Fitting Headloss
Fitting Headloss
(OP)
I usually use the headloss coefficient to calculate the headloss through water pipeline fittings. But is there an equation that can be used with the Hazen William coefficient to calculate the fitting losses.





RE: Fitting Headloss
1) http://www.cheresources.com/eqlength.shtml
2) http://www.eng-tips.com/viewthread.cfm?qid=173164
If you could have access to the publications referenced, you then have a more complete vision of the whole matter
Crane Co., "Flow of Fluids through Valves, Fittings and Pipe", Crane Technical Paper No. 410, New York, 1991.
Hooper, W. B., The Two-K Method Predicts Head Losses in Pipe Fittings, Chem. Eng., p. 97-100, August 24, 1981.
Darby, R., Correlate Pressure Drops through Fittings, Chem. Eng., p. 101-104, July, 1999.
RE: Fitting Headloss
RE: Fitting Headloss
I certainly agree.
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RE: Fitting Headloss
It would be better/easier to use a method where the resistance of the fitting is given in terms of an equivalent length of straight pipe. Once H-W has given you the pressure drop per unit length, then simply multiplying by the total equivalent length of pipe plus fittings would give the total pressure drop.
However, I would recommend rather using the Darcy Weisbach equation with Hooper/Darby k values. But sometimes contracts mandate the use of H-W and you have no choice. Even then, I would check my answers with D-W.
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