Equivalent Piping Length Head Loss Equation Fluids


Fluid Flow Table of Contents
Hydraulic and Pneumatic Knowledge

 Fluid Power Equipment

Equivalent Piping Length Head Loss Equation Fluids

Minor losses may be expressed in terms of the equivalent length (Leq) of pipe that would have the same head loss for the same discharge flow rate. This relationship can be found by setting the two forms of Darcys equation equal to each other.

Head Loss

This yields two relationships that are useful.

Head Loss

Typical values of Leq/D for common piping system components are listed in Table 1. The equivalent length of piping that will cause the same head loss as a particular component can be determined by multiplying the value of Leq/D for that component by the diameter of the pipe. The higher the value of Leq/D, the longer the equivalent length of pipe.

Head Loss

Example:

A fully-open gate valve is in a pipe with a diameter of 10 inches. What equivalent length of pipe would cause the same head loss as the gate valve?

Solution:

From Table 1, we find that the value of Leq/D for a fully-open gate valve is 10.

Head Loss

By adding the equivalent lengths of all components to the actual length of pipe in a system we can obtain the Leq value for the entire piping system.

Contribute Article Spider Optimizer

© Copyright 2000 - 2017, by Engineers Edge, LLC www.engineersedge.com
All rights reserved
Disclaimer | Feedback | Advertising | Contact

Spider Optimizer

Home
Engineering Book Store
Engineering Forum
Excel App. Downloads
Online Books & Manuals
Engineering News
Engineering Videos
Engineering Calculators
Engineering Toolbox
Engineering Jobs
GD&T Training Geometric Dimensioning Tolerancing
DFM DFA Training
Training Online Engineering
Advertising Center


Copyright Notice

Publishing Program