Exactly what it says. It might help for you to look at where it is used in the standard. It’s covers three items: the required pressure rating of components, the required hydrostatic test, and the sizing of the expansion chamber. All of these items are about maximum pressure. So when the definition says the maximum pressure whether when flowing or non-flowing where’s the beef?
Roland Huggins, PE - VP Engineering American Fire Sprinkler Assn. --- Fire Sprinklers Saves Lives Dallas, TX http://www.firesprinkler.org <http://www.firesprinkler.org/> > On Mar 11, 2015, at 11:42 AM, Vince Sabolik <[email protected]> wrote: > > On 3/11/2015 12:03 PM, Roland Huggins wrote: >> The needed answer depends on what is the underlying or driving question in >> why you ask > > All right, define "working pressure". > > Would that be the pressure available at no flow; pressure at design flow; > or the pressure present at one head flowing? > > In the NFPA definitions, it says "the maximum anticipated static (nonflowing) > or flowing pressure" > > Either or? > > Who (or what) is supposed to determine? > > > > > West Tech Fire Protection, Inc. > 11351 Pearl Road / Strongsville, Ohio 44136 > Phone 440 238-4800 Fax 440 238-4876 Cell 440 724-7601 > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
