Calculators

Pipe Line Sizing

Velocity, Reynolds number, friction, fittings, and total pressure drop for liquid or gas service. Applies API RP 14E erosional velocity limit and typical ΔP/100 ft ranges as design checks.

Method: Darcy–Weisbach with Swamee–Jain (64/Re below Re=2100 for laminar). API RP 14E erosional velocity: v_e = C/√ρ with C=100 (continuous service); some operators use C=125 for non-corrosive service. Typical economic ΔP/100 ft: liquids 1–5 psi/100 ft; gas 0.1–0.5 psi/100 ft.

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Pipe Line Sizing

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