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Roughness factors

Roughness factors

Roughness factors

(OP)
hello,

I would like to have the CHW, roughness (epsilon in Darcy Weibach) and Manning coefficient for a HDP pipe (ex.: Sclairpipe of KHW).

Initial guess would be:
CHW = 150
epsilon = 0.005 mm
n = 0.011

Thanks,   

RE: Roughness factors

Call the fabricator (ex.: Sclairpipe of KHW).   And ask.  

Remember to ask about lifetime changes, heat/cooldown changes, and expected erosion or buildup factors for your chemical/water/air/gas/whatever.

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