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fricfact2


Friction Factor Calculator

Friction Factor Calculator

Provided for your use by HRSGdesign.com

The head losses in a pipe are proportional to the friction factor. The Moody diagram is the commonly employed method of determining the friction factor given the Reynolds number and relative roughness of the pipe. The Moody diagram, apart from the straight line for laminar flow, is a log-log plot of the Colebrook formula relating the friction factor, Reynolds number, and relative roughness.

The relative roughness of a pipe or tube is equal to absolute roughness divided by the inside diameter of the pipe. For a clean pipe or tube, this value for an inside diameter given in inches is normally 0.0018 inch. This is the value used in this calculator.


Reynolds number =
Inside Diameter, inches =

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