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Water Hammer Pressure Worksheet
Water hammer pressure depends on velocity change, liquid density, pipe wave speed and how quickly the event closes relative to the line length.
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Calculator path
- 1 Water hammer calculator Primary page for the main search intent.
- 2 Check pipe pressure rating Supporting formula or reference page.
- 3 Pipe pressure drop calculator Darcy-Weisbach loss, head and velocity from flow and pipe ID.
- 4 Pipe size by flow velocity pick a first-pass pipe ID from flow and target velocity.
- 5 Pump flow and HP calculator pump displacement, pressure, flow, kW and horsepower.
Velocity from flow
v = Q / A
Joukowsky surge
dP = rho * a * dV
Critical closure time
tcrit = 2 * L / a
Related pages
- Pipe pressure drop calculator - Darcy-Weisbach loss, head and velocity from flow and pipe ID.
- Pipe size by flow velocity - pick a first-pass pipe ID from flow and target velocity.
- Pump flow and HP calculator - pump displacement, pressure, flow, kW and horsepower.
- Pump NPSH calculator - available suction head and NPSH margin.