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Is there a way to calculate gas flow rate from output PSI?

  1. Nov 30, 2014 #1
    I've noticed that certain propane torches will have a seemingly linear relationship between their PSI and BTU/hr. IE, 18 PSI -> 220,000 BTU/hr. From this a person could calculate how much gas is being burned per sec/minute/hr.

    So, is there a general relationship/formula that I can use to calculate gas flow rate based off the PSI? Like if I have a propane tank releasing propane at a pressure of 25 PSI, how could I calculate how much weight in propane is being burned per second (without knowing the ratios in the first paragraph)?
  2. jcsd
  3. Nov 30, 2014 #2


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    No. You're missing quite a number of parameters.
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