Fluid Mechanics · worked example

Water at 1.5 m/s in 3-inch schedule 40 pipe

Frictional pressure drop and head loss for water flowing at 1.5 m/s through 50 m of 3-inch schedule 40 steel pipe (77.93 mm bore, ε = 0.045 mm).

Inputs

Inside diameter	77.93 mm
Pipe length	50 m
Velocity	1.5 m/s
Density ρ	998 kg/m³
Viscosity μ	0.001 Pa·s
Roughness ε	0.045 mm

Result

Pressure drop	14.676 kPa
Pressure drop	2.1286 psi
Head loss	1.500 m fluid
Reynolds number	116661
Flow regime	Turbulent
Friction factor (Darcy)	0.02037

These values are computed by the Pipe Pressure Drop calculator. Open the tool to change any input.

Open the full Pipe Pressure Drop calculator →

More Pipe Pressure Drop examples

• Water at 1.5 m/s in 1-inch schedule 40 pipe
• Water at 1.5 m/s in 2-inch schedule 40 pipe
• Water at 1.5 m/s in 4-inch schedule 40 pipe
• Water at 1.5 m/s in 6-inch schedule 40 pipe
• Water at 1.5 m/s in 8-inch schedule 40 pipe
• Water at 2 m/s in 1-inch schedule 40 pipe