Occupancy Requirements - Laserfiche WebLink

Home Browse Search

APPENDIX A 55-11 Spector; or others having statutory authority. For insurance A-2-1.6.3 For additional information on storage of cylinder purposes,an insurance inspection department,rating bureau, gases see CGA Publication P-1,Safe Handling of Compressed Gas or other insurance company representative may be the author- in Containers. ity having jurisdiction. In many circumstances, the property owner or his or her designated agent assumes the role of the A-3.1.1 Exception. See Odor Thresholds for Chemicals rurith Es- authority having jurisdiction;at government installations,the tablished Occupational Health Standards for an odor.threshold commanding officer or departmental official may be the au- rating of gases. thority having jurisdiction. A-2-1 See Table A-2-1(a) and Table A-2-1(b). A-3-3 Health 3 Storage Requirements. For chlorine cylin- 1ders,a kit specified by The Chlorine Institute,Inc.is available A-2-1.5 See Figure A-2-1.5. for this purpose. Table A-2-1(a) Nominal Capacities of Some Gas Cylinders Cylinder Size, Cylinder Nominal Capacity at 10%Overfill Pressure (scf) (length X diameter Pressure at in inches) DOT Specification 70°F Oxygen Nitrogen Argon Air Helium Hydrogen 51K x 32 3A/3AA-2015 2217 64 58 63 59 56 54 7 x 32 3A/3AA-2015 2217 92 85 92 86 81 79 7 x 43 3A/3AA-2015 2217 125 115- 125 117 110 107 7 x 43 3AA-2065 2492 141 128 140 130 122 119 7%a x 46 3AA-2015 2217 156 143 155 145 136 133 9 X 51 3A/3AA-2015 2217 251 230 250 233 219 215 9 x 51 3AA-2265 2492 282 255 280 260 244 239 9% X 55 3AA-2400 2640 337 304 336 310 291 284 Note: DOT permits compressed gas cylinders to be filled to 110%of rated service pressure when a"+"is stamped following the most recent test date. A-34 Leakage Mitigation. The requirement for a gas cabinet connected to a treatment system is an appropriate require- Table A-2-1(b) Nominal Capacities of Acetylene Cylinders ment at users' locations for handling leaking toxic gas cylin- ders containing gases with a health hazard rating of 4. User Cylinder Size Nominal Acetylene locations incorporate cylinders both in storage and in use, (length x diameter in inches) Capacity (scf) where the potential for leaks is greater than at gas manufactur- 4 x 12 10 ers' and distributors' storage locations for these gases. 6 x 19 40 At gas manufacturers'locations,the handling of these gases 7 x 25 78 is the main business,and the employees are thoroughly trained 8 x 30 130 in the properties and emergency handling of these products. 40 X 30 190 In fact,the majority of these locations actually house gas'sudppli- 101% x 32%, 275 ers' emergency response teams that respond to emergencies 12 x 37 300 at users' locations. 12 x 39 360 At these locations, based on the lower risk,of`leaks,and Note: Acetylene is not compressed in cylinders but is dissolved in a the more highly trained emergency response personnel, it is solvent inside the cylinder. Pressure is not a variable. appropriate to allow a containment device and other equip- ment to be used in lieu of a gas cabinet and treatment system to handle leaking toxic gas cylinders.With the on-site personnel Toxic capable of minimizing and controlling the initial stages of a leak from a cylinder in storage,the proximity of a containment (620.1m 60 fm) device within up to 2 hours from a storage location is consid- 20 ft' ered to be readily available because most leakage rates are (6.1 m) low and continue f'or many hours. 2.1 ft' (6.1 m) A-4-2 For information on labeling of compressed and lique- (60 fin) 20 ft' ' ' tied gas cylinders see CGA C-7,Guide to the Preparation of Precau- (6.1 20 m) tionary Labeling and Marking of Compressed Gas Containers. Oxidizing Flammable A-7-1.2 For information on reducing the hazards of'static Nonflammable—No separation required 20 ft' electricity see NFPA 77,Recommended Practice on Static Electricity, (6.1 m) A-7-3 See NFPA 70,Articles 700 and 701.' Pyrophoric A-7-4.4 If toxic gas leakage is emitted to the atmosphere, regulations of EPA and state and local environmental law can 'The 20-ft(6.1-m)distance may be reduced without limit when separated also apply. by a barrier of noncombustible materials at least 5 ft(1.5 m)high that has a fire resistant rating of at least Y2 hour. A-7-5.1 A safe area is one that is not likely to be immediately C affected by the release of toxic compressed gases in the area Figure A-2-1.5 Separation of gas cylinders by hazard. of concern. 1998 Edition