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Table 7.1 <br /> Distances to Various Types of Propane Hazards Under Different Release Models" <br /> Vapor Explosion Fire Ball <br /> Model Details of the Propane Release Dispersion Hazard Radiation <br /> # Model Releases from or due to Distance Distance Distance <br /> to LFL <br /> (ft.) (ft.) (ft.) <br /> la 1"ID x 150 ft. 250 110 50 <br /> Bobtail hose failure. hose length <br /> lb Release of the entire 1"ID x 120 ft. 230 103 45 <br /> inventory in the hose, hose length <br /> lc quickly. 1" ID x 75 ft. hose 190 90 40 <br /> length <br /> Release of the inventory in a transfer piping 1" x 30 ft. <br /> 2a + @ 20 gpm for 10 minutes, due to failed excess 135 120 25 <br /> flow valve. <br /> 2b Release of the inventory in a transfer piping 2"x 30 ft. 230 252 48 <br /> +@ 80 g m for 10 minutes. <br /> 2c Release of the inventory in a transfer piping 2"x 80 328 235 74 <br /> ft.+@ 70 gpm for 10 minutes. <br /> Release of the inventory in a transfer piping 2.5"x <br /> 2d 30 ft.+@ 80 gpm for 10 minutes. 269 252 59 <br /> 2e Release of the inventory in a transfer piping 3"x 30 ft. 312 287 69 <br /> +@ 100 gpm for 10 mins. <br /> 2f Release of the inventory in a transfer piping 3"x 18 ft. 256 284 55 <br /> +@ 100 gpm for 10 minutes. <br /> 3 Release from the container pressure relief valve. No ignitable vapor concentration <br /> at ground level. <br /> Release from a 1"ID x 150 ft.transfer piping to a <br /> 4 vaporizer and reduced flow from a partially open 250 120 50 <br /> excess flow valve @ 20 gpm for 10 minutes. <br /> Leak from a corrosion hole in a transfer pipe at a <br /> 5 back pressure of 130 psig (corresponding to 800F) 110 120 5 <br /> for 60 minutes.Hole size is '/4"ID. <br /> 6a Release of the entire inventory in a 2" ID x 20 195 90 40 <br /> ft.transfer hose. <br /> 6b Release of the entire inventory in a 2.5"ID x 16 ft. 215 98 45 <br /> transfer hose. <br /> Transport hose blow down:Hose size 2" ID,20 ft. <br /> 7a length release for 3 minutes,from a transport after 25 30 <5 <br /> the tank is filled. <br /> Transport hose blow down:Hose size 2.5"ID, 16 ft. <br /> 7b length release for 3 minutes,from a transport after 25 29 <5 <br /> the tank is filled. <br /> Transport hose blow down:Hose size 3" ID, 16 ft. <br /> 7c length release for 3 minutes,from a transport after 31 36 <5 <br /> the tank is filled. <br /> **Results from models described in Appendix B.The results are rounded to the nearest 5 feet. <br /> A - 17 <br />