Engineering Design Data - PVC Pipe Supplies

2012 Georg Fischer Harvel LLC 300 Kuebler Road, Easton, PA 18040 610-252-7355 Fax: 610-253-4436 & CPVC Corrosion Resistant Industrial Pressure PipeEngineering & Design DataEngineering & Design DataHydraulic ShockHydraulic shock is the term used to describe the momentary pressure rise in a piping system which results when the liquid isstarted or stopped quickly. This pressure rise is caused by themomentum of the fluid; therefore, the pressure rise increases withthe velocity of the liquid, the length of the system from the fluidsource, or with an increase in the speed with which it is started orstopped. Examples of situations where hydraulic shock can occurare valves, which are opened or closed quickly, or pumps, whichstart with an empty discharge line.

C = a constant for internal pipe roughness. 150 is the commonly accepted value for PVC and CPVC pipe. G = flow rate of gallons per minute (U.S. gallons). di = inside diameter of pipe in inches. Compared to other materials on construction for pipe, thermoplastic pipe smoothness remains relatively constant throughout its service life. Water ...

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