Standard Conditions For Gas Volumes
A normal cubic meter (Nm³ ) is the metric expression of gas volume at standard conditions and it is usually (but not always) defined as being measured at 0 °C and 1 atmosphere of pressure.
A standard cubic foot (scf) is the USA expression of gas volume at standard conditions and it is often (but not always) defined as being measured at 60 °F and 1 atmosphere of pressure. There are other definitions of standard gas conditions used in the USA besides 60 °F and 1 atmosphere.
That being understood:
1 Nm³ of any gas (measured at 0 °C and 1 atmosphere of absolute pressure) equals 37.326 scf of that gas (measured at 60 °F and 1 atmosphere of absolute pressure).
1 kmol of any ideal gas equals 22.414 Nm³ of that gas at 0°C and 1 atmosphere of absolute pressure ... and 1 lbmol of any ideal gas equals 379.482 scf of that gas at 60 °F and 1 atmosphere of absolute pressure.
Notes:
- kmol = kilomole or kilogram mole
- lbmol = pound mole
Read more about this topic: Useful Conversions And Formulas For Air Dispersion Modeling
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