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Pipe Sizing

Size pipework for a target flow velocity, giving required internal diameter and nearest nominal size with a velocity check.

Flow rate

Enables low-velocity & erosion warnings

Velocity & pressure-drop limits

Pa/m

CIBSE typical 200–300 Pa/m

°C

For viscosity in friction calc

%

Adds headroom to required Ø

Enter a flow rate to size pipe
ensign.software · 28 October 2026The Ensign Toolbox