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TOXIC GASES 55-1
<br /> Table 2-2.1.1 Location Preference of Flamma5le Gas Storage Areas
<br /> ` Total Volume of Flammable Gas (scf)
<br /> Up to 2501 scf(70.8 ms)to In Excess of
<br /> Location 2500 scf(70.8 ms) 5000 scf(141.6 ms) 5000 scf(141.6 ms)
<br /> Outdoors I I 1
<br /> In a Separate Building II II II
<br /> In a Separate Room III III III
<br /> Inside Buildings Not in a Separate Room
<br /> and Exposed to Other Occupancies IV Not Permitted Not Permitted „1•
<br /> Exception: Electrical equipment in ventilated storage rooms larger occupancies in accordance with NEPA 13, StandQrd for the Instalhf-
<br /> than 10,000 fts (283 ms), containing 2500 scf(70.79),W) or less tion of Sprinkler Systems.
<br /> ( of flammable gases, and with no cylinder sampling activity shall be 2-2,2.3 Gas cylinder storage'rooms`shall be 'rovided with
<br /> permitted to be unclassified. natural or mechanical ventilation designed to provide a mini-
<br /> 2-2.1.4 Smoking and open flames shall not be permitted in mum of 1 cfm/ft2 (0.3 ms/min�m2)'of floor area,Ventilation
<br /> storage areas or Within 20 ft (6.1 m) of storage areas. systems shall discharge a minimum of 50 ft(1'5 m)from intakes
<br /> 2-2.1.5 Gas cylinders shall be stored'a minimum distance of
<br /> of air-handling systems, air-conditioning'e'quipinent,'and air
<br /> 20 ft (6.1 m) from storage of flammable and combustible compressors. ;
<br /> liquids and solids. 2-2.3 The following requirements shall apply to the indoor
<br /> storage of greater than 5000 scf(141.6 ms)of flammable gas'e's
<br /> 2-2.1.6- Liquefied flammable gas cylinders shall be stored in in any fire area.
<br /> the upright position or such that. the pressure relief valve is
<br /> in direct communication with the vapor space of the cylinder. 1 2-2.3.1 Gas cylinders shall be stored in a 'room or enclosure
<br /> with a minimum fire resistance rating of 2 hours.At least one
<br /> 2-2.1.7 Storage of multiple g3 ups of cylinders of flammable wall of the room shall be an exterior building`wall: j'j
<br /> gases, each 2500 scf(70.79 m ) or less, in one fire area shall
<br /> be permitted where the groups are separated b a minimum 2-2.3.2 Gas cylinder storage rooms ghall�e rgvided,wi ,a
<br /> P g P P" Y", P , 4h
<br /> distance of 100 ft (30.5 m). sprinkler system designed in accordance with NFPA 13,'Stan-
<br /> i lard for the Installation of Sprinkler System's:The sprinkler system
<br /> Exception: The separation distance shall be permitted to be reduced shall be capable of providing a minimum density of
<br /> to Oft when separated by masonry walls with afire resistance rating 0.30 gpm/ft2 (0.012 m3/min•m2) over the most hydraulically
<br /> of 2 hours. remote 2500 ft2 (232.25 m2) or the entire room area,which-
<br /> 2-2.1.8 Different flammable gases shall be permitted to be ever is smaller. ,
<br /> stored together in a group. 2-2.3.3 Gas cylinder storage rooms shall be provided;wit}
<br /> 2-2.2. The-following requirements shall apply to the indoor mechanical ventilation designee} to provide a mipinipm oQ
<br /> storage of flammable gases between 2501 scf(70.82 ins) and C1,111/0 (0.3 ms/,min.m2) of flqor area.,Ventilation systpms
<br /> 5000 scf(141.6 ms) in any fire area. shall discharge a minimum of 50 ft (15 m) from intakes of
<br /> air-handling systems, air-conditioning equipment, and, air
<br /> 2 2.2.1 Gas cylinders shall be stored in a room or enclosure compressors.
<br /> With a minimum 1-hour fire resistance rating.
<br /> Exception: Gas cylinders shall be permitted to be stored in areas not
<br /> within a 1-hour fire resistance rating where the entire building is Chapter 3 Toxic Gases
<br /> equipped throughout with an automatic sprinkler system designed in
<br /> accordance with NFPA 13, Standard for the Installation of Sprinkler 3-1 General Requirements. In addition to the requirements
<br /> Systems. The sprinkler system protecting the gas cylinder storage, and of Chapter 2, the following specific requirements foF storage
<br /> for a distance of 25 ft (7.6 m) beyond in all directions, shall be of toxic gases shall apply.
<br /> Icapable of providing a minimum density of 0.30gpm2/ft2 (0.012 rns/ 3-1.1 Indoor storage areas used to store t Adie!gases'§hall be
<br /> mi?rm) over the most hydraulically remote 2500 ft . equipped with a continuous gas detection system that provides
<br /> 2-2.2.2 . Multiple groups of cylinders within one sprinklered an alarm to warn of the presence of toxic gases in levels that
<br /> fire area shall be permitted where the groups are separated present a hazard to life. i Al
<br /> by a minimum distance of 100 ft (.�0.5 ni). Exception:,*,,,A continuous gas detection system s40.1094 be required
<br /> toxic asps with a health rating 3 when the u ra e of
<br /> the
<br /> Exception No. 1: This distance shall be permitted tq be reduced to f9r g g of rfg. l
<br /> �= 50 ft(15 m) in buildings protected with a sprinkler,system designed odor threshold limit of the gas,is at a level below,;he-permissible
<br /> for Ordinary Hazard,Group 1 occupancies or Light Hazard occupan- exposure level of the gas.
<br /> cies in accordance with NTPA 13, Standard for the Installation of' 3-1.2 Exhaust ventilation systems shall be installed in alliin-
<br /> Sprinkler Systems. door areas used for toxic gases.,, ,r.. , 1,4
<br /> Exception No. 2: This distance shall be permitted to be reduced to Exception; ; Exhaust ventilation systems shall not be required for toxic
<br /> 25 fl(7.6 m) in buildings where the occupancy between storage areas gases with a health hazard rating of 3,when the total amat4rt(;1torpd
<br /> is frog of combustible materials and prp(ected with sprirekler'system is less than 650 scf(18.4 nr�), or,,$l0.scf(22.9•m,): 10,08
<br /> designed for Ordinary Hazard, Group l occupancies or Light Ilazard k®]far chlorine:
<br /> ,1sse�i1@(on
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