Specific Gravity of Gas
Specific gravity of gas, abbreviated as \(SG_g\), a dimensionless number, is the ratio of the density of the gas to the density of air at a standard pressure and temperature.
Specific Gravity of Gas formula |
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\(\large{ SG_g = \frac{\rho_g}{\rho_a} }\) | ||
Symbol | English | Metric |
\(\large{ SG_g }\) = specific gravity of gas (air = 1.0) | \(\large{dimensionless}\) | |
\(\large{ \rho_a }\) = density of air | \(\large{\frac{lbm}{ft^3}}\) | \(\large{\frac{kg}{m^3}}\) |
\(\large{ \rho_g }\) = density of gas | \(\large{\frac{lbm}{ft^3}}\) | \(\large{\frac{kg}{m^3}}\) |