- Gases used as refrigerants in refrigeration systems (see Section 606).
- Compressed natural gas (CNG) for use as a vehicular fuel shall comply with Chapter 23, NFPA 52 and the International Fuel Gas Code.
- Cryogenic fluids shall comply with Chapter 55.
- LP-gas shall comply with Chapter 61 and the International Fuel Gas Code.
- Piping that is designed or intended to carry more than one gas at various times shall have appropriate signs or markings posted at the manifold, along the piping and at each point of use to provide clear identification and warning.
- Piping within gas manufacturing plants, gas processing plants, refineries and similar occupancies shall be marked in an approved manner.
- Securing containers, cylinders and tanks to a fixed object with one or more restraints.
- Securing containers, cylinders and tanks on a cart or other mobile device designed for the movement of compressed gas containers, cylinders or tanks.
- Nesting of compressed gas containers, cylinders and tanks at container filling or servicing facilities or in sellers' warehouses not open to the public. Nesting shall be allowed provided that the nested containers, cylinders or tanks, if dislodged, do not obstruct the required means of egress.
- Securing of compressed gas containers, cylinders and tanks to or within a rack, framework, cabinet or similar assembly designed for such use.
- Compressed gas containers with a water volume less than 1.3 gallons (5 L) are allowed to be stored in a horizontal position.
- Cylinders, containers and tanks containing nonflammable gases, or cylinders, containers and tanks containing nonliquefied flammable gases that have been secured to a pallet for transportation purposes.
- Exhausted to the exterior through dedicated exhaust duct system installed in accordance with Chapter 5 of the International Mechanical Code.
- Supply and exhaust ducts shall be enclosed in a 1-hour fire-resistance-rated shaft enclosure from the cabinet to the exterior. The average velocity of ventilation at the face of access ports or windows shall be not less than 200 feet per minute (1.02 m/s) with not less than 150 feet per minute (0.76 m/s) at any point of the access port or window.
- Provided with an automatic sprinkler system internal to the cabinet.
- Activates an audible and visible supervisory alarm at a normally attended location upon detection of a carbon dioxide concentration of 5,000 ppm (9000 mg/m3).
- Activates an audible and visible alarm within the room or immediate area where the system is installed upon detection of a carbon dioxide concentration of 30,000 ppm (54 000 mg/m3).
- Total aggregate quantity of liquid carbon dioxide in pounds or cubic feet at normal temperature and pressure.
- Location and total volume of the room where the carbon dioxide enrichment operation will be conducted. Identify whether the room is at grade or below grade.
- Location of containers relative to equipment, building openings and means of egress.
- Manufacturer's specifications and pressure rating, including cut sheets, of all piping and tubing to be used.
- A piping and instrumentation diagram that shows piping support and remote fill connections.
- Details of container venting, including but not limited to vent line size, material and termination location.
- Alarm and detection system and equipment, if applicable.
- Seismic support for containers.
- Activates a low-level alarm upon detection of a carbon dioxide concentration of 5,000 ppm (9000 mg/m3).
- Activates a high-level alarm upon detection of a carbon dioxide concentration of 30,000 ppm (54 000 mg/m3).
- Stop the flow of carbon dioxide to the piping system.
- Activate the mechanical exhaust ventilation system.
- Activate an audible and visible supervisory alarm signal at an approved location within the building.
- Mechanical ventilation in the room or area shall be at a rate of not less than 1 cfm per square foot [0.00508 m3/(s • m2)].
- When activated by the gas detection system, the mechanical ventilation system shall remain on until manually reset.
- The exhaust system intakes shall be taken from points within 12 inches (305 mm) of the floor.
- The ventilation system shall discharge to the outdoors in an approved location.
VENTILATE THE AREA BEFORE ENTERING.
A HIGH CARBON DIOXIDE (CO2)
IN THIS AREA
CAN CAUSE ASPHYXIATION.