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§4830-01 Storage of Compressed Gases in Pre-Existing Facilities

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   (a)   Scope. This section consolidates the Fire Prevention Code and former Fire Department rules in effect on June 30, 2008, that are applicable to the design and installation of compressed gas installations in pre-existing facilities.
   (b)   Definitions. [Reserved.]
   (c)   General Provisions. Pre-existing facilities with compressed gas installations the design and installation of which would not be allowed or approved under the Fire Code, but that, pursuant to FC 102.3 and R102-01, may be continued with respect to such compressed gas installations under the applicable laws, rules and regulations in effect prior to the Fire Code, shall continue to comply with the provisions of such laws, rules and regulations, including former Fire Department rules §§ 12-03, 23-10, 23-06 and 23-07, as applicable, until such time as such facilities may be required to comply with the Fire Code and the rules with respect to such compressed gas installations.
   (d)   Medical Gases.
      (1)   Former Fire Department Rule § 12-03
         § 12-03 Storage of Oxygen Cylinders for Use in Institutional Occupancies.
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         (c)   Storage of oxygen cylinders.
            (1)   When outdoor storage or a separate storage building is not feasible, oxygen cylinders shall be stored in an approved storage room.
               (i)   The storage room shall conform to the Building Code, but shall have a fire resistive rating of at least one (1) hour.
               (ii)   Storage room shall be provided with natural outside ventilation consisting of an open louvre having an area equivalent to at least one percent of the storage room area, or, in lieu thereof an adequate mechanical exhaust system shall be provided. Control for mechanical exhaust system to be located outside of the storage room. Ventilation shall conform to the Building Cede, but shall not be less than the foregoing requirements.
               (iii)   Storage room to have fireproof door without louvres.
               (iv)   A sign shall be provided on the outside of the door to the storage room reading:
                  OXYGEN STORAGE
                  NO SMOKING-NO OPEN FLAMES
                  [lettering] Lettering shall not be less than two (2) inches in height and shall be either RED ON A WHITE or WHITE ON A RED background.
               (v)   All electric lights, switches, relays and other electrical equipment shall be vapor proof design if such equipment is located in the storage room.
               (vi)   Oxygen Storage Rooms shall not communicate directly with anesthetizing locations or storage locations for combustible or flammable anesthetic agents.
            (2)   Liquid oxygen cylinders may be stored only on special permit of the Fire Commissioner under such conditions as he or she deems necessary.
            (3)   When outdoor storage is utilized for oxygen cylinders: Cylinders shall be protected against extremes of weather, and from the ground beneath to prevent rusting.
               (i)   During winter, cylinders shall be protected against accumulation of ice and snow.
               (ii)   During summer, cylinders shall be screened against the continuous direct rays of the sun.
         (d)   General storage rules.
            (1)   Oxygen cylinders shall not be stored with flammable gases, oils, grease, etc.
            (2)   Cylinders to be properly secured to prevent damage and away from sources of heat.
            (3)   An oxygen cylinder for immediate and emergency use may be kept on each floor in a cabinet, closet or room. (This is in addition to cylinders in actual use.)
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            (6)  No recharging of cylinders to be conducted on premises.
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      (2)   Former Fire Department Rule § 23-10
         § 23-10 Design, Construction and Erection of Central Oxygen and Nitrous Oxide Piping Systems in Hospitals.
         (a)   Scope. This section applies only to installations made prior to the Department of Buildings taking jurisdiction on December 6, 1968 over these type installations as specified in Section P114.12 of Reference Standard 16.
         (b)   General.
            (1)   Piping systems herein described must not be used for the distribution of combustible anesthetic gases.
            (2)   Where oxygen or nitrous oxide piping is exposed, it shall be painted green for oxygen service and blue for nitrous oxide service.
            (3)   All current rules published by the National Fire Protection Association under chapter "Recommended Safe Practices for Hospital Operating Rooms", and rules adopted by the Compressed Gas Association, Inc., shall be observed insofar as applicable for the construction and use of central piping systems. In addition to these rules, the following guide specifications shall be observed:
         (c)   Manifold room.
            (1)   All electrical lights, switches, relays, and other electrical equipment shall be of vapor proof design if such equipment is located in the manifold room.
            (2)   Manifold room shall have fireproof door without louvres. Provide lettering on outside of door leading to manifold room. Letters are to be not less than 2 inches high, reading "Oxygen Room-No Smoking".
            (3)   Provide exhaust system for ventilating manifold room. If natural outside ventilation is not provided, provide adequate mechanical exhaust system. Control for mechanical exhaust system shall be outside of manifold room.
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         (d)   Manifold header.
            (1)   Manifold shall be of substantial design. Manifold and header controls shall be securely bolted to wall or floor by means of substantial supports.
            (2)   Manifold header shall be constructed of bronze or brass. High pressure headers, fitting and connecting coils shall be capable of withstanding a test pressure of not less than 4,000 pounds per square inch.
            (3)   Leads of connections attaching cylinders to manifold shall be of annealed brass, bronze or copper and of suitable strength and flexibility. Check valve to be provided in each lead to prevent backflow.
            (4)   Approved type pressure reducing valves shall be installed in manifold assembly to maintain a delivery pressure of not more than 50 pounds per square inch in the distribution system. Pressure gauges marked "Oxygen" or "Nitrous Oxide" respectively shall be provided in conspicuous location in order to permit observation of delivery pressure.
            (5)   A built-in pressure relief valve shall be provided on the reduced side of the manifold header. Relief valve shall be set at not over 100 pounds per square inch. Discharge of relief valve shall be piped to outside air.
            (6)   Means shall be provided to prevent the connection of nitrous oxide cylinders to an oxygen manifold and vice versa.
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         (e)   Distribution system.
            (1)   Oxygen or nitrous oxide distribution piping shall be standard full weight iron pipe size, brass or copper pipe with substantial brass or copper fittings or copper tubing type K or B with approved fittings and shall be made clean before installation and protected against mechanical injury. Proper allowance shall be made for expansion and contraction, jarring and vibration. Brass used for piping shall have a copper content of not less than 83 percent.
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            (3)   Threads shall be in accordance with American type pipe thread standards. Threaded joints shall be screwed and soldered or screwed with litharge and glyserine. Threadless type joints shall be brazed with high temperature brazing alloy.
            (4)   Provide shut-off valve for each individual vertical riser. Shut-off valve shall be located in a conspicuous location. Shut-off valve shall be mounted in a wall box. Cover of box shall be marked, "Riser shut-off valve oxygen service do not dose except in emergency." Cover of box shall have locking means with key for opening box in separate receptacle, mounted next to the shut-off box.
            (5)   Pipe shafts for vertical risers shall be vented at the top except such shafts which are not open between floors and in which piping is carried through sleeves packed with oil free incombustible material at the floor levels.
            (6)   Horizontal distributing branches taken off main risers on each floor shall be provided with a shut-off valve or shut-off valves so that oxygen service for an entire floor or section of a floor may be shut off without affecting service on other floors. Such shut-off valve shall be provided in each branch line for every twelve outlets or for every hundred feet of branch line, passageway between furthermost outlet and shut-off valve to be unobstructed.
            (7)   Floor shut-off valves shall be located in conspicuous manner and in easy reach, properly marked, either recessed or exposed, or
            (8)   The following may be substituted as conforming with paragraphs (4) and (7) of subdivision (e) above: A valve box fitted with an emergency replaceable polystyrene window with a pull ring assembly, which can be snapped out in an emergency. This door window shall be lettered "Caution-Oxygen or Nitrous Oxide Valve. Close only in emergency-Pull ring to break window."
         (f)   Outlet valves and outlet boxes.
            (1)   For operating rooms and anesthesia rooms.
               (i)   For each operating or anesthesia room provide a separate shut-off valve so that shutting off gas supply to one operating or anesthesia room will not affect the supply to others. Valves shall be located on the outside of such rooms and be accessible at all times for use in emergency. Valves shall be mounted in recessed boxes or in such manner that they are protected against mechanical injury. Valves shall be of acceptable type and marked to prohibit tampering or inadvertent closing.
               (ii)   Where oxygen is piped in combination with other anesthetic gases, individual wall outlets shall be fitted with safety keyed outlet valves so as to prohibit the accidental connection of an oxygen line to a nitrous oxide line and vice versa. Safety keyed outlet valves shall be automatically closed when safety key on the take-off line is disconnected from the outlet valve.
               (iii)   Where oxygen only is piped to operating or anesthesia rooms, not combined with other anesthetic gases, an approved type oxygen wall outlet valve with dust cap and chain is acceptable.
            (2)   Wall outlets in patient and treatment rooms.
               (i)   An approved type oxygen and shut-off valve with dust cap and chain, or an automatic safety keyed outlet valve, or a combination of both shall be provided exposed or in a flush mounted recessed wall box so that various accessories may be connected to such outlet valves.
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         (g)   Alarm systems. A closed circuit electrical operating alarm system shall be provided that will give a visible and audible signal when the pressure in the system varies eight pounds above or below the normal line pressure of 50 pounds. All equipment shall be approved by the Board of Standards and Appeals of the City of New York. All wiring shall be installed standard weight rigid iron conduit, and conductors shall be not less than #14 gauge copper wire. Alarm indicating panel shall be located in a strategic location in the hospital where it is under observation at all times. The system shall be connected to the house side of the owner's lighting meter through an approved 3-wire National Electric Code (N.E.C.) cartridge fuse cut-out having a removable strap or neutral bar. This cut-out cabinet shall be painted red, provided with a lock and stenciled "OXYGEN ALARM".
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   (e)   Anhydrous Ammonia.
      (1)   Former Fire Department Rule § 23-06
         § 23-06 Storage and Use of Ammonia with Dissociating Equipment.
         (a)   Location. Location, of a tank, is to be approved by the Department of Buildings after a site inspection by a representative of the fire department.
         (b)   Storage.
            (1)   Storage of ammonia in cylinders shall be in an area of masonry which has been approved by the Department of Buildings. This area shall be independently vented to the outer air.
            (2)   Storage of ammonia in tanks.
               (i)   Tanks may be located above ground outside of buildings.
               (ii)   Such tanks shall be provided with: Protection against the sun's rays; electrical groundings; protection against damage by a barrier satisfactory to the fire commissioner; a water deluge system over the tank; a remote control for such deluge system; a vandal-proof fence which will surround the tank.
            (3)   Tanks located inside the buildings shall be equipped with both manual and automatic deluge systems.
         (c)   Piping and valves.
            (1)   All piping shall be extra heavy black steel properly supported and protected against mechanical injury and atmospheric corrosion and all fittings and valves forged or cast steel (not galvanized).
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            (3)   Provide dual relief valves from NH3 storage tank so that either relief valve may be removed for servicing without impairing protection of tank.
            (4)   All relief valves shall discharge in vent line piped at least 10' above roof of building and above any exposure within 25'. Such vents shall be equipped with rain caps.
         (d)   Ammonia dissociators.
            (1)   All dissociators or ovens used with dissociated ammonia, hydrogen or hydrogen-nitrogen mixtures shall be approved for such use by the Board of Standards and Appeals.
            (2)   All dissociator rooms shall be fireproof or fire resistive, sprinklered, and have independent fixed ventilation which shall conform with § 27-4131 of the Administrative Code.
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            (4)   Each oven or dissociator shall be vented to the outer air by rigid steel piping or a sheet metal duct with all joints tight.
         (e)   General requirements.
            (1)   Ammonia storage tanks shall meet the specifications of the American Society of Mechanical Engineers, or be approved by the Board of Standards and Appeals for such purposes.
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            (3)   Ammonia storage tanks shall not exceed 1,000 gallons in capacity.
            (4)   Tanks shall not be filled to more than 54% waterweight of capacity (approximately 85% by volume).
            (5)   Liquid outlets from tanks shall be protected with excess flow valves.
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            (7)   Instruction cards or operating charts shall be posted at or near the storage tanks, dissociators and ovens.
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            (9)   No mercury manometers or mercury seals shall be used at any time.
            (10)   All premises wherein ammonia in bulk is stored or used shall have at least twelve (12) sulphur tapers ready for use in event of a leak.
      (2)   Former Fire Department Rule § 23-07
         § 23-07 Storage and Use of Anhydrous Ammonia for Duplicating Machines.
         (a)   Scope. This section shall be applicable whether or not a permit is required under Chapter 4 of Title 27 of the Administrative Code. In cases of a conflict of this section with the requirements of the Board of Standards and Appeals, the latter shall prevail.
         (b)   Appliance shall be approved by New York City Board of Standards and Appeals and bear a permanently affixed label indicating such approval and its calendar number. Installation shall comply with the requirements of that resolution.
         (c)   Only one cylinder of anhydrous ammonia, not exceeding 150 lbs. capacity shall be used, except that each machine may have one reserve cylinder in the use area when properly manifolded to a pressure relief valve in accordance with § 23-07(d) and the supply valve is in the open position. All cylinders shall be secured by chain or other suitable means to prevent accidental toppling. Machines using a cylinder of 8 lbs. net weight or less of anhydrous ammonia, in addition to the permitted manifolded reserve, may have an additional 8 lbs. reserve supply, without manifold, in the use area in a metal cabinet marked in accordance with § 23-07(i).
         (d)   Relief valves shall be provided for anhydrous ammonia machines and such valves shall be set at not over 250 p.s.i. Relief valves shall be piped to a safe location in outer air by not less than 1/2 inch pipe. Piping to the outer air is not required for machines using a cylinder of eight pounds net weight or less if its relief valve is piped into an absorber.
         (e)   An excess flow valve shall be installed in the lines at or near the cylinder outlet; however, an excess flow valve is not required where a fitting is used with an orifice diameter, of a #60 drill size or less, properly installed.
         (f)   Systems using anhydrous ammonia cylinders, any of which exceed 8 lbs., shall be exhausted directly to a safe location in outer air through a duct of 4" minimum diameter. Air flow is to be insured by a mechanical blower with a minimum capacity of 175 cubic feet per minute incorporated into the machine. The provision of ventilation shall comply with Chapter 1 of Title 27 of the Administrative Code.
(g)
(1) In addition to those permitted in § 23-07(c), reserve anhydrous ammonia cylinders stored shall not exceed a total of 300 lbs. net weight of anhydrous ammonia for use by any single occupant. Such storage shall be outdoors — protected from sun and all mechanical injury when such outside storage is permitted by the Zoning Resolution and is approved by the Department of Buildings or Department of [Ports and Trade] Small Business Services — or indoors in a separate room with ventilation to the outer air through a duct of 4" minimum diameter with inlet near ceiling. Plans for reserve storage rooms are to be approved by Department of Buildings or Department of [Ports and Trade] Small Business Services before construction is commenced, with a copy of approved plans to be filed with the Bureau of Fire Prevention. The door to the reserve storage room is to be self-closing and vapor tight if such doors lead to the interior of the building.
            (2)   The reserve storage room shall be equipped with open sprinkler heads which are placed in operation by a properly labelled valve located outside the storage room. The sprinkler line may be connected to house water supply in non-sprinkler buildings if lines are of adequate size according to the Administrative (Building) Code.
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         (i)   Warning signs shall be posted to be visible when entering rooms where anhydrous ammonia is used or stored. Such signs shall be visible whether doors are open or closed in accordance with the following format:
NOTICE 
THIS AREA CONTAINS ANHYDROUS AMMONIA 
IN CASE OF AN AMMONIA LEAK OR IF
A VERY STRONG AMMONIA ODOR IS PRESENT
1.   CALL THE FIRE DEPT. (PHONE # ________________)
2.   A NON-COIN PHONE MAY BE FOUND AT ________________
3.   NOTIFY ALL PERSONNEL TO EVACUATE THE AREA
4.   SHUT OFF ALL OPEN FLAMES
5.   DO NOT SHUT OFF THE DUPLICATING MACHINE SINCE THAT WOULD SHUT OFF THE BLOWER PROVIDING HELPFUL AIR EXHAUST
6.   CLOSE ALL DOORS TO ADJOINING AREA
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         (k)   All open flames shall be shut off in the event of an anhydrous ammonia leak.
         (l)   Twelve sulphur tapers, litmus paper or unexposed Diazo sensitized paper shall be provided readily accessible and located in the vicinity of the machine and reserve storage room. Such materials shall be in suitable condition to detect ammonia leaks.
         (m)   A permanent chart listing safety precautions for handling anhydrous ammonia shall be posted at storage facility and where machine is used.
         (n)   The emergency number for the fire department shall be posted in a conspicuous and permanent manner.
         (o)   All relief devices, except as provided in § 23-07(d) shall be piped directly to the outer air. Such piping shall be adequately secured and protected from physical damage. There shall be no shut-off valves in this piping.
         (p)   Detailed instructions for the operation of the anhydrous ammonia system shall be posted in a conspicuous and permanent manner.
         (q)   The anhydrous ammonia cylinder shall be connected to the duplicating machines with high pressure stainless steel flexible connector rated at 4,500 p.s.i. bursting pressure and/or with synthetic rubber hose with braid reinforcement with bursting pressure rating of 1750 p.s.i. and/or with equivalent rigid iron or steel pipe.
         (r)   All appurtenances such as flow meters, pressure regulators and pressure gauges shall be suitable for pressure involved and constructed of material suitable for use with anhydrous ammonia.

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