Someone needs to explain to me why I need a flow test on anything that merely flows 30 or so gpm unless my pressure demand is near my city static.
On Wed, Apr 11, 2012 at 9:57 AM, IPA <[email protected]> wrote: > By default you need to calc according to 13 (which requires a full flow > test). The only exception is if you use the simplified calculation method > described by 13D which is essentially calculating to only a static pressure > and also requires you to figure in losses through tees on the run and is > only good for straight run systems (ie. tree), and mains larger than 4" (if > I recall correctly). > > > > On Wed, Apr 11, 2012 at 9:29 AM, Gary Stites <[email protected]> wrote: > > > If I remember right, if a 13D system is looped or gridded then, > > technically, it is to be calculated against a curve rather than static > > pressure, thus requiring a flow test. > > > > On Wed, Apr 11, 2012 at 9:20 AM, Owen Evans <[email protected]> wrote: > > > > > I am curious to know how many of you have had an AHJ require a full > blown > > > flow test be submitted with 13D calculations? 13D only requires a > static > > > pressure reading from the job site address. Reason being, it is > > understood > > > that a 13D system demand (two heads flowing, 26gpm) will not over-run a > > > municipal water system. The flow test is only required for buildings > that > > > fall under the NFPA 13 standard. The cost of a flow test can be very > > > expensive and time consuming. Contractors must wait for the water > > purveyor > > > to conduct the test. > > > > > > > > > If an AHJ requires a flow test for a 13D system, and since 13D does not > > > require a flow test, doesn't the AHJ have to get approval from the > State > > > Fire Marshal and/or Building Standards Commission to require this > > expensive > > > (and unnecessary) test? > > > > > > > > > It seems to me that the only reason a plan checker would require a flow > > > test for a 13D system is because they don't understand or recognize the > > > reason behind a flow test. > > > > > > > > > Any suggestions on how to educate a plan checker without making them > look > > > bad would be appreciated. > > > > > > > > > Regards, > > > Owen Evans > > > -------------- next part -------------- > > > An HTML attachment was scrubbed... > > > URL: < > > > > > > http://fireball.firesprinkler.org/mailman/private/sprinklerforum/attachments/20120411/9d3529a9/attachment.html > > > > > > > _______________________________________________ > > > Sprinklerforum mailing list > > > [email protected] > > > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > > > > > > > > > > > -- > > Gary Stites > > 661-213-9379 > > > > RLH <http://www.rlhfp.com> > > gstites.tumblr.com > > Mr. Ricky <http://www.facebook.com/pages/Mr-Ricky/119445524768916> > > Moondogs Golf Country Club <http://www.moondogscc.com> > > NBC Worship Team <https://sites.google.com/site/nbcjudah/> > > facebook.com/gsprink <http://www.facebook.com/gsprink> > > Pandora Station <http://www.pandora.com/?sc=sh43464983213902734> > > Hit Record <http://www.youtube.com/watch?v=beQh8jtIarM> > > -------------- next part -------------- > > An HTML attachment was scrubbed... > > URL: < > > > http://fireball.firesprinkler.org/mailman/private/sprinklerforum/attachments/20120411/aad97cd2/attachment.html > > > > > _______________________________________________ > > Sprinklerforum mailing list > > [email protected] > > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: < > http://fireball.firesprinkler.org/mailman/private/sprinklerforum/attachments/20120411/53c3aa16/attachment.html > > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > -- Ron Greenman Instructor Fire Protection Engineering Technology Bates Technical College 1101 So. Yakima Ave. Tacoma, WA 98405 [email protected] http://www.bates.ctc.edu/fireprotection/ 253.680.7346 253.576.9700 (cell) Member: ASEE, SFPE, ASCET, NFPA, AFSA, NFSA, AFAA, NIBS, WSAFM, WFC, WFSC They are happy men whose natures sort with their vocations. -Francis Bacon, essayist, philosopher, and statesman (1561-1626) -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://fireball.firesprinkler.org/mailman/private/sprinklerforum/attachments/20120411/e603c7e4/attachment.html> _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum
