My consumption of propane is at 0.5 mmscfd. I have tried to do following calculation by converting gas propane to mass and then using that mass and liquid density to convert to liquid volume,. Can any experts take a review and see if this calculation looks good. or if there is any mistake

Propane Consumption = 0.5 MMSCFD= 0.5 x 10^6 / 24 = 20833 scfh

This is at 100 psig and 65°F

I convert this standard flow to actual flow using ideal gas law

Tact = 65 F = 460 + 65 = 525°R

Pact = 100 psig = 100 + 14.7 = 114.7 psia

Tstd = 60 F = 460 + 60 = 520°R

Pstd = 14.7 psia

R = 10.73 ft3 psi / lbmol °R

Pact Vact / Tact = Pstd Vstd / Tstd

Vact = Pstd Vstd / Tstd x Tact/Pact

Vact = 14.7 x 20833 / 520 x 525/114.7

Vact = 2965 ACFH

Number of moles of Propane can be found by PV = nRT

n = PV / RT

n = 114.7 x 2695 / 10.73 x 525 = 54.86 lbmol/h

Propane Mol Wt = 44.1 lb/lbmol

Propane Mass Consumption = 54.86 x 44.1 lb/h = 2419 lb/h (gas mass = liquid mass; mass conservation)

Propane Liquid Density at ambient conditions (80F ) = 30.58 lb/ft3

Propane Liquid Volume Consumption = 2419/30.58 = 79 ft3/h