Hydraulic Hose Size Worksheet
Hydraulic hose size starts with flow and target velocity, then the selected actual hose ID needs a pressure-drop and heat-loss screen.
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Pressure-drop equation
dp = (f * L / D + sumK) * rho * v^2 / 2
Worksheet rows
- Enter flow and actual hose ID.
- Enter oil viscosity at operating temperature.
- Add hose length and fitting K allowance.
- Compare velocity, Reynolds number and pressure drop.
Sizing caution
Suction, pressure, return and case-drain lines use different practical velocity ranges. Manufacturer hose ratings still govern.
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.