I got a flow test with a much higher pitot than residual due to a 51 Ft. elevation change.
Art ATCO -----Original Message----- From: Sprinklerforum [mailto:sprinklerforum-boun...@lists.firesprinkler.org] On Behalf Of mphe...@aerofire.com Sent: Wednesday, May 13, 2015 1:41 PM To: sprinklerforum@lists.firesprinkler.org Subject: RE: Flow test - Playpipe w/ 1 1/4" Tips Also, I think you missed what Art said, he was referring to the Pitot pressure in excess of the residual, and actually, I believe that can happen when testing with a Playpipe due to the increase in velocity. Or I could have just made that up........ steve. :-0 Mark at Aero 602 820-7894 -----Original Message----- From: Sprinklerforum [mailto:sprinklerforum-boun...@lists.firesprinkler.org] On Behalf Of Roland Huggins Sent: Wednesday, May 13, 2015 10:22 AM To: sprinklerforum@lists.firesprinkler.org Subject: Re: Flow test - Playpipe w/ 1 1/4" Tips Technically it can happen. When the supply drops, additional supply pumps kick on, creating a residual pressure greater than the static. No guidance in NFPA 24 in how to address so if one applies a literal read, you extrapolate toward infinity. It's in the works to address. 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 May 13, 2015, at 9:46 AM, Art Tiroly <atir...@atcofirepro.com> wrote: > > How did you get a pitot higher than the residual? Can't happen. Gage error? > _______________________________________________ Sprinklerforum mailing list Sprinklerforum@lists.firesprinkler.org http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list Sprinklerforum@lists.firesprinkler.org http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com _______________________________________________ Sprinklerforum mailing list Sprinklerforum@lists.firesprinkler.org http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
