actually it is not a fixed velocity where results diverge. It differs based on diameter and type of material (coefficient of roughness). Sometimes HW shows a greater loss and others DW.
Roland Roland Huggins, PE - VP Engineering American Fire Sprinkler Assn. --- Fire Sprinklers Saves Lives Dallas, TX http://www.firesprinkler.org <http://www.firesprinkler.org/> > On Nov 4, 2016, at 4:21 PM, Brad Casterline <[email protected]> wrote: > > But as a bench mark, at 37 ft/sec is where Darcy-Weisbach starts exceeding > Hazen-Williams in psi/ft friction loss. > > Brad > >
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