Reference:  Flow of Fluids – Technical Paper No 410, 1988, Crane Co. Page 4-9, Example 4-15.


Pipe Flow Expert File: Case_36_Water_Power_Required_for_Pumping.pfe


Problem Description: 

100 US gallons per minute of water at 70°F is to be pumped through a piping system made from 3” diameter steel pipe (schedule 40).

A globe lift check valve, a gate valve and four standard threaded elbows are incorporated in to the piping system.


Find the discharge head required from a pump and the horse power required for pumping if the pump efficiency is 70%.


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Fluid Data: Water at 70°F


Result Comparison: 


Data Item

Published data

Pipe Flow Expert

Discharge Head (ft)

421

420.458

Power Required at 70% pump efficiency. (HP)

15.2

15.233


Commentary: 

The published data and the calculated results compare well.