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Gas Pipeline Pressure Drop Calculator
Calculate pressure drop in gas pipelines using the Weymouth equation. Quick screening tool for gathering line and transmission pipeline sizing.
Inputs
Results
Outlet Pressure
--
psia
Pressure Drop
--
psi
Gas Velocity
--
ft/s
Reynolds Number
--
Equations
Weymouth equation: Q = 433.5 × Tb/Pb × (P1²-P2²)^0.5 / (SG×T×L×Z)^0.5 × D^(8/3)
Solved for P2: P2 = √(P1² - Q²×SG×T×L×Z / (433.5²×D^(16/3)×(Tb/Pb)²))
Note: Assumes Z=0.9, Tb=520°R, Pb=14.7 psia. Valid for turbulent flow in rough pipes.
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