26 | 30 | 54 | 62 | 101 | 118 | 208 | 249 | 393 | 472 | 843 | 933 |
| 150 | 7 | 10 | 20 | 23 | 42 | 48 | 78 | 91 | 171 | 205 | 320 | 387 | 691 | 762 |
| 200 | 6 | 9 | 18 | 21 | 38 | 44 | 71 | 82 | 148 | 179 | 277 | 336 | 600 | 661 |
| 250 | 5 | 8 | 16 | 19 | 34 | 39 | 63 | 74 | 133 | 161 | 247 | 301 | 538 | 591 |
| 300 | 5 | 7 | 15 | 17 | 32 | 36 | 57 | 67 | 95 | 148 | 226 | 275 | 492 | 540 |
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1-inch water column = 0.2488 kPa,
1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.
1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.
Notes:
- Table includes losses for four 90-degree bends and two end fittings. Tubing runs with larger numbers of bends or fittings shall be increased by an equivalent length of tubing to the following equation: L = 1.3n, where L is additional length (feet) of tubing and n is the number of additional fittings or bends.
- EHD-Equivalent Hydraulic Diameter, which is a measure of the relative hydraulic efficiency between different tubing sizes. The greater the value of EHD, the greater the gas capacity of the tubing.
- All table entries have been rounded to three significant digits.
| Gas | Natural | |||||||||||||
| Inlet Pressure | 2.0 psi | |||||||||||||
| Pressure Drop | 1.0 psi | |||||||||||||
| Specific Gravity | 0.60 | |||||||||||||
| TUBE SIZE (EHD) | ||||||||||||||
| Flow Designation |
13 | 15 | 18 | 19 | 23 | 25 | 30 | 31 | 37 |
39 | 46 | 48 | 60 |
62 |
| Length (ft) | Capacity in Cubic Feet of Gas per Hour | |||||||||||||
| 10 | 270 | 353 | 587 | 700 | 1,100 | 1,370 | 2,590 | 2,990 | 4,510 | 5,037 | 9,600 | 10,700 | 18,600 | 21,600 |
| 25 | 166 | 220 | 374 | 444 | 709 | 876 | 1,620 | 1,870 | 2,890 | 3,258 | 6,040 | 6,780 | 11,900 | 13,700 |
| 30 | 151 | 200 | 342 | 405 | 650 | 801 | 1,480 | 1,700 | 2,640 | 2,987 | 5,510 | 6,200 | 10,900 | 12,500 |
| 40 | 129 | 172 | 297 | 351 | 567 | 696 | 1,270 | 1,470 | 2,300 | 2,605 | 4,760 | 5,380 | 9,440 | 10,900 |
| 50 | 115 | 154 | 266 | 314 | 510 | 624 | 1,140 | 1,310 | 2,060 | 2,343 | 4,260 | 4,820 | 8,470 | 9,720 |
| 75 | 93 | 124 | 218 | 257 | 420 | 512 | 922 | 1,070 | 1,690 | 1,932 | 3,470 | 3,950 | 6,940 | 7,940 |
| 80 | 89 | 120 | 211 | 249 | 407 | 496 | 892 | 1,030 | 1,640 | 1,874 | 3,360 | 3,820 | 6,730 | 7,690 |
| 100 | 79 | 107 | 189 | 222 | 366 | 445 | 795 | 920 | 1,470 | 1,685 | 3,000 | 3,420 | 6,030 | 6,880 |
| 150 | 64 | 87 | 155 | 182 | 302 | 364 | 646 | 748 | 1,210 | 1,389 | 2,440 | 2,800 | 4,940 | 5,620 |
| 200 | 55 | 75 | 135 | 157 | 263 | 317 | 557 | 645 | 1,050 | 1,212 | 2,110 | 2,430 | 4,290 | 4,870 |
| 250 | 49 | 67 | 121 | 141 | 236 | 284 | 497 | 576 | 941 | 1,090 | 1,890 | 2,180 | 3,850 | 4,360 |
| 300 | 44 | 61 | 110 | 129 | 217 | 260 | 453 | 525 | 862 | 999 | 1,720 | 1,990 | 3,520 | 3,980 |
| 400 | 38 | 52 | 96 | 111 | 189 | 225 | 390 | 453 | 749 | 871 | 1,490 | 1,730 | 3,060 | 3,450 |
| 500 | 34 | 46 | 86 | 100 | 170 | 202 | 348 | 404 | 552 | 783 | 1,330 | 1,550 | 2,740 | 3,090 |
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1-inch water column = 0.2488 kPa,
1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.
1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.
Notes:
- Table does not include effect of pressure drop across the line regulator. Where regulator loss exceeds ¾ psi, DO NOT USE THIS TABLE. Consult with the regulator manufacturer for pressure drops and capacity factors. Pressure drops across a regulator can vary with flow rate.
- CAUTION: Capacities shown in the table might exceed maximum capacity for a selected regulator. Consult with the regulator or tubing manufacturer for guidance.
- Table includes losses for four 90-degree bends and two end fittings. Tubing runs with larger numbers of bends or fittings shall be increased by an equivalent length of tubing to the following equation: L = 1.3n, where L is additional length (feet) of tubing and n is the number of additional fittings or bends.
- EHD-Equivalent Hydraulic Diameter, which is a measure of the relative hydraulic efficiency between different tubing sizes. The greater the value of EHD, the greater the gas capacity of the tubing.
- All table entries have been rounded to three significant digits.
| Gas | Natural | |||||
| Inlet Pressure | Less than 2 psi | |||||
| Pressure Drop | 0.5 in. w.c. | |||||
| Specific Gravity | 0.60 | |||||
| PIPE SIZE (inches) | ||||||
| Nominal OD | ½ | ¾ | 1 | 1¼ | 1½ | 2 |
| Designation | SDR 9 | SDR 11 | SDR 11 | SDR 10 | SDR 11 | SDR 11 |
| Actual ID | 0.660 | 0.860 | 1.077 | 1.328 | 1.554 | 1.943 |
| Length (ft) | Capacity in Cubic Feet of Gas per Hour | |||||
| 10 | 201 | 403 | 726 | 1,260 | 1,900 | 3,410 |
| 20 | 138 | 277 | 499 | 865 | 1,310 | 2,350 |
| 30 | 111 | 222 | 401 | 695 | 1,050 | 1,880 |
| 40 | 95 | 190 | 343 | 594 | 898 | 1,610 |
| 50 | 84 | 169 | 304 | 527 | 796 | 1,430 |
| 60 | 76 | 153 | 276 | 477 | 721 | 1,300 |
| 70 | 70 | 140 | 254 | 439 | 663 | 1,190 |
| 80 | 65 | 131 | 236 | 409 | 617 | 1,110 |
| 90 | 61 | 123 | 221 | 383 | 579 | 1,040 |
| 100 | 58 | 116 | 209 | 362 | 547 | 983 |
| 125 | 51 | 103 | 185 | 321 | 485 | 871 |
| 150 | 46 | 93 | 168 | 291 | 439 | 789 |
| 175 | 43 | 86 | 154 | 268 | 404 | 726 |
| 200 | 40 | 80 | 144 | 249 | 376 | 675 |
| 250 | 35 | 71 | 127 | 221 | 333 | 598 |
| 300 | 32 | 64 | 115 | 200 | 302 | 542 |
| 350 | 29 | 59 | 106 | 184 | 278 | 499 |
| 400 | 27 | 55 | 99 | 171 | 258 | 464 |
| 450 | 26 | 51 | 93 | 160 | 242 | 435 |
| 500 | 24 | 48 | 88 | 152 | 229 | 411 |
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1-inch water column = 0.2488 kPa,
1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.
1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.
Notes: All table entries have been rounded to three significant digits.
| Gas | Natural | |||||
| Inlet Pressure | 2.0 psi | |||||
| Pressure Drop | 1.0 psi | |||||
| Specific Gravity | 0.60 | |||||
| PIPE SIZE (inches) | ||||||
| Nominal OD | ½ | ¾ | 1 | 1¼ | 1½ | 2 |
| Designation | SDR 9 | SDR 11 | SDR 11 | SDR 10 | SDR 11 | SDR 11 |
| Actual ID | 0.660 | 0.860 | 1.077 | 1.328 | 1.554 | 1.943 |
| Length (ft) | Capacity in Cubic Feet of Gas per Hour | |||||
| 10 | 1.860 | 3,720 | 6,710 | 11,600 | 17,600 | 31,600 |
| 20 | 1,280 | 2,560 | 4,610 | 7,990 | 12,100 | 21,700 |
| 30 | 1,030 | 2,050 | 3,710 | 6,420 | 9,690 | 17,400 |
| 40 | 878 | 1,760 | 3,170 | 5,490 | 8,300 | 14,900 |
| 50 | 778 | 1,560 | 2,810 | 4,870 | 7,350 | 13,200 |
| 60 | 705 | 1,410 | 2,550 | 4,410 | 6,660 | 12,000 |
| 70 | 649 | 1,300 | 2,340 | 4,060 | 6,130 | 11,000 |
| 80 | 603 | 1,210 | 2,180 | 3,780 | 5,700 | 10,200 |
| 90 | 566 | 1,130 | 2,050 | 3,540 | 5,350 | 9,610 |
| 100 | 535 | 1,070 | 1,930 | 3,350 | 5,050 | 9,080 |
| 125 | 474 | 949 | 1,710 | 2,970 | 4,480 | 8,050 |
| 150 | 429 | 860 | 1,550 | 2,690 | 4,060 | 7,290 |
| 175 | 395 | 791 | 1,430 | 2,470 | 3,730 | 6,710 |
| 200 | 368 | 736 | 1,330 | 2,300 | 3,470 | 6,240 |
| 250 | 326 | 652 | 1,180 | 2,040 | 3,080 | 5,530 |
| 300 | 295 | 591 | 1,070 | 1,850 | 2,790 | 5,010 |
| 350 | 272 | 544 | 981 | 1,700 | 2,570 | 4,610 |
| 400 | 253 | 506 | 913 | 1,580 | 2,390 | 4,290 |
| 450 | 237 | 475 | 856 | 1,480 | 2,240 | 4,020 |
| 500 | 224 | 448 | 809 | 1,400 | 2,120 | 3,800 |
| 550 | 213 | 426 | 768 | 1,330 | 2,010 | 3,610 |
| 600 | 203 | 406 | 733 | 1,270 | 1,920 | 3,440 |
| 650 | 194 | 389 | 702 | 1,220 | 1,840 | 3,300 |
| 700 | 187 | 374 | 674 | 1,170 | 1,760 | 3,170 |
| 750 | 180 | 360 | 649 | 1,130 | 1,700 | 3,050 |
| 800 | 174 | 348 | 627 | 1,090 | 1,640 | 2,950 |
| 850 | 168 | 336 | 607 | 1,050 | 1,590 | 2,850 |
| 900 | 163 | 326 | 588 | 1,020 | 1,540 | 2,770 |
| 950 | 158 | 317 | 572 | 990 | 1,500 | 2,690 |
| 1,000 | 154 | 308 | 556 | 963 | 1,450 | 2,610 |
| 1,100 | 146 | 293 | 528 | 915 | 1,380 | 2,480 |
| 1,200 | 139 | 279 | 504 | 873 | 1,320 | 2,370 |
| 1,300 | 134 | 267 | 482 | 836 | 1,260 | 2,270 |
| 1,400 | 128 | 257 | 463 | 803 | 1,210 | 2,180 |
| 1,500 | 124 | 247 | 446 | 773 | 1,170 | 2,100 |
| 1,600 | 119 | 239 | 431 | 747 | 1,130 | 2,030 |
| 1,700 | 115 | 231 | 417 | 723 | 1,090 | 1,960 |
| 1,800 | 112 | 224 | 404 | 701 | 1,060 | 1,900 |
| 1,900 | 109 | 218 | 393 | 680 | 1,030 | 1,850 |
| 2,000 | 106 | 212 | 382 | 662 | 1,000 | 1,800 |
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1-inch water column = 0.2488 kPa,
1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.
1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.
Notes: All table entries have been rounded to three significant digits.
| Gas | Undiluted Propane | ||||||||
| Inlet Pressure | 10.0 psi | ||||||||
| Pressure Drop | 1.0 psi | ||||||||
| Specific Gravity | 1.50 | ||||||||
| INTENDED USE | Pipe sizing between first stage (high-pressure regulator) and second stage (low-pressure regulator). | ||||||||
| PIPE SIZE (inches) | |||||||||
| Nominal |
½ | ¾ | 1 | 1¼ | 1½ | 2 | 2½ | 3 | 4 |
| Actual ID | 0.622 | 0.824 | 1.049 | 1.380 | 1.610 | 2.067 | 2.469 | 3.068 | 4.026 |
| Length (ft) | Capacity in Thousands of Btu per Hour | ||||||||
| 10 | 3,320 | 6,950 | 13,100 | 26,900 | 40,300 | 77,600 | 124,000 | 219,000 | 446,000 |
| 20 | 2,280 | 4,780 | 9,000 | 18,500 | 27,700 | 53,300 | 85,000 | 150,000 | 306,000 |
| 30 | 1,830 | 3,840 | 7,220 | 14,800 | 22,200 | 42,800 | 68,200 | 121,000 | 246,000 |
| 40 | 1,570 | 3,280 | 6,180 | 12,700 | 19,000 | 36,600 | 58,400 | 103,000 | 211,000 |
| 50 | 1,390 | 2,910 | 5,480 | 11,300 | 16,900 | 32,500 | 51,700 | 91,500 | 187,000 |
| 60 | 1,260 | 2,640 | 4,970 | 10,200 | 15,300 | 29,400 | 46,900 | 82,900 | 169,000 |
| 70 | 1,160 | 2,430 | 4,570 | 9,380 | 14,100 | 27,100 | 43,100 | 76,300 | 156,000 |
| 80 | 1,080 | 2,260 | 4,250 | 8,730 | 13,100 | 25,200 | 40,100 | 70,900 | 145,000 |
| 90 | 1,010 | 2,120 | 3,990 | 8,190 | 12,300 | 23,600 | 37,700 | 66,600 | 136,000 |
| 100 | 956 | 2,000 | 3,770 | 7,730 | 11,600 | 22,300 | 35,600 | 62,900 | 128,000 |
| 125 | 848 | 1,770 | 3,340 | 6,850 | 10,300 | 19,800 | 31,500 | 55,700 | 114,000 |
| 150 | 768 | 1,610 | 3,020 | 6,210 | 9,300 | 17,900 | 28,600 | 50,500 | 103,000 |
| 175 | 706 | 1,480 | 2,780 | 5,710 | 8,560 | 16,500 | 26,300 | 46,500 | 94,700 |
| 200 | 657 | 1,370 | 2,590 | 5,320 | 7,960 | 15,300 | 24,400 | 43,200 | 88,100 |
| 250 | 582 | 1,220 | 2,290 | 4,710 | 7,060 | 13,600 | 21,700 | 38,300 | 78,100 |
| 300 | 528 | 1,100 | 2,080 | 4,270 | 6,400 | 12,300 | 19,600 | 34,700 | 70,800 |
| 350 | 486 | 1,020 | 1,910 | 3,930 | 5,880 | 11,300 | 18,100 | 31,900 | 65,100 |
| 400 | 452 | 945 | 1,780 | 3,650 | 5,470 | 10,500 | 16,800 | 29,700 | 60,600 |
| 450 | 424 | 886 | 1,670 | 3,430 | 5,140 | 9,890 | 15,800 | 27,900 | 56,800 |
| 500 | 400 | 837 | 1,580 | 3,240 | 4,850 | 9,340 | 14,900 | 26,300 | 53,700 |
| 550 | 380 | 795 | 1,500 | 3,070 | 4,610 | 8,870 | 14,100 | 25,000 | 51,000 |
| 600 | 363 | 759 | 1,430 | 2,930 | 4,400 | 8,460 | 13,500 | 23,900 | 48,600 |
| 650 | 347 | 726 | 1,370 | 2,810 | 4,210 | 8,110 | 12,900 | 22,800 | 46,600 |
| 700 | 334 | 698 | 1,310 | 2,700 | 4,040 | 7,790 | 12,400 | 21,900 | 44,800 |
| 750 | 321 | 672 | 1,270 | 2,600 | 3,900 | 7,500 | 12,000 | 21,100 | 43,100 |
| 800 | 310 | 649 | 1,220 | 2,510 | 3,760 | 7,240 | 11,500 | 20,400 | 41,600 |
| 850 | 300 | 628 | 1,180 | 2,430 | 3,640 | 7,010 | 11,200 | 19,800 | 40,300 |
| 900 | 291 | 609 | 1,150 | 2,360 | 3,530 | 6,800 | 10,800 | 19,200 | 39,100 |
| 950 | 283 | 592 | 1,110 | 2,290 | 3,430 | 6,600 | 10,500 | 18,600 | 37,900 |
| 1,000 | 275 | 575 | 1,080 | 2,230 | 3,330 | 6,420 | 10,200 | 18,100 | 36,900 |
| 1,100 | 261 | 546 | 1,030 | 2,110 | 3,170 | 6,100 | 9,720 | 17,200 | 35,000 |
| 1,200 | 249 | 521 | 982 | 2,020 | 3,020 | 5,820 | 9,270 | 16,400 | 33,400 |
| 1,300 | 239 | 499 | 940 | 1,930 | 2,890 | 5,570 | 8,880 | 15,700 | 32,000 |
| 1,400 | 229 | 480 | 903 | 1,850 | 2,780 | 5,350 | 8,530 | 15,100 | 30,800 |
| 1,500 | 221 | 462 | 870 | 1,790 | 2,680 | 5,160 | 8,220 | 14,500 | 29,600 |
| 1,600 | 213 | 446 | 840 | 1,730 | 2,590 | 4,980 | 7,940 | 14,000 | 28,600 |
| 1,700 | 206 | 432 | 813 | 1,670 | 2,500 | 4,820 | 7,680 | 13,600 | 27,700 |
| 1,800 | 200 | 419 | 789 | 1,620 | 2,430 | 4,670 | 7,450 | 13,200 | 26,900 |
| 1,900 | 194 | 407 | 766 | 1,570 | 2,360 | 4,540 | 7,230 | 12,800 | 26,100 |
| 2,000 | 189 | 395 | 745 | 1,530 | 2,290 | 4,410 | 7,030 | 12,400 | 25,400 |
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1-inch water column = 0.2488 kPa,
1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.
1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.
Notes: All table entries have been rounded to three significant digits.
| Gas | Undiluted Propane | ||||||||
| Inlet Pressure | 10.0 psi | ||||||||
| Pressure Drop | 3.0 psi | ||||||||
| Specific Gravity | 1.50 | ||||||||
| INTENDED USE | Pipe sizing between first stage (high-pressure regulator) and second stage (low-pressure regulator). | ||||||||
| PIPE SIZE (inches) | |||||||||
| Nominal |
½ | ¾ | 1 | 1¼ | 1½ | 2 | 2½ | 3 | 4 |
| Actual ID | 0.622 | 0.824 | 1.049 | 1.380 | 1.610 | 2.067 | 2.469 | 3.068 | 4.026 |
| Length (ft) | Capacity in Thousands of Btu per Hour | ||||||||
| 10 | 5,890 | 12,300 | 23,200 | 47,600 | 71,300 | 137,000 | 219,000 | 387,000 | 789,000 |
| 20 | 4,050 | 8,460 | 15,900 | 32,700 | 49,000 | 94,400 | 150,000 | 266,000 | 543,000 |
| 30 | 3,250 | 6,790 | 12,800 | 26,300 | 39,400 | 75,800 | 121,000 | 214,000 | 436,000 |
| 40 | 2,780 | 5,810 | 11,000 | 22,500 | 33,700 | 64,900 | 103,000 | 183,000 | 373,000 |
| 50 | 2,460 | 5,150 | 9,710 | 19,900 | 29,900 | 57,500 | 91,600 | 162,000 | 330,000 |
| 60 | 2,230 | 4,670 | 8,790 | 18,100 | 27,100 | 52,100 | 83,000 | 147,000 | 299,000 |
| 70 | 2,050 | 4,300 | 8,090 | 16,600 | 24,900 | 47,900 | 76,400 | 135,000 | 275,000 |
| 80 | 1,910 | 4,000 | 7,530 | 15,500 | 23,200 | 44,600 | 71,100 | 126,000 | 256,000 |
| 90 | 1,790 | 3,750 | 7,060 | 14,500 | 21,700 | 41,800 | 66,700 | 118,000 | 240,000 |
| 100 | 1,690 | 3,540 | 6,670 | 13,700 | 20,500 | 39,500 | 63,000 | 111,000 | 227,000 |
| 125 | 1,500 | 3,140 | 5,910 | 12,100 | 18,200 | 35,000 | 55,800 | 98,700 | 201,000 |
| 150 | 1,360 | 2,840 | 5,360 | 11,000 | 16,500 | 31,700 | 50,600 | 89,400 | 182,000 |
| 175 | 1,250 | 2,620 | 4,930 | 10,100 | 15,200 | 29,200 | 46,500 | 82,300 | 167,800 |
| 200 | 1,160 | 2,430 | 4,580 | 9,410 | 14,100 | 27,200 | 43,300 | 76,500 | 156,100 |
| 250 | 1,030 | 2,160 | 4,060 | 8,340 | 12,500 | 24,100 | 38,400 | 67,800 | 138,400 |
| 300 | 935 | 1,950 | 3,680 | 7,560 | 11,300 | 21,800 | 34,800 | 61,500 | 125,400 |
| 350 | 860 | 1,800 | 3,390 | 6,950 | 10,400 | 20,100 | 32,000 | 56,500 | 115,300 |
| 400 | 800 | 1,670 | 3,150 | 6,470 | 9,690 | 18,700 | 29,800 | 52,600 | 107,300 |
| 450 | 751 | 1,570 | 2,960 | 6,070 | 9,090 | 17,500 | 27,900 | 49,400 | 100,700 |
| 500 | 709 | 1,480 | 2,790 | 5,730 | 8,590 | 16,500 | 26,400 | 46,600 | 95,100 |
| 550 | 673 | 1,410 | 2,650 | 5,450 | 8,160 | 15,700 | 25,000 | 44,300 | 90,300 |
| 600 | 642 | 1,340 | 2,530 | 5,200 | 7,780 | 15,000 | 23,900 | 42,200 | 86,200 |
| 650 | 615 | 1,290 | 2,420 | 4,980 | 7,450 | 14,400 | 22,900 | 40,500 | 82,500 |
| 700 | 591 | 1,240 | 2,330 | 4,780 | 7,160 | 13,800 | 22,000 | 38,900 | 79,300 |
| 750 | 569 | 1,190 | 2,240 | 4,600 | 6,900 | 13,300 | 21,200 | 37,400 | 76,400 |
| 800 | 550 | 1,150 | 2,170 | 4,450 | 6,660 | 12,800 | 20,500 | 36,200 | 73,700 |
| 850 | 532 | 1,110 | 2,100 | 4,300 | 6,450 | 12,400 | 19,800 | 35,000 | 71,400 |
| 900 | 516 | 1,080 | 2,030 | 4,170 | 6,250 | 12,000 | 19,200 | 33,900 | 69,200 |
| 950 | 501 | 1,050 | 1,970 | 4,050 | 6,070 | 11,700 | 18,600 | 32,900 | 67,200 |
| 1,000 | 487 | 1,020 | 1,920 | 3,940 | 5,900 | 11,400 | 18,100 | 32,000 | 65,400 |
| 1,100 | 463 | 968 | 1,820 | 3,740 | 5,610 | 10,800 | 17,200 | 30,400 | 62,100 |
| 1,200 | 442 | 923 | 1,740 | 3,570 | 5,350 | 10,300 | 16,400 | 29,000 | 59,200 |
| 1,300 | 423 | 884 | 1,670 | 3,420 | 5,120 | 9,870 | 15,700 | 27,800 | 56,700 |
| 1,400 | 406 | 849 | 1,600 | 3,280 | 4,920 | 9,480 | 15,100 | 26,700 | 54,500 |
| 1,500 | 391 | 818 | 1,540 | 3,160 | 4,740 | 9,130 | 14,600 | 25,700 | 52,500 |
| 1,600 | 378 | 790 | 1,490 | 3,060 | 4,580 | 8,820 | 14,100 | 24,800 | 50,700 |
| 1,700 | 366 | 765 | 1,440 | 2,960 | 4,430 | 8,530 | 13,600 | 24,000 | 49,000 |
| 1,800 | 355 | 741 | 1,400 | 2,870 | 4,300 | 8,270 | 13,200 | 23,300 | 47,600 |
| 1,900 | 344 | 720 | 1,360 | 2,780 | 4,170 | 8,040 | 12,800 | 22,600 | 46,200 |
| 2,000 | 335 | 700 | 1,320 | 2,710 | 4,060 | 7,820 | 12,500 | 22,000 | 44,900 |
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1-inch water column = 0.2488 kPa,
1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.
1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.
Notes: All table entries have been rounded to three significant digits.
| Gas | Undiluted Propane | ||||||||
| Inlet Pressure | 2.0 psi | ||||||||
| Pressure Drop | 1.0 psi | ||||||||
| Specific Gravity | 1.50 | ||||||||
| INTENDED USE | Pipe sizing between 2 psig service and line pressure regulator. | ||||||||
| PIPE SIZE (inches) | |||||||||
| Nominal |
½ | ¾ | 1 | 1¼ | 1½ | 2 | 2½ | 3 | 4 |
| Actual ID | 0.622 | 0.824 | 1.049 | 1.380 | 1.610 | 2.067 | 2.469 | 3.068 | 4.026 |
| Length (ft) | Capacity in Thousands of Btu per Hour | ||||||||
| 10 | 2,680 | 5,590 | 10,500 | 21,600 | 32,400 | 62,400 | 99,500 | 176,000 | 359,000 |
| 20 | 1,840 | 3,850 | 7,240 | 14,900 | 22,300 | 42,900 | 68,400 | 121,000 | 247,000 |
| 30 | 1,480 | 3,090 | 5,820 | 11,900 | 17,900 | 34,500 | 54,900 | 97,100 | 198,000 |
| 40 | 1,260 | 2,640 | 4,980 | 10,200 | 15,300 | 29,500 | 47,000 | 83,100 | 170,000 |
| 50 | 1,120 | 2,340 | 4,410 | 9,060 | 13,600 | 26,100 | 41,700 | 73,700 | 150,000 |
| 60 | 1,010 | 2,120 | 4,000 | 8,210 | 12,300 | 23,700 | 37,700 | 66,700 | 136,000 |
| 70 | 934 | 1,950 | 3,680 | 7,550 | 11,300 | 21,800 | 34,700 | 61,400 | 125,000 |
| 80 | 869 | 1,820 | 3,420 | 7,020 | 10,500 | 20,300 | 32,300 | 57,100 | 116,000 |
| 90 | 815 | 1,700 | 3,210 | 6,590 | 9,880 | 19,000 | 30,300 | 53,600 | 109,000 |
| 100 |
770 | 1,610 | 3,030 | 6,230 | 9,330 | 18,000 | 28,600 | 50,600 | 103,000 |
| 125 | 682 | 1,430 | 2,690 | 5,520 | 8,270 | 15,900 | 25,400 | 44,900 | 91,500 |
| 150 | 618 | 1,290 | 2,440 | 5,000 | 7,490 | 14,400 | 23,000 | 40,700 | 82,900 |
| 175 | 569 | 1,190 | 2,240 | 4,600 | 6,890 | 13,300 | 21,200 | 37,400 | 76,300 |
| 200 | 529 | 1,110 | 2,080 | 4,280 | 6,410 | 12,300 | 19,700 | 34,800 | 71,000 |
| 250 | 469 | 981 | 1,850 | 3,790 | 5,680 | 10,900 | 17,400 | 30,800 | 62,900 |
| 300 | 425 | 889 | 1,670 | 3,440 | 5,150 | 9,920 | 15,800 | 27,900 | 57,000 |
| 350 | 391 | 817 | 1,540 | 3,160 | 4,740 | 9,120 | 14,500 | 25,700 | 52,400 |
| 400 | 364 | 760 | 1,430 | 2,940 | 4,410 | 8,490 | 13,500 | 23,900 | 48,800 |
| 450 | 341 | 714 | 1,340 | 2,760 | 4,130 | 7,960 | 12,700 | 22,400 | 45,800 |
| 500 | 322 | 674 | 1,270 | 2,610 | 3,910 | 7,520 | 12,000 | 21,200 | 43,200 |
| 550 | 306 | 640 | 1,210 | 2,480 | 3,710 | 7,140 | 11,400 | 20,100 | 41,100 |
| 600 | 292 | 611 | 1,150 | 2,360 | 3,540 | 6,820 | 10,900 | 19,200 | 39,200 |
| 650 | 280 | 585 | 1,100 | 2,260 | 3,390 | 6,530 | 10,400 | 18,400 | 37,500 |
| 700 | 269 | 562 | 1,060 | 2,170 | 3,260 | 6,270 | 9,990 | 17,700 | 36,000 |
| 750 | 259 | 541 | 1,020 | 2,090 | 3,140 | 6,040 | 9,630 | 17,000 | 34,700 |
| 800 | 250 | 523 | 985 | 2,020 | 3,030 | 5,830 | 9,300 | 16,400 | 33,500 |
| 850 | 242 | 506 | 953 | 1,960 | 2,930 | 5,640 | 9,000 | 15,900 | 32,400 |
| 900 | 235 | 490 | 924 | 1,900 | 2,840 | 5,470 | 8,720 | 15,400 | 31,500 |
| 950 | 228 | 476 | 897 | 1,840 | 2,760 | 5,310 | 8,470 | 15,000 | 30,500 |
| 1,000 | 222 | 463 | 873 | 1,790 | 2,680 | 5,170 | 8,240 | 14,600 | 29,700 |
| 1,100 | 210 | 440 | 829 | 1,700 | 2,550 | 4,910 | 7,830 | 13,800 | 28,200 |
| 1,200 | 201 | 420 | 791 | 1,620 | 2,430 | 4,680 | 7,470 | 13,200 | 26,900 |
| 1,300 | 192 | 402 | 757 | 1,550 | 2,330 | 4,490 | 7,150 | 12,600 | 25,800 |
| 1,400 | 185 | 386 | 727 | 1,490 | 2,240 | 4,310 | 6,870 | 12,100 | 24,800 |
| 1,500 | 178 | 372 | 701 | 1,440 | 2,160 | 4,150 | 6,620 | 11,700 | 23,900 |
| 1,600 | 172 | 359 | 677 | 1,390 | 2,080 | 4,010 | 6,390 | 11,300 | 23,000 |
| 1,700 | 166 | 348 | 655 | 1,340 | 2,010 | 3,880 | 6,180 | 10,900 | 22,300 |
| 1,800 | 161 | 337 | 635 | 1,300 | 1,950 | 3,760 | 6,000 | 10,600 | 21,600 |
| 1,900 | 157 | 327 | 617 | 1,270 | 1,900 | 3,650 | 5,820 | 10,300 | 21,000 |
| 2,000 | 152 | 318 | 600 | 1,230 | 1,840 | 3,550 | 5,660 | 10,000 | 20,400 |
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1-inch water column = 0.2488 kPa,
1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.
1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.
Notes: All table entries have been rounded to three significant digits.
| Gas | Undiluted Propane | ||||||||
| Inlet Pressure | 11.0 in. w.c. | ||||||||
| Pressure Drop | 0.5 in. w.c. | ||||||||
| Specific Gravity | 1.50 | ||||||||
| INTENDED USE | Pipe sizing between single- or second-stage (low pressure) regulator and appliance. | ||||||||
| PIPE SIZE (inches) | |||||||||
| Nominal |
½ | ¾ | 1 | 1¼ | 1½ | 2 | 2½ | 3 | 4 |
| Actual ID | 0.622 | 0.824 | 1.049 | 1.380 | 1.610 | 2.067 | 2.469 | 3.068 | 4.026 |
| Length (ft) | Capacity in Thousands of Btu per Hour | ||||||||
| 10 | 291 | 608 | 1,150 | 2,350 | 3,520 | 6,790 | 10,800 | 19,100 | 39,000 |
| 20 | 200 | 418 | 787 | 1,620 | 2,420 | 4,660 | 7,430 | 13,100 | 26,800 |
| 30 | 160 | 336 | 632 | 1,300 | 1,940 | 3,750 | 5,970 | 10,600 | 21,500 |
| 40 | 137 | 287 | 541 | 1,110 | 1,660 | 3,210 | 5,110 | 9,030 | 18,400 |
| 50 | 122 | 255 | 480 | 985 | 1,480 | 2,840 | 4,530 | 8,000 | 16,300 |
| 60 | 110 | 231 | 434 | 892 | 1,340 | 2,570 | 4,100 | 7,250 | 14,800 |
| 80 | 101 | 212 | 400 | 821 | 1,230 | 2,370 | 3,770 | 6,670 | 13,600 |
| 100 | 94 | 197 | 372 | 763 | 1,140 | 2,200 | 3,510 | 6,210 | 12,700 |
| 125 | 89 | 185 | 349 | 716 | 1,070 | 2,070 | 3,290 | 5,820 | 11,900 |
| 150 | 84 | 175 | 330 | 677 | 1,010 | 1,950 | 3,110 | 5,500 | 11,200 |
| 175 | 74 | 155 | 292 | 600 | 899 | 1,730 | 2,760 | 4,880 | 9,950 |
| 200 | 67 | 140 | 265 | 543 | 814 | 1,570 | 2,500 | 4,420 | 9,010 |
| 250 | 62 | 129 | 243 | 500 | 749 | 1,440 | 2,300 | 4,060 | 8,290 |
| 300 | 58 | 120 | 227 | 465 | 697 | 1,340 | 2,140 | 3,780 | 7,710 |
| 350 | 51 | 107 | 201 | 412 | 618 | 1,190 | 1,900 | 3,350 | 6,840 |
| 400 | 46 | 97 | 182 | 373 | 560 | 1,080 | 1,720 | 3,040 | 6,190 |
| 450 | 42 | 89 | 167 | 344 | 515 | 991 | 1,580 | 2,790 | 5,700 |
| 500 | 40 | 83 | 156 | 320 | 479 | 922 | 1,470 | 2,600 | 5,300 |
| 550 | 37 | 78 | 146 | 300 | 449 | 865 | 1,380 | 2,440 | 4,970 |
| 600 | 35 | 73 | 138 | 283 | 424 | 817 | 1,300 | 2,300 | 4,700 |
| 650 | 33 | 70 | 131 | 269 | 403 | 776 | 1,240 | 2,190 | 4,460 |
| 700 | 32 | 66 | 125 | 257 | 385 | 741 | 1,180 | 2,090 | 4,260 |
| 750 | 30 | 64 | 120 | 246 | 368 | 709 | 1,130 | 2,000 | 4,080 |
| 800 | 29 | 61 | 115 | 236 | 354 | 681 | 1,090 | 1,920 | 3,920 |
| 850 | 28 | 59 | Ill | 227 | 341 | 656 | 1,050 | 1,850 | 3,770 |
| 900 | 27 | 57 | 107 | 220 | 329 | 634 | 1,010 | 1,790 | 3,640 |
| 950 | 26 | 55 | 104 | 213 | 319 | 613 | 978 | 1,730 | 3,530 |
| 1,000 | 25 | 53 | 100 | 206 | 309 | 595 | 948 | 1,680 | 3,420 |
| 1,100 | 25 | 52 | 97 | 200 | 300 | 578 | 921 | 1,630 | 3,320 |
| 1,200 | 24 | 50 | 95 | 195 | 292 | 562 | 895 | 1,580 | 3,230 |
| 1,300 | 23 | 48 | 90 | 185 | 277 | 534 | 850 | 1,500 | 3,070 |
| 1,400 | 22 | 46 | 86 | 176 | 264 | 509 | 811 | 1,430 | 2,930 |
| 1,500 | 21 | 44 | 82 | 169 | 253 | 487 | 777 | 1,370 | 2,800 |
| 1,200 | 24 | 50 | 95 | 195 | 292 | 562 | 895 | 1,580 | 3,230 |
| 1,300 | 23 | 48 | 90 | 185 | 277 | 534 | 850 | 1,500 | 3,070 |
| 1,400 | 22 | 46 | 86 | 176 | 264 | 509 | 811 | 1,430 | 2,930 |
| 1,500 | 21 | 44 | 82 | 169 | 253 | 487 | 777 | 1,370 | 2,800 |
| 1,600 | 20 | 42 | 79 | 162 | 243 | 468 | 746 | 1,320 | 2,690 |
| 1,700 | 19 | 40 | 76 | 156 | 234 | 451 | 719 | 1,270 | 2,590 |
| 1,800 | 19 | 39 | 74 | 151 | 226 | 436 | 694 | 1,230 | 2,500 |
| 1,900 | 18 | 38 | 71 | 146 | 219 | 422 | 672 | 1,190 | 2,420 |
| 2,000 | 18 | 37 | 69 | 142 | 212 | 409 | 652 | 1,150 | 2,350 |
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1-inch water column = 0.2488 kPa,
1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.
1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.
Notes: All table entries have been rounded to three significant digits.
| Gas | Undiluted Propane | |||||||||
| Inlet Pressure | 10.0 psi | |||||||||
| Pressure Drop | 1.0 psi | |||||||||
| Specific Gravity | 1.50 | |||||||||
| INTENDED USE | Sizing between first stage (high-pressure regulator) and second stage (low-pressure regulator). | |||||||||
| TUBE SIZE (inches) | ||||||||||
| Nominal | K & L | ¼ | ⅜ | ½ | ⅝ | ¾ | 1 | 1¼ | 1½ | 2 |
| ACR | ⅜ | ½ | ⅝ | ¾ | ⅞ | 1⅛ | 1⅜ | - | - | |
| Outside | 0.375 | 0.500 | 0.625 | 0.750 | 0.875 | 1.125 | 1.375 | 1.625 | 2.125 | |
| Inside | 0.305 | 0.402 | 0.527 | 0.652 | 0.745 | 0.995 | 1.245 | 1.481 | 1.959 | |
| Length (ft) | Capacity in Cubic Feet of Gas per Hour | |||||||||
| 10 | 513 | 1,060 | 2,150 | 3,760 | 5,330 | 11,400 | 20,500 | 32,300 | 67,400 | |
| 20 | 352 | 727 | 1,480 | 2,580 | 3,670 | 7,830 | 14,100 | 22,200 | 46,300 | |
| 30 | 283 | 584 | 1,190 | 2,080 | 2,940 | 6,290 | 11,300 | 17,900 | 37,200 | |
| 40 | 242 | 500 | 1,020 | 1,780 | 2,520 | 5,380 | 9,690 | 15,300 | 31,800 | |
| 50 | 215 | 443 | 901 | 1,570 | 2,230 | 4,770 | 8,590 | 13,500 | 28,200 | |
| 60 | 194 | 401 | 816 | 1,430 | 2,020 | 4,320 | 7,780 | 12,300 | 25,600 | |
| 70 | 179 | 369 | 751 | 1,310 | 1,860 | 3,980 | 7,160 | 11,300 | 23,500 | |
| 80 | 166 | 343 | 699 | 1,220 | 1,730 | 3,700 | 6,660 | 10,500 | 21,900 | |
| 90 | 156 | 322 | 655 | 1,150 | 1,630 | 3,470 | 6,250 | 9,850 | 20,500 | |
| 100 | 147 | 304 | 619 | 1,080 | 1,540 | 3,280 | 5,900 | 9,310 | 19,400 | |
| 125 | 131 | 270 | 549 | 959 | 1,360 | 2,910 | 5,230 | 8,250 | 17,200 | |
| 150 | 118 | 244 | 497 | 869 | 1,230 | 2,630 | 4,740 | 7,470 | 15,600 | |
| 175 | 109 | 225 | 457 | 799 | 1,130 | 2,420 | 4,360 | 6,880 | 14,300 | |
| 200 | 101 | 209 | 426 | 744 | 1,060 | 2,250 | 4,060 | 6,400 | 13,300 | |
| 250 | 90 | 185 | 377 | 659 | 935 | 2,000 | 3,600 | 5,670 | 11,800 | |
| 300 | 81 | 168 | 342 | 597 | 847 | 1,810 | 3,260 | 5,140 | 10,700 | |
| 350 | 75 | 155 | 314 | 549 | 779 | 1,660 | 3,000 | 4,730 | 9,840 | |
| 400 | 70 | 144 | 292 | 511 | 725 | 1,550 | 2,790 | 4,400 | 9,160 | |
| 450 | 65 | 135 | 274 | 480 | 680 | 1,450 | 2,620 | 4,130 | 8,590 | |
| 500 | 62 | 127 | 259 | 453 | 643 | 1,370 | 2,470 | 3,900 | 8,120 | |
| 550 | 59 | 121 | 246 | 430 | 610 | 1,300 | 2,350 | 3,700 | 7,710 | |
| 600 | 56 | 115 | 235 | 410 | 582 | 1,240 | 2,240 | 3,530 | 7,350 | |
| 650 | 54 | 111 | 225 | 393 | 558 | 1,190 | 2,140 | 3,380 | 7,040 | |
| 700 | 51 | 106 | 216 | 378 | 536 | 1,140 | 2,060 | 3,250 | 6,770 | |
| 750 | 50 | 102 | 208 | 364 | 516 | 1,100 | 1,980 | 3,130 | 6,520 | |
| 800 | 48 | 99 | 201 | 351 | 498 | 1,060 | 1,920 | 3,020 | 6,290 | |
| 850 | 46 | 96 | 195 | 340 | 482 | 1,030 | 1,850 | 2,920 | 6,090 | |
| 900 | 45 | 93 | 189 | 330 | 468 | 1,000 | 1,800 | 2,840 | 5,910 | |
| 950 | 44 | 90 | 183 | 320 | 454 | 970 | 1,750 | 2,750 | 5,730 | |
| 1,000 | 42 | 88 | 178 | 311 | 442 | 944 | 1,700 | 2,680 | 5,580 | |
| 1,100 | 40 | 83 | 169 | 296 | 420 | 896 | 1,610 | 2,540 | 5,300 | |
| 1,200 | 38 | 79 | 161 | 282 | 400 | 855 | 1,540 | 2,430 | 5,050 | |
| 1,300 | 37 | 76 | 155 | 270 | 383 | 819 | 1,470 | 2,320 | 4,840 | |
| 1,400 | 35 | 73 | 148 | 260 | 368 | 787 | 1,420 | 2,230 | 4,650 | |
| 1,500 | 34 | 70 | 143 | 250 | 355 | 758 | 1,360 | 2,150 | 4,480 | |
| 1,600 | 33 | 68 | 138 | 241 | 343 | 732 | 1,320 | 2,080 | 4,330 | |
| 1,700 | 32 | 66 | 134 | 234 | 331 | 708 | 1,270 | 2,010 | 4,190 | |
| 1,800 | 31 | 64 | 130 | 227 | 321 | 687 | 1,240 | 1,950 | 4,060 | |
| 1,900 | 30 | 62 | 126 | 220 | 312 | 667 | 1,200 | 1,890 | 3,940 | |
| 2,000 | 29 | 60 | 122 | 214 | 304 | 648 | 1,170 | 1,840 | 3,830 | |
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1-inch water column = 0.2488 kPa,
1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.
1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.
Notes:
| Gas | Undiluted Propane | |||||||||
| Inlet Pressure | 11.0 in. w.c. | |||||||||
| Pressure Drop | 0.5 in. w.c. | |||||||||
| Specific Gravity | 1.50 | |||||||||
| INTENDED USE | Sizing between single - or second-stage (low-pressure regulator) and appliance. | |||||||||
| TUBE SIZE (inches) | ||||||||||
| Nominal | K & L | ¼ | ⅜ | ½ | ⅝ | ¾ | 1 | 1¼ | 1½ | 2 |
| ACR | ⅜ | ½ | ⅝ | ¾ | ⅞ | 1⅛ | 1⅜ | - | - | |
| Outside | 0.375 | 0.500 | 0.625 | 0.750 | 0.875 | 1.125 | 1.375 | 1.625 | 2.125 | |
| Inside | 0.305 | 0.402 | 0.527 | 0.652 | 0.745 | 0.995 | 1.245 | 1.481 | 1.959 | |
| Length (ft) | Capacity in Cubic Feet of Gas per Hour | |||||||||
| 10 | 45 | 93 | 188 | 329 | 467 | 997 | 1,800 | 2,830 | 5,890 | |
| 20 | 31 | 64 | 129 | 226 | 321 | 685 | 1,230 | 1,950 | 4,050 | |
| 30 | 25 | 51 | 104 | 182 | 258 | 550 | 991 | 1,560 | 3,250 | |
| 40 | 21 | 44 | 89 | 155 | 220 | 471 | 848 | 1,340 | 2,780 | |
| 50 | 19 | 39 | 79 | 138 | 195 | 417 | 752 | 1,180 | 2,470 | |
| 60 | 17 | 35 | 71 | 125 | 177 | 378 | 681 | 1,070 | 2,240 | |
| 70 | 16 | 32 | 66 | 115 | 163 | 348 | 626 | 988 | 2,060 | |
| 80 | 15 | 30 | 61 | 107 | 152 | 324 | 583 | 919 | 1,910 | |
| 90 | 14 | 28 | 57 | 100 | 142 | 304 | 547 | 862 | 1,800 | |
| 100 | 13 | 27 | 54 | 95 | 134 | 287 | 517 | 814 | 1,700 | |
| 125 | 11 | 24 | 48 | 84 | 119 | 254 | 458 | 722 | 1,500 | |
| 150 | 10 | 21 | 44 | 76 | 108 | 230 | 415 | 654 | 1,360 | |
| 175 | NA | 20 | 40 | 70 | 99 | 212 | 382 | 602 | 1,250 | |
| 200 | NA | 18 | 37 | 65 | 92 | 197 | 355 | 560 | 1,170 | |
| 250 | NA | 16 | 33 | 58 | 82 | 175 | 315 | 496 | 1,030 | |
| 300 | NA | 15 | 30 | 52 | 74 | 158 | 285 | 449 | 936 | |
| 350 | NA | 14 | 28 | 48 | 68 | 146 | 262 | 414 | 861 | |
| 400 | NA | 13 | 26 | 45 | 63 | 136 | 244 | 385 | 801 | |
| 450 | NA | 12 | 24 | 42 | 60 | 127 | 229 | 361 | 752 | |
| 500 | NA | 11 | 23 | 40 | 56 | 120 | 216 | 341 | 710 | |
| 550 | NA | 11 | 22 | 38 | 53 | 114 | 205 | 324 | 674 | |
| 600 | NA | 10 | 21 | 36 | 51 | 109 | 196 | 309 | 643 | |
| 650 | NA | NA | 20 | 34 | 49 | 104 | 188 | 296 | 616 | |
| 700 | NA | NA | 19 | 33 | 47 | 100 | 180 | 284 | 592 | |
| 750 | NA | NA | 18 | 32 | 45 | 96 | 174 | 274 | 570 | |
| 800 | NA | NA | 18 | 31 | 44 | 93 | 168 | 264 | 551 | |
| 850 | NA | NA | 17 | 30 | 42 | 90 | 162 | 256 | 533 | |
| 900 | NA | NA | 17 | 29 | 41 | 87 | 157 | 248 | 5 17 | |
| 950 | NA | NA | 16 | 28 | 40 | 85 | 153 | 241 | 502 | |
| 1,000 | NA | NA | 16 | 27 | 39 | 83 | 149 | 234 | 488 | |
| 1,100 | NA | NA | 15 | 26 | 37 | 78 | 141 | 223 | 464 | |
| 1,200 | NA | NA | 14 | 25 | 35 | 75 | 135 | 212 | 442 | |
| 1,300 | NA | NA | 14 | 24 | 34 | 72 | 129 | 203 | 423 | |
| 1,400 | NA | NA | 13 | 23 | 32 | 69 | 124 | 195 | 407 | |
| 1,500 | NA | NA | 13 | 22 | 31 | 66 | 119 | 188 | 392 | |
| 1,600 | NA | NA | 12 | 21 | 30 | 64 | 115 | 182 | 378 | |
| 1,700 | NA | NA | 12 | 20 | 29 | 62 | 112 | 176 | 366 | |
| 1,800 | NA | NA | 11 | 20 | 28 | 60 | 108 | 170 | 355 | |
| 1,900 | NA | NA | 11 | 19 | 27 | 58 | 105 | 166 | 345 | |
| 2,000 | NA | NA | 11 | 19 | 27 | 57 | 102 | 161 | 335 | |
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1-inch water column = 0.2488 kPa,
1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.
1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.
Notes:
| Gas | Undiluted Propane | |||||||||
| Inlet Pressure | 2.0 psi | |||||||||
| Pressure Drop | 1.0 psi | |||||||||
| Specific Gravity | 1.50 | |||||||||
| INTENDED USE | Sizing between first stage (high-pressure regulator) and second stage (low-pressure regulator). | |||||||||
| TUBE SIZE (inches) | ||||||||||
| Nominal | K & L | ¼ | ⅜ | ½ | ⅝ | ¾ | 1 | 1¼ | 1½ | 2 |
| ACR | ⅜ | ½ | ⅝ | ¾ | ⅞ | 1⅛ | 1⅜ | - | - | |
| Outside | 0.375 | 0.500 | 0.625 | 0.750 | 0.875 | 1.125 | 1.375 | 1.625 | 2.125 | |
| Inside | 0.305 | 0.402 | 0.527 | 0.652 | 0.745 | 0.995 | 1.245 | 1.481 | 1.959 | |
| Length (ft) | Capacity in Cubic Feet of Gas per Hour | |||||||||
| 10 | 413 | 852 | 1,730 | 3,030 | 4,300 | 9,170 | 16,500 | 26,000 | 54,200 | |
| 20 | 284 | 585 | 1,190 | 2,080 | 2,950 | 6,310 | 11,400 | 17,900 | 37,300 | |
| 30 | 228 | 470 | 956 | 1,670 | 2,370 | 5,060 | 9,120 | 14,400 | 29,900 | |
| 40 | 195 | 402 | 818 | 1,430 | 2,030 | 4,330 | 7,800 | 12,300 | 25,600 | |
| 50 | 173 | 356 | 725 | 1,270 | 1,800 | 3,840 | 6,920 | 10,900 | 22,700 | |
| 60 | 157 | 323 | 657 | 1,150 | 1,630 | 3,480 | 6,270 | 9,880 | 20,600 | |
| 70 | 144 | 297 | 605 | 1,060 | 1,500 | 3,200 | 5,760 | 9,090 | 18,900 | |
| 80 | 134 | 276 | 562 | 983 | 1,390 | 2,980 | 5,360 | 8,450 | 17,600 | |
| 90 | 126 | 259 | 528 | 922 | 1,310 | 2,790 | 5,030 | 7,930 | 16,500 | |
| 100 | 119 | 245 | 498 | 871 | 1,240 | 2,640 | 4,750 | 7,490 | 15,600 | |
| 125 | 105 | 217 | 442 | 772 | 1,100 | 2,340 | 4,210 | 6,640 | 13,800 | |
| 150 | 95 | 197 | 400 | 700 | 992 | 2,120 | 3,820 | 6,020 | 12,500 | |
| 175 | 88 | 181 | 368 | 644 | 913 | 1,950 | 3,510 | 5,540 | 11,500 | |
| 200 | 82 | 168 | 343 | 599 | 849 | 1,810 | 3,270 | 5,150 | 10,700 | |
| 250 | 72 | 149 | 304 | 531 | 753 | 1,610 | 2,900 | 4,560 | 9,510 | |
| 300 | 66 | 135 | 275 | 481 | 682 | 1,460 | 2,620 | 4,140 | 8,610 | |
| 350 | 60 | 124 | 253 | 442 | 628 | 1,340 | 2,410 | 3,800 | 7,920 | |
| 400 | 56 | 116 | 235 | 411 | 584 | 1,250 | 2,250 | 3,540 | 7,370 | |
| 450 | 56 | 109 | 221 | 386 | 548 | 1,170 | 2,110 | 3,320 | 6,920 | |
| 500 | 50 | 103 | 209 | 365 | 517 | 1,110 | 1,990 | 3,140 | 6,530 | |
| 550 | 47 | 97 | 198 | 346 | 491 | 1,050 | 1,890 | 2,980 | 6,210 | |
| 600 | 45 | 93 | 189 | 330 | 469 | 1,000 | 1,800 | 2,840 | 5,920 | |
| 650 | 43 | 89 | 181 | 316 | 449 | 959 | 1,730 | 2,720 | 5,670 | |
| 700 | 41 | 86 | 174 | 304 | 431 | 921 | 1,660 | 2,620 | 5,450 | |
| 750 | 40 | 82 | 168 | 293 | 415 | 888 | 1,600 | 2,520 | 5,250 | |
| 800 | 39 | 80 | 162 | 283 | 401 | 857 | 1,540 | 2,430 | 5,070 | |
| 850 | 37 | 77 | 157 | 274 | 388 | 829 | 1,490 | 2,350 | 4,900 | |
| 900 | 36 | 75 | 152 | 265 | 376 | 804 | 1,450 | 2,280 | 4,750 | |
| 950 | 35 | 72 | 147 | 258 | 366 | 781 | 1,410 | 2,220 | 4,620 | |
| 1,000 | 34 | 71 | 143 | 251 | 356 | 760 | 1,370 | 2,160 | 4,490 | |
| 1,100 | 32 | 67 | 136 | 238 | 338 | 721 | 1,300 | 2,050 | 4,270 | |
| 1,200 | 31 | 64 | 130 | 227 | 322 | 688 | 1,240 | 1,950 | 4,070 | |
| 1,300 | 30 | 61 | 124 | 217 | 309 | 659 | 1,190 | 1,870 | 3,900 | |
| 1,400 | 28 | 59 | 120 | 209 | 296 | 633 | 1,140 | 1,800 | 3,740 | |
| 1,500 | 27 | 57 | 115 | 201 | 286 | 610 | 1,100 | 1,730 | 3,610 | |
| 1,600 | 26 | 55 | 111 | 194 | 276 | 589 | 1,060 | 1,670 | 3,480 | |
| 1,700 | 26 | 53 | 108 | 188 | 267 | 570 | 1,030 | 1,620 | 3,370 | |
| 1,800 | 25 | 51 | 104 | 182 | 259 | 553 | 1,000 | 1,570 | 3,270 | |
| 1,900 | 24 | 50 | 100 | 177 | 251 | 537 | 966 | 1,520 | 3,170 | |
| 2,000 | 23 | 48 | 99 | 172 | 244 | 522 | 940 | 1,480 | 3,090 | |
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1-inch water column = 0.2488 kPa,
1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.
1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.
Notes:
| Gas | Undiluted Propane | |||||||||||||
| Inlet Pressure | 11.0 in. w.c. | |||||||||||||
| Pressure Drop | 0.5 in. w.c. | |||||||||||||
| Specific Gravity | 1.50 | |||||||||||||
| INTENDED USE: SIZING BETWEEN SINGLE OR SECOND STAGE (Low Pressure) REGULATOR AND THE APPLIANCE SHUTOFF VALVE. | ||||||||||||||
| TUBE SIZE (EHD) | ||||||||||||||
| Flow Designation |
13 | 15 | 18 | 19 | 23 | 25 | 30 | 31 | 37 | 39 | 46 | 48 | 60 | 62 |
| Length (ft) | Capacity in Thousands of Btu per Hour | |||||||||||||
| 5 | 72 | 99 | 181 | 211 | 355 | 426 | 744 | 863 | 1,420 | 1,638 | 2,830 | 3,270 | 5,780 | 6,550 |
| 10 | 50 | 69 | 129 | 150 | 254 | 303 | 521 | 605 | 971 | 1,179 | 1,990 | 2,320 | 4,110 | 4,640 |
| 15 | 39 | 55 | 104 | 121 | 208 | 248 | 422 | 490 | 775 | 972 | 1,620 | 1,900 | 3,370 | 3,790 |
| 20 | 34 | 49 | 91 | 106 | 183 | 216 | 365 | 425 | 661 | 847 | 1,400 | 1,650 | 2,930 | 3,290 |
| 25 | 30 | 42 | 82 | 94 | 164 | 192 | 325 | 379 | 583 | 762 | 1,250 | 1,480 | 2,630 | 2,940 |
| 30 | 28 | 39 | 74 | 87 | 151 | 177 | 297 | 344 | 528 | 698 | 1,140 | 1,350 | 2,400 | 2,680 |
| 40 | 23 | 33 | 64 | 74 | 131 | 153 | 256 | 297 | 449 | 610 | 988 | 1,170 | 2,090 | 2,330 |
| 50 | 20 | 30 | 58 | 66 | 118 | 137 | 227 | 265 | 397 | 548 | 884 | 1,050 | 1,870 | 2,080 |
| 60 | 19 | 26 | 53 | 60 | 107 | 126 | 207 | 241 | 359 | 502 | 805 | 961 | 1,710 | 1,900 |
| 70 | 17 | 25 | 49 | 57 | 99 | 117 | 191 | 222 | 330 | 466 | 745 | 890 | 1,590 | 1,760 |
| 80 | 15 | 23 | 45 | 52 | 94 | 109 | 178 | 208 | 307 | 438 | 696 | 833 | 1,490 | 1,650 |
| 90 | 15 | 22 | 44 | 50 | 90 | 102 | 169 | 197 | 286 | 414 | 656 | 787 | 1,400 | 1,550 |
| 100 | 14 | 20 | 41 | 47 | 85 | 98 | 159 | 186 | 270 | 393 | 621 | 746 | 1,330 | 1,480 |
| 150 | 11 | 15 | 31 | 36 | 66 | 75 | 123 | 143 | 217 | 324 | 506 | 611 | 1,090 | 1,210 |
| 200 | 9 | 14 | 28 | 33 | 60 | 69 | 112 | 129 | 183 | 283 | 438 | 531 | 948 | 1,050 |
| 250 | 8 | 12 | 25 | 30 | 53 | 61 | 99 | 117 | 163 | 254 | 390 | 476 | 850 | 934 |
| 300 | 8 | 11 | 23 | 26 | 50 | 57 | 90 | 107 | 147 | 234 | 357 | 434 | 777 | 854 |
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1-inch water column = 0.2488 kPa,
1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.
1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.
Notes:
- Table includes losses for four 90-degree bends and two end fittings. Tubing runs with larger numbers of bends or fittings shall be increased by an equivalent length of tubing to the following equation: L = 1.3n, where L is additional length (feet) of tubing and n is the number of additional fittings or bends.
- EHD-Equivalent Hydraulic Diameter, which is a measure of the relative hydraulic efficiency between different tubing sizes. The greater the value of EHD, the greater the gas capacity of the tubing.
- All table entries have been rounded to three significant digits.
| Gas | Undiluted Propane | |||||||||||||
| Inlet Pressure | 2.0 psi | |||||||||||||
| Pressure Drop | 1.0 psi | |||||||||||||
| Specific Gravity | 1.50 | |||||||||||||
| INTENDED USE: SIZING BETWEEN 2 PSI SERVICE AND THE LINE PRESSURE REGULATOR. | ||||||||||||||
| TUBE SIZE (EHD) | ||||||||||||||
| Flow Designation |
13 | 15 | 18 | 19 | 23 | 25 | 30 | 31 | 37 | 39 | 46 | 48 | 60 | 62 |
| Length (ft) | Capacity in Thousands of Btu per Hour | |||||||||||||
| 25 | 262 | 347 | 591 | 701 | 1,120 | 1,380 | 2,560 | 2,950 | 4,560 | 5,147 | 9,550 | 10,700 | 18,800 | 21,700 |
| 30 | 238 | 316 | 540 | 640 | 1,030 | 1,270 | 2,330 | 2,690 | 4,180 | 4,719 | 8,710 | 9,790 | 17,200 | 19,800 |
| 40 | 203 | 271 | 469 | 554 | 896 | 1,100 | 2,010 | 2,320 | 3,630 | 4,116 | 7,530 | 8,500 | 14,900 | 17,200 |
| 50 | 181 | 243 | 420 | 496 | 806 | 986 | 1,790 | 2,070 | 3,260 | 3,702 | 6,730 | 7,610 | 13,400 | 15,400 |
| 75 | 147 | 196 | 344 | 406 | 663 | 809 | 1,460 | 1,690 | 2,680 | 3,053 | 5,480 | 6,230 | 11,000 | 12,600 |
| 80 | 140 | 189 | 333 | 393 | 643 | 768 | 1,410 | 1,630 | 2,590 | 2,961 | 5,300 | 6,040 | 10,600 | 12,200 |
| 100 | 124 | 169 | 298 | 350 | 578 | 703 | 1,260 | 1,450 | 2,330 | 2,662 | 4,740 | 5,410 | 9,530 | 10,900 |
| 150 | 101 | 137 | 245 | 287 | 477 | 575 | 1,020 | 1,180 | 1,910 | 2,195 | 3,860 | 4,430 | 7,810 | 8,890 |
| 200 | 86 | 118 | 213 | 248 | 415 | 501 | 880 | 1,020 | 1,660 | 1,915 | 3,340 | 3,840 | 6,780 | 7,710 |
| 250 | 77 | 105 | 191 | 222 | 373 | 448 | 785 | 910 | 1,490 | 1,722 | 2,980 | 3,440 | 6,080 | 6,900 |
| 300 | 69 | 96 | 173 | 203 | 343 | 411 | 716 | 829 | 1,360 | 1,578 | 2,720 | 3,150 | 5,560 | 6,300 |
| 400 | 60 | 82 | 151 | 175 | 298 | 355 | 616 | 716 | 1,160 | 1,376 | 2,350 | 2,730 | 4,830 | 5,460 |
| 500 | 53 | 72 | 135 | 158 | 268 | 319 | 550 | 638 | 1,030 | 1,237 | 2,100 | 2,450 | 4,330 | 4,880 |
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1-inch water column = 0.2488 kPa,
1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.
1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.
Notes:
- Table does not include effect of pressure drop across the line regulator. Where regulator loss exceeds ½ psi (based on 13 in. w.c. outlet pressure), DO NOT USE THIS TABLE. Consult with the regulator manufacturer for pressure drops and capacity factors. Pressure drops across a regulator can vary with flow rate.
- CAUTION: Capacities shown in the table might exceed maximum capacity for a selected regulator. Consult with the regulator or tubing manufacturer for guidance.
- Table includes losses for four 90-degree bends and two end fittings. Tubing runs with larger numbers of bends or fittings shall be increased by an equivalent length of tubing to the following equation: L = 1.3n, where L is additional length (feet) of tubing and n is the number of additional fittings or bends.
- EHD-Equivalent Hydraulic Diameter, which is a measure of the relative hydraulic efficiency between different tubing sizes. The greater the value of EHD, the greater the gas capacity of the tubing.
- All table entries have been rounded to three significant digits.
| Gas | Undiluted Propane | |||||||||||||
| Inlet Pressure | 5.0 psi | |||||||||||||
| Pressure Drop | 3.5 psi | |||||||||||||
| Specific Gravity | 1.50 | |||||||||||||
| TUBE SIZE (EHD) | ||||||||||||||
| Flow Designation |
13 | 15 | 18 | 19 | 23 | 25 | 30 | 31 | 37 | 39 | 46 | 48 | 60 | 62 |
| Length (ft) | Capacity in Thousands of Btu per Hour | |||||||||||||
| 10 | 826 | 1,070 | 1,710 | 2,060 | 3,150 | 4,000 | 7,830 | 8,950 | 13,100 | 14,441 | 28,600 | 31,200 | 54,400 | 63,800 |
| 25 | 509 | 664 | 1,090 | 1,310 | 2,040 | 2,550 | 4,860 | 5,600 | 8,400 | 9,339 | 18,000 | 19,900 | 34,700 | 40,400 |
| 30 | 461 | 603 | 999 | 1,190 | 1,870 | 2,340 | 4,430 | 5,100 | 7,680 | 8,564 | 16,400 | 18,200 | 31,700 | 36,900 |
| 40 | 396 | 520 | 867 | 1,030 | 1,630 | 2,030 | 3,820 | 4,400 | 6,680 | 7,469 | 14,200 | 15,800 | 27,600 | 32,000 |
| 50 | 352 | 463 | 777 | 926 | 1,460 | 1,820 | 3,410 | 3,930 | 5,990 | 6,717 | 12,700 | 14,100 | 24,700 | 28,600 |
| 75 | 284 | 376 | 637 | 757 | 1,210 | 1,490 | 2,770 | 3,190 | 4,920 | 5,539 | 10,300 | 11,600 | 20,300 | 23,400 |
| 80 | 275 | 363 | 618 | 731 | 1,170 | 1,450 | 2,680 | 3,090 | 4,770 | 5,372 | 9,990 | 11,200 | 19,600 | 22,700 |
| 100 | 243 | 324 | 553 | 656 | 1,050 | 1,300 | 2,390 | 2,760 | 4,280 | 4,830 | 8,930 | 10,000 | 17,600 | 20,300 |
| 150 | 196 | 262 | 453 | 535 | 866 | 1,060 | 1,940 | 2,240 | 3,510 | 3,983 | 7,270 | 8,210 | 14,400 | 16,600 |
| 200 | 169 | 226 | 393 | 464 | 755 | 923 | 1,680 | 1,930 | 3,050 | 3,474 | 6,290 | 7,130 | 12,500 | 14,400 |
| 250 | 150 | 202 | 352 | 415 | 679 | 828 | 1,490 | 1,730 | 2,740 | 3,124 | 5,620 | 6,390 | 11,200 | 12,900 |
| 300 | 136 | 183 | 322 | 379 | 622 | 757 | 1,360 | 1,570 | 2,510 | 2,865 | 5,120 | 5,840 | 10,300 | 11,700 |
| 400 | 117 | 158 | 279 | 328 | 542 | 657 | 1,170 | 1,360 | 2,180 | 2,498 | 4,430 | 5,070 | 8,920 | 10,200 |
| 500 | 104 | 140 | 251 | 294 | 488 | 589 | 1,050 | 1,210 | 1,950 | 2,247 | 3,960 | 4,540 | 8,000 | 9,110 |
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1-inch water column = 0.2488 kPa,
1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.
1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.
Notes:
- Table does not include effect of pressure drop across the line regulator. Where regulator loss exceeds 1 psi, DO NOT USE THIS TABLE. Consult with the regulator manufacturer for pressure drops and capacity factors. Pressure drops across a regulator can vary with flow rate.
- CAUTION: Capacities shown in the table might exceed maximum capacity for a selected regulator. Consult with the regulator or tubing manufacturer for guidance.
- Table includes losses for four 90-degree bends and two end fittings. Tubing runs with larger numbers of bends or fittings shall be increased by an equivalent length of tubing to the following equation: L = 1.3n, where L is additional length (feet) of tubing and n is the number of additional fittings or bends.
- EHD-Equivalent Hydraulic Diameter, which is a measure of the relative hydraulic efficiency between different tubing sizes. The greater the value of EHD, the greater the gas capacity of the tubing.
- All table entries have been rounded to three significant digits.
| Gas | Undiluted Propane | |||||
| Inlet Pressure | 11.0 in. w.c. | |||||
| Pressure Drop | 0.5 in. w.c. | |||||
| Specific Gravity | 1.50 | |||||
| INTENDED USE | PE pipe sizing between integral 2-stage regulator at tank or second stage (low-pressure regulator) and building. | |||||
| PIPE SIZE (inches) | ||||||
| Nominal OD | ½ | ¾ | 1 | 1¼ | 1½ | 2 |
| Designation | SDR 9 | SDR 11 |
SDR 11 |
SDR 10 |
SDR 11 | SDR 11 |
| Actual ID | 0.660 | 0.860 | 1.077 | 1.328 | 1.554 | 1.943 |
| Length (ft) | Capacity in Thousands of Btu per Hour | |||||
| 10 | 340 | 680 | 1,230 | 2,130 | 3,210 | 5,770 |
| 20 | 233 | 468 | 844 | 1,460 | 2,210 | 3,970 |
| 30 | 187 | 375 | 677 | 1,170 | 1,770 | 3,180 |
| 40 | 160 | 321 | 580 | 1,000 | 1,520 | 2,730 |
| 50 | 142 | 285 | 514 | 890 | 1,340 | 2,420 |
| 60 | 129 | 258 | 466 | 807 | 1,220 | 2,190 |
| 70 | 119 | 237 | 428 | 742 | 1,120 | 2,010 |
| 80 | 110 | 221 | 398 | 690 | 1,040 | 1,870 |
| 90 | 103 | 207 | 374 | 648 | 978 | 1,760 |
| 100 | 98 | 196 | 353 | 612 | 924 | 1,660 |
| 125 | 87 | 173 | 313 | 542 | 819 | 1,470 |
| 150 | 78 | 157 | 284 | 491 | 742 | 1,330 |
| 175 | 72 | 145 | 261 | 452 | 683 | 1,230 |
| 200 | 67 | 135 | 243 | 420 | 635 | 1,140 |
| 250 | 60 | 119 | 215 | 373 | 563 | 1,010 |
| 300 | 54 | 108 | 195 | 338 | 510 | 916 |
| 350 | 50 | 99 | 179 | 311 | 469 | 843 |
| 400 | 46 | 92 | 167 | 289 | 436 | 784 |
| 450 | 43 | 87 | 157 | 271 | 409 | 736 |
| 500 | 41 | 82 | 148 | 256 | 387 | 695 |
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1-inch water column = 0.2488 kPa,
1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.
1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.
Note: All table entries have been rounded to three significant digits.
| Gas | Undiluted Propane | |||||
| Inlet Pressure | 2.0 psi | |||||
| Pressure Drop | 1.0 psi | |||||
| Specific Gravity | 1.50 | |||||
| INTENDED USE | PE pipe sizing between 2 psig service regulator and line pressure regulator. | |||||
| PIPE SIZE (inches) | ||||||
| Nominal OD | ½ | ¾ | 1 | 1¼ | 1½ | 2 |
| Designation | SDR 9 | SDR 11 |
SDR 11 |
SDR 10 |
SDR 11 | SDR 11 |
| Actual ID | 0.660 | 0.860 | 1.077 | 1.328 | 1.554 | 1.943 |
| Length (ft) | Capacity in Thousands of Btu per Hour | |||||
| 10 | 3,130 | 6,260 | 11,300 | 19,600 | 29,500 | 53,100 |
| 20 | 2,150 | 4,300 | 7,760 | 13,400 | 20,300 | 36,500 |
| 30 | 1,730 | 3,450 | 6,230 | 10,800 | 16,300 | 29,300 |
| 40 | 1,480 | 2,960 | 5,330 | 9,240 | 14,000 | 25,100 |
| 50 | 1,310 | 2,620 | 4,730 | 8,190 | 12,400 | 22,200 |
| 60 | 1,190 | 2,370 | 4,280 | 7,420 | 11,200 | 20,100 |
| 70 | 1,090 | 2,180 | 3,940 | 6,830 | 10,300 | 18,500 |
| 80 | 1,010 | 2,030 | 3,670 | 6,350 | 9,590 | 17,200 |
| 90 | 952 | 1,910 | 3,440 | 5,960 | 9,000 | 16,200 |
| 100 | 899 | 1,800 | 3,250 | 5,630 | 8,500 | 15,300 |
| 125 | 797 | 1,600 | 2,880 | 4,990 | 7,530 | 13,500 |
| 150 | 722 | 1,450 | 2,610 | 4,520 | 6,830 | 12,300 |
| 175 | 664 | 1,330 | 2,400 | 4,160 | 6,280 | 11,300 |
| 200 | 618 | 1,240 | 2,230 | 3,870 | 5,840 | 10,500 |
| 250 | 548 | 1,100 | 1,980 | 3,430 | 5,180 | 9,300 |
| 300 | 496 | 994 | 1,790 | 3,110 | 4,690 | 8,430 |
| 350 | 457 | 914 | 1,650 | 2,860 | 4,320 | 7,760 |
| 400 | 425 | 851 | 1,530 | 2,660 | 4,020 | 7,220 |
| 450 | 399 | 798 | 1,440 | 2,500 | 3,770 | 6,770 |
| 500 | 377 | 754 | 1,360 | 2,360 | 3,560 | 6,390 |
| 550 | 358 | 716 | 1,290 | 2,240 | 3,380 | 6,070 |
| 600 | 341 | 683 | 1,230 | 2,140 | 3,220 | 5,790 |
| 650 | 327 | 654 | 1,180 | 2,040 | 3,090 | 5,550 |
| 700 | 314 | 628 | 1,130 | 1,960 | 2,970 | 5,330 |
| 750 | 302 | 605 | 1,090 | 1,890 | 2,860 | 5,140 |
| 800 | 292 | 585 | 1,050 | 1,830 | 2,760 | 4,960 |
| 850 | 283 | 566 | 1,020 | 1,770 | 2,670 | 4,800 |
| 900 | 274 | 549 | 990 | 1,710 | 2,590 | 4,650 |
| 950 | 266 | 533 | 961 | 1,670 | 2,520 | 4,520 |
| 1,000 | 259 | 518 | 935 | 1,620 | 2,450 | 4,400 |
| 1,100 | 246 | 492 | 888 | 1,540 | 2,320 | 4,170 |
| 1,200 | 234 | 470 | 847 | 1,470 | 2,220 | 3,980 |
| 1,300 | 225 | 450 | 811 | 1,410 | 2,120 | 3,8 10 |
| 1,400 | 216 | 432 | 779 | 1,350 | 2,040 | 3,660 |
| 1,500 | 208 | 416 | 751 | 1,300 | 1,960 | 3,530 |
| 1,600 | 201 | 402 | 725 | 1,260 | 1,900 | 3,410 |
| 1,700 | 194 | 389 | 702 | 1,220 | 1,840 | 3,300 |
| 1,800 | 188 | 377 | 680 | 1,180 | 1,780 | 3,200 |
| 1,900 | 183 | 366 | 661 | 1,140 | 1,730 | 3,110 |
| 2,000 | 178 | 356 | 643 | 1,110 | 1,680 | 3,020 |
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1-inch water column = 0.2488 kPa,
1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.
1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.
Note: All table entries have been rounded to three significant digits.
| Gas | Undiluted Propane | |
| Inlet Pressure | 11.0 in. w.c. | |
| Pressure Drop | 0.5 in. w.c. | |
| Specific Gravity | 1.50 | |
| INTENDED USE: PE PIPE SIZING BETWEEN INTEGRAL 2-STAGE REGULATOR AT TANK OR SECOND STAGE (low-pressure regulator) AND BUILDING. | ||
| Plastic Tubing Size (CTS) (inch) | ||
| Nominal OD | ½ | 2 |
| Designation | SDR 7 |
SDR 11 |
| Actual ID | 0.445 | 0.927 |
| Length (ft) | Capacity in Cubic Feet of Gas per Hour | |
| 10 | 121 | 828 |
| 20 | 83 | 569 |
| 30 | 67 | 457 |
| 40 | 57 | 391 |
| 50 | 51 | 347 |
| 60 | 46 | 314 |
| 70 | 42 | 289 |
| 80 | 39 | 269 |
| 90 | 37 | 252 |
| 100 | 35 | 238 |
| 125 | 31 | 211 |
| 150 | 28 | 191 |
| 175 | 26 | 176 |
| 200 | 24 | 164 |
| 225 | 22 | 154 |
| 250 | 21 | 145 |
| 275 | 20 | 138 |
| 300 | 19 | 132 |
| 350 | 18 | 121 |
| 400 | 16 | 113 |
| 450 | 15 | 106 |
| 500 | 15 | 100 |
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1-inch water column = 0.2488 kPa,
1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.
1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.
Note: All table entries have been rounded to three significant digits.
The pipe
size of each section of gas piping shall be determined
using the longest length of piping from the point of delivery
to the most remote outlet and the load of the section.
Pipe shall
be sized as follows:
- Pipe size of each section of the longest pipe run from the point of delivery to the most remote outlet shall be determined using the longest run of piping and the load of the section.
- The pipe size of each section of branch piping not previously sized shall be determined using the length of piping from the point of delivery to the most remote outlet in each branch and the load of the section.
The pipe size for
each section of higher pressure gas piping shall be determined
using the longest length of piping from the point of
delivery to the most remote line pressure regulator. The
pipe size from the line pressure regulator to each outlet
shall be determined using the length of piping from the regulator
to the most remote outlet served by the regulator.
The design pressure
loss in any piping system under maximum probable flow
conditions, from the point of delivery to the inlet connection
of the appliance, shall be such that the supply pressure at the
appliance is greater than or equal to the minimum pressure
required by the appliance.
The
maximum design operating pressure for piping systems
located inside buildings shall not exceed 5 pounds per square
inch gauge (psig) (34 kPa gauge) except where one or more
of the following conditions are met:
- The piping system is welded.
- The piping is located in a ventilated chase or otherwise enclosed for protection against accidental gas accumulation.
- The piping is a temporary installation for buildings under construction.
LP-gas systems designed to operate below -5°F (-21°C) or
with butane or a propane-butane mix shall be designed to
either accommodate liquid LP-gas or prevent LP-gas
vapor from condensing into a liquid.
Materials used for piping systems
shall comply with the requirements of this chapter or shall be
approved.
Material not covered by
the standards specifications listed herein shall be investigated
and tested to determine that it is safe and suitable for the proposed
service, and, in addition, shall be recommended for that
service by the manufacturer and shall be approved by the
code official.
Metallic pipe shall comply
with Sections 02414.4.1 and 02414.4.2.
Cast-iron pipe shall not be
used.
Steel and wrought-iron pipe
shall be at least of standard weight (Schedule 40) and shall
comply with one of the following standards:
- ASME B 36.10, 10M.
- ASTM A53/A 53M.
- ASTM A106.
Seamless copper, aluminum
alloy and steel tubing shall not be used with gases corrosive
to such materials.
Steel tubing shall comply
with ASTM A254.
Copper
tubing shall comply with Standard Type K or L of
ASTM B88 or ASTM B280.
Copper and copper alloy tubing shall not be used if the gas contains more than an average of 0.3 grains of hydrogen sulfide per 100 standard cubic feet of gas (0.7 milligrams per 100 liters).
Copper and copper alloy tubing shall not be used if the gas contains more than an average of 0.3 grains of hydrogen sulfide per 100 standard cubic feet of gas (0.7 milligrams per 100 liters).
Corrugated stainless steel tubing shall be listed in accordance
with ANSI LC 1/CSA 6.26.
Polyethylene
plastic pipe, tubing and fittings used to supply fuel gas
shall conform to ASTM D2513. Such pipe shall be marked
"Gas" and "ASTM D2513."
Plastic pipe, tubing and fittings, other than polyethylene, shall be identified and conform to the 2008 edition of ASTM D2513. Such pipe shall be marked "Gas" and "ASTM D2513."
Polyvinyl chloride (PVC) and chlorinated polyvinyl chloride (CPVC) plastic pipe, tubing and fittings shall not be used to supply fuel gas.
Plastic pipe, tubing and fittings, other than polyethylene, shall be identified and conform to the 2008 edition of ASTM D2513. Such pipe shall be marked "Gas" and "ASTM D2513."
Polyvinyl chloride (PVC) and chlorinated polyvinyl chloride (CPVC) plastic pipe, tubing and fittings shall not be used to supply fuel gas.
Plastic pipe, tubing
and anodeless risers shall comply with the following:
- Factory-assembled anodeless risers shall be recommended by the manufacturer for the gas used and shall be leak tested by the manufacturer in accordance with written procedures.
- Service head adapters and field-assembled anodeless risers incorporating service head adapters shall be recommended by the manufacturer for the gas used, and shall be designed and certified to meet the requirements of Category I of ASTM D2513, and U.S. Department of Transportation, Code of Federal Regulations, Title 49, Part 192.281(e). The manufacturer shall provide the user with qualified installation instructions as prescribed by the U.S. Department of Transportation, Code of Federal Regulations, Title 49, Part 192.283(b).
Pipe, tubing
and fittings shall be clear and free from cutting burrs and
defects in structure or threading, and shall be thoroughly
brushed, and chip and scale blown.
Defects in pipe or tubing or fittings shall not be repaired. Defective pipe, tubing or fittings shall be replaced. (See Section G2417.1.2.)
Defects in pipe or tubing or fittings shall not be repaired. Defective pipe, tubing or fittings shall be replaced. (See Section G2417.1.2.)
Where in contact with
material or atmosphere exerting a corrosive action, metallic piping
and fittings coated with a corrosion-resistant material shall
be used. External or internal coatings or linings used on piping
or components shall not be considered as adding strength.
Field threading
of metallic pipe shall be in accordance with Table
G2414.9.2.
For SI: 1 inch= 25.4 mm.
| IRON PIPE SIZE (inches) |
APPROXIMATE LENGTH OF THREADED PORTION (inches) |
APPROXIMATE NO. OF THREADS TO BE CUT |
|---|---|---|
| ½ | ¾ | 10 |
| ¾ | ¾ | 10 |
| 1 | ⅞ | 10 |
| 1¼ | 1 | 11 |
| 1½ | 1 | 11 |
Thread
joint compounds shall be resistant to the action of liquefied
petroleum gas or to any other chemical constituents of
the gases to be conducted through the piping.
The
type of piping joint used shall be suitable for the pressuretemperature
conditions and shall be selected giving consideration
to joint tightness and mechanical strength under the service
conditions. The joint shall be able to sustain the
maximum end force caused by the internal pressure and any
additional forces due to temperature expansion or contraction,
vibration, fatigue, or to the weight of the pipe and its
contents.
Flared joints shall
be used only in systems constructed from nonferrous pipe
and tubing where experience or tests have demonstrated
that the joint is suitable for the conditions and where provisions
are made in the design to prevent separation of the
joints.
Metallic fittings,
shall comply with the following:
- Fittings used with steel or wrought-iron pipe shall be steel, copper alloy, malleable iron or cast iron.
- Fittings used with copper or copper alloy pipe shall be copper or copper alloy.
- Cast-iron bushings shall be prohibited.
- Special fittings. Fittings such as couplings, proprietary-type joints, saddle tees, gland-type compression fittings, and flared, flareless and compression-type tubing fittings shall be: used within the fitting manufacturer's pressure-temperature recommendations; used within the service conditions anticipated with respect to vibration, fatigue, thermal expansion and contraction; and shall be approved.
- Where pipe fittings are drilled and tapped in the
field, the operation shall be in accordance with all of
the following:
- The operation shall be performed on systems having operating pressures of 5 psi (34.5 kPa) or less.
- The operation shall be performed by the gas supplier or the gas supplier's designated representative.
- The drilling and tapping operation shall be performed in accordance with written procedures prepared by the gas supplier.
- The fittings shall be located outdoors.
- The tapped fitting assembly shall be inspected and proven to be free of leakage.
Plastic
pipe, tubing and fittings shall be joined in accordance with
the manufacturers' instructions. Such joints shall comply
with the following:
- The joints shall be designed and installed so that the longitudinal pull-out resistance of the joints will be at least equal to the tensile strength of the plastic piping material.
- Heat-fusion joints shall be made in accordance with qualified procedures that have been established and proven by test to produce gas-tight joints at least as strong as the pipe or tubing being joined. Joints shall be made with the joining method recommended by the pipe manufacturer. Heat fusion fittings shall be marked "ASTM D2513."
- Where compression-type mechanical joints are used, the gasket material in the fitting shall be compatible with the plastic piping and with the gas distributed by the system. An internal tubular rigid stiffener shall be used in conjunction with the fitting. The stiffener shall be flush with the end of the pipe or tubing and shall extend at least to the outside end of the compression fitting when installed. The stiffener shall be free of rough or sharp edges and shall not be a force fit in the plastic. Split tubular stiffeners shall not be used.
- Plastic piping joints and fittings for use in liquefied petroleum gas piping systems shall be in accordance with NFPA 58.
Materials used
shall be installed in strict accordance with the standards under
which the materials are accepted and approved. In the
absence of such installation procedures, the manufacturer's
instructions shall be followed. Where the requirements of referenced
standards or manufacturer's instructions do not conform
to minimum provisions of this code, the provisions of
this code shall apply.
CSST piping systems shall be
installed in accordance with the terms of their approval, the
conditions of listing, the manufacturer's instructions and this
code.
Piping shall not be
installed in or through a ducted supply, return or exhaust, or a
clothes chute, chimney or gas vent, dumbwaiter or elevator
shaft. Piping installed downstream of the point of delivery
shall not extend through any townhouse unit other than the
unit served by such piping.
Fittings
installed in concealed locations shall be limited to the following
types:
- Threaded elbows, tees and couplings.
- Brazed fittings.
- Welded fittings.
- Fittings listed to ANSI LC-1/CSA 6.26 or ANSI LC-4.
Gas piping shall not penetrate building foundation walls at
any point below grade. Gas piping shall enter and exit a
building at a point above grade and the annular space
between the
pipe
and the wall shall be sealed.
Where piping is installed through holes or notches
in framing members and the piping is located less than 1½
inches (38 mm) from the framing member face to which
wall, ceiling or floor membranes will be attached, the pipe
shall be protected by shield plates that cover the width of
the pipe and the framing member and that extend not less
than 4 inches (51 mm) to each side of the framing member.
Where the framing member that the piping passes through
is a bottom plate, bottom track, top plate or top track, the
shield plates shall cover the framing member and extend
not less than 4 inches (51 mm) above the bottom framing
member and not less than 4 inches (51 mm) below the top
framing member.
Where the piping is located within a framing member and
is less than 1½ inches (38 mm) from the framing member
face to which wall, ceiling or floor membranes will be
attached, the piping shall be protected by shield plates that
cover the width and length of the piping. Where the piping
is located outside of a framing member and is located less
than 1½ inches (38 mm) from the nearest edge of the face
of the framing member to which the membrane will be
attached, the piping shall be protected by shield plates that
cover the width and length of the piping.
Shield plates shall be of
steel material having a thickness of not less than 0.0575
inch (1.463 mm) (No. 16 gage).
Piping in solid floors
shall be laid in channels in the floor and covered in a manner
that will allow access to the piping with a minimum amount
of damage to the building. Where such piping is subject to
exposure to excessive moisture or corrosive substances, the
piping shall be protected in an approved manner. As an alternative to installation in channels, the piping shall be installed
in a conduit of Schedule 40 steel, wrought iron, PVC or ABS
pipe in accordance with Section G2415.6.1 or G2415.6.2.
The conduit shall extend into an occupiable portion
of the building and, at the point where the conduit terminates
in the building, the space between the conduit and
the gas piping shall be sealed to prevent the possible entrance
of any gas leakage. The conduit shall extend not less than 2
inches (51 mm) beyond the point where the pipe emerges
from the floor. If the end sealing is capable of withstanding
the full pressure of the gas pipe, the conduit shall be designed
for the same pressure as the pipe. Such conduit shall extend
not less than 4 inches (102 mm) outside the building, shall be
vented above grade to the outdoors and shall be installed to
prevent the entrance of water and insects.
Where the conduit originates and terminates
within the same building, the conduit shall originate and
terminate in an accessible portion of the building and shall
not be sealed. The conduit shall extend not less than 2
inches (51 mm) beyond the point where the pipe emerges
from the floor.
Piping
installed outdoors shall be elevated not less than 3½ inches
(152 mm) above ground and where installed across roof surfaces,
shall be elevated not less than 3½ inches (152 mm)
above the roof surface. Piping installed above ground, outdoors,
and installed across the surface of roofs shall be
securely supported and located where it will be protected from
physical damage. Where passing through an outside wall, the
piping shall also be protected against corrosion by coating or
wrapping with an inert material. Where piping is encased in a
protective pipe sleeve, the annular space between the piping
and the sleeve shall be sealed.
Metallic piping and metallic
tubing that conveys fuel gas from an LP-gas storage container
shall be provided with an approved dielectric fitting to electrically
isolate the underground portion of the pipe or tube
from the above ground portion that enters a building. Such
dielectric fitting shall be installed above ground outdoors.
Metallic
pipe or tubing exposed to corrosive action, such as soil condition
or moisture, shall be protected in an approved manner.
Zinc coatings (galvanizing) shall not be deemed adequate
protection for gas piping underground. Where dissimilar metals
are joined underground, an insulating coupling or fitting
shall be used. Piping shall not be laid in contact with cinders.
Uncoated
threaded or socket-welded joints shall not be used in piping
in contact with soil or where internal or external crevice
corrosion is known to occur.
Pipe protective coatings and wrappings shall be
approved for the application and shall be factory applied.
Exception: Where installed in accordance with the
manufacturer's instructions, field application of coatings and wrappings shall be permitted for pipe nipples,
fittings and locations where the factory coating or
wrapping has been damaged or necessarily removed at
joints.
Underground
piping systems shall be installed a minimum depth of 12
inches (305 mm) below grade, except as provided for in Section
G2415.12.1.
Individual lines to outdoor lights, grills or other appliances
shall be installed not less than 8 inches (203 mm)
below finished grade, provided that such installation is
approved and is installed in locations not susceptible to
physical damage.
The trench shall be graded so
that the pipe has a firm, substantially continuous bearing on
the bottom of the trench.
Piping installed underground beneath buildings is prohibited
except where the piping is encased in a conduit of wrought
iron, plastic pipe, steel pipe or other approved conduit material
designed to withstand the superimposed loads. The conduit
shall be protected from corrosion in accordance with
Section G2415.11 and shall be installed in accordance with
Section G2415.14.1 or G2415.14.2.
The conduit shall extend into an occupiable
portion of the building and, at the point where the conduit
terminates in the building, the space between the conduit
and the gas piping shall be sealed to prevent the possible
entrance of any gas leakage. The conduit shall extend not
less than 2 inches (51 mm) beyond the point where the
pipe emerges from the floor. Where the end sealing is
capable of withstanding the full pressure of the gas pipe,
the conduit shall be designed for the same pressure as the
pipe. Such conduit shall extend not less than 4 inches (102
mm) outside the building, shall be vented above grade to
the outdoors and shall be installed so as to prevent the
entrance of water and insects.
Where the conduit originates and terminates
within the same building, the conduit shall originate
and terminate in an accessible portion of the building and
shall not be sealed. The conduit shall extend not less than
2 inches (51 mm) beyond the point where the pipe
emerges from the floor.
The unthreaded portion
of piping outlets shall extend not less than 1 inch (25 mm)
through finished ceilings and walls and where extending
through floors, outdoor patios and slabs, shall not be less than
2 inches (51 mm) above them. The outlet fitting or piping shall be securely supported. Outlets shall not be placed
behind doors. Outlets shall be located in the room or space
where the appliance is installed.
Plastic pipe shall be
installed outdoors underground only. Plastic pipe shall not
be used within or under any building or slab or be operated
at pressures greater than 100 psig (689 kPa) for natural gas
or 30 psig (207 kPa) for LP-gas.
Exceptions:
Exceptions:
- Plastic pipe shall be permitted to terminate above ground outside of buildings where installed in premanufactured anodeless risers or service head adapter risers that are installed in accordance with the manufacturer's instructions.
- Plastic pipe shall be permitted to terminate with a wall head adapter within buildings where the plastic pipe is inserted in a piping material for fuel gas use in buildings.
- Plastic pipe shall be permitted under outdoor patio, walkway and driveway slabs provided that the burial depth complies with Section G2415.10.
Connections outdoors
and underground between metallic and plastic piping
shall be made only with transition fittings conforming
to ASTM D2513 Category I or ASTM F1973.
A yellow insulated copper
tracer wire or other approved conductor shall be installed
adjacent to underground nonmetallic piping. Access shall
be provided to the tracer wire or the tracer wire shall terminate
above ground at each end of the nonmetallic piping.
The tracer wire size shall not be less than 18 AWG
and the insulation type shall be suitable for direct burial.
The use of a flammable or
combustible gas to clean or remove debris from a piping system
shall be prohibited.
A device shall not be
placed inside the piping or fittings that will reduce the cross-sectional
area or otherwise obstruct the free flow of gas.
Exceptions:
Exceptions:
- Approved gas filters.
- An approved fitting or device where the gas piping system has been sized to accommodate the pressure drop of the fitting or device.
Before any system of
piping is put in service or concealed, it shall be tested to
ensure that it is gas tight. Testing, inspection and purging of
piping systems shall comply with Section G2417.
Metallic pipe bends shall
comply with the following:
- Bends shall be made only with bending tools and procedures intended for that purpose.
- All bends shall be smooth and free from buckling, cracks or other evidence of mechanical damage.
- The longitudinal weld of the pipe shall be near the neutral axis of the bend.
- Pipe shall not be bent through an arc of more than 90 degrees (1.6 rad).
- The inside radius of a bend shall be not less than six times the outside diameter of the pipe.
Plastic pipe bends shall comply
with the following.
- The pipe shall not be damaged and the internal diameter of the pipe shall not be effectively reduced.
- Joints shall not be located in pipe bends
- The radius of the inner curve of such bends shall not be less than 25 times the inside diameter of the pipe.
- Where the piping manufacturer specifies the use of special bending tools or procedures, such tools or procedures shall be used.
Prior to acceptance and initial
operation, all piping installations shall be visually inspected
and pressure tested to determine that the materials, design,
fabrication and installation practices comply with the requirements
of this code.
Inspection shall consist
of visual examination, during or after manufacture, fabrication,
assembly or pressure tests.
In the event
repairs or additions are made after the pressure test, the
affected piping shall be tested.
Minor repairs and additions are not required to be pressure tested provided that the work is inspected and connections are tested with a noncorrosive leak-detecting fluid or other approved leak-detecting methods.
Minor repairs and additions are not required to be pressure tested provided that the work is inspected and connections are tested with a noncorrosive leak-detecting fluid or other approved leak-detecting methods.
Where new branches
are installed to new appliances, only the newly installed
branches shall be required to be pressure tested. Connections
between the new piping and the existing piping shall
be tested with a noncorrosive leak-detecting fluid or other
approved leak-detecting methods.
A piping system
shall be permitted to be tested as a complete unit or in sections. Under no circumstances shall a valve in a line be
used as a bulkhead between gas in one section of the piping
system and test medium in an adjacent section, except
where a double block and bleed valve system is installed.
A valve shall not be subjected to the test pressure unless it
can be determined that the valve, including the valve closing
mechanism, is designed to safely withstand the test
pressure.
Regulator and valve assemblies fabricated independently
of the piping system in which they are to be installed shall
be permitted to be tested with inert gas or air at the time of
fabrication.
Prior to testing, the
interior of the pipe shall be cleared of all foreign material.