Information About LP-Gas

Information About LP-Gas

Information About LP-Gas Propane Butane
Formula C3H8 C4H10
Boiling Point, ºF -44 15
Specific Gravity of Gas (Air=1.00) 1.50 2.01
Specific Gravity of Liquid (Water=1.00) 0.504 0.582
Lbs. per Gallon of Liquid at 60º F 4.20 4.81
BTU per Gallon of Liquid at 60º F 91502 102032
BTU per Lb. of Gas or Liquid 21548 21221
BTU per Cu. Ft. of Gas at 60º F 2488 3280
Cu. Ft. Vapor (at 60°F and 14.7 PSIA)/Gal. Liq 36.38 31.26
Cu. Ft. Vapor (at 60°F and 14.7 PSIA)/Lb. Liq 8.66 6.51
Cu.Ft.Vapor(at60°Fand14.7PSIA)/Cu.Ft.ofLiq 272 234
Latent Heat of Vaporization

at Boiling Point BTU/Gal.

773 808
Combustion Data:

Cu. Ft. Air Required to Burn 1 Cu. Ft. Gas

23.86 31.02
Flash Point, ºF -156 N.A
Ignition Temperature in Air, ºF 920-1120 900-1000
Temperature in Air, ºF

Limits of Flammability

3595 3615
Percentage of Gas in Air Mixture; At Lower Limit – % 2.15 1.55
Percentage of Gas in Air Mixture; At At Upper Limit – % 9.6 8.6

These figures are from the RegO Serviceman Manual. Find the RegO Serviceman Manual here.