Flow Calculations

Engineering Data

(Gas/Air) Flow Equation

Differential Pressure when Flow in SCFH is known

D=Inside pipe diameter
Enter pressure in PSIG
Enter temperature in Degrees Farenheit
Gs=Specific Gravity @ standard conditions
Sch. 40 Sch. 80
Enter nominal line size in inches
SCFH=Flow in Standard Cubic Feet per Hour

Your answer in inches of W.C. D/P.

Find flow in SCFH when Differential Pressure is known

D=Inside pipe diameter
Enter pressure in PSIG
Enter temperature in Degrees Farenheit
Gs=Specific Gravity @ standard conditions
Sch. 40 Sch. 80
Enter nominal line size in inches
DP=Differential pressure in inches of water column

Your answer in Standard Cubic Feet per Hour