Inputs Saved
Added on top of the fittings list below.
ΣK = 0.00
Results
Recommended Pipe Size
—
Based on typical max velocity for the selected fluid.
Velocity
—m/s
—
Reynolds Number
—
—
Friction Factor (Darcy)
—
Swamee–Jain
Pressure Drop
—kPa
—
Cross-section area, A—
Density, ρ—
Viscosity, μ—
Roughness, ε—
Relative roughness, ε/D—
Friction loss (f·L/D)—
Fitting loss (ΣK)—
Method. Friction factor uses the explicit Swamee–Jain correlation for turbulent flow (4000 ≤ Re ≤ 1×10⁸; valid for ε/D between 1×10⁻⁶ and 0.01). Laminar flow (Re < 2300) uses f = 64/Re. Pressure drop follows the Darcy–Weisbach equation: ΔP = (f·L/D + ΣK) · ρV² / 2. Recommended sizes pick the smallest schedule-40 commercial pipe meeting typical max-velocity guidance for the chosen fluid. Always validate against the applicable code (ASME B31, ASHRAE, ISO 4126, etc.) before specifying.