Specific gravity is the ratio of the density of gas to the density of air. First the density of the gas is determined. Density is the mass of a unit volume of the substance in constant temperature...
specific gravity for common natural gas : 0.55 to 0.7 Specific gravity is unitless and is give the density of the gas divided by the density of air at 20C and 1bar.
Specific gravity and density will have the same value when the two substances under investigation have identical densities. Let's look at this.
Density is an expression of the amount of mass per...