Water Hammer Calculator

Calculate pressure surge from sudden valve closure (water hammer) and wave propagation speed in pipes.

Initial flow velocity before valve closure.
m/s
Water: 998 kg/m³.
kg/m³
Water: 2.2 GPa. Oil: 1.5 GPa.
GPa
Internal diameter of the pipe.
mm
Pipe wall thickness.
mm
Steel: 207 GPa, PVC: 3 GPa.
GPa
Length of pipe from valve to reservoir.
m

Results

Wave Speed-m/s
Pressure Surge-MPa
Head Rise-m
Critical Closure Time-seconds
References: Wylie & Streeter — Fluid Transients; ASME B31.1