cfm and scfm

Questions and answers on how to convert things from one unit or system to another


cfm and scfm

Postby ronjg » Sun Aug 28, 2005 7:14 am

How do you convert from cubic feet per minute to standard cubic feet per minute.

Postby Guest » Sun Aug 28, 2005 6:06 pm

Ideal gas law.

CFM is measured at actual temperature and pressure. SCFM is volume adjusted by ideal gas law to a reference temperature and pressure. The reference pressure is almost certainly 1 atm, 101.325 kPa. The temperature varies by gas and by industry, 15 C, 20 C, 60 F, and 70 F are all used. (In ideal gas law, be sure to convert the temperature to absolute, either kelvin or Rankine depending on which units you are using.

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