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  • Propane cubic feet

    My propane tank is filled with 40 lbs of liquid propane. How many cubic feet of gas is this?

    Thanks

  • #2
    Re: Propane cubic feet

    Originally posted by Unregistered View Post
    My propane tank is filled with 40 lbs of liquid propane. How many cubic feet of gas is this?

    Thanks
    Liquid propane has a specific gravity of 0.504 at 60 F, which equals approximately 4.20 lb/gal at the same temperature. 1 gallon (US) is equal to 0.13368 ft3

    40 lbs / 4.20 lb/gal = 9.52 gallons
    9.52 gallons * 0.13368 gallons/ft3 = 1.27 ft3

    The ratio of expansion for propane from a liquid to gas is approximately 277:1, so 1.27 ft3 liquid converts to 351.8 ft3 of gas
    Last edited by Dirtman; 03-30-2010, 09:52 AM.

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