Thanks for the clarification Cecil. -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Sprinkler Academy - C Bilbo Sent: Tuesday, October 04, 2011 6:57 PM To: FORUM Subject: RE: Equiv Orifice for OH Inspectors Test
Hello all, Be careful to read 7.2.3.1. It says "The system capacity (volume) controlled by a dry pipe valve shall be determined by 7.2.3.2, 7.2.3.3, 7.2.3.4, 7.2.3.5, or 7.2.3.7." This means you are ALLOWED to use any of these methods to determine the size of (and the delivery time for) the system. In your situation, you may be allowed (in 7.2.3.7) to build a two sprinkler manifold as shown in the annex but you must get water there in 50 seconds (NOT 60 seconds). We added this option so that folks could actually do something on the jobsite (an actual physical test) what we allow on the computer (as a theoretical exercise of proof). It should be recognized that the above is my opinion as a member of the NFPA 13 Committee on Installation Criteria, and has not been processed as a formal interpretation in accordance with the NFPA Regulations Governing Committee Projects and should therefore not be considered, nor relied upon, as the official position of the AFSA, the NFSA, the NFPA, nor any of their technical committees. Sincerely, Cecil Bilbo Academy of Fire Sprinkler Technology Champaign, IL 217.607.0325 www.sprinkleracademy.com [email protected] OUR STUDENTS SAVE LIVES!! > Date: Tue, 4 Oct 2011 17:24:03 -0700 > Subject: Re: Equiv Orifice for OH Inspectors Test > From: [email protected] > To: [email protected] > > Ed, > > Two plow points for extra hazard (four for extra) because the rules > were changed ror 10/2010 edition. > > On Tue, Oct 4, 2011 at 5:16 PM, Ed Vining <[email protected]> wrote: > > > Please help. I am confused about this thread. > > > > Why are two orifices required? > > > > Why is it being said that the flow from an 11.2k would be different > > from the flows from two 5.6k's. My old fashioned math says they > > would be the same. > > > > > > Ed Vining > > 4819 John Muir Rd > > Martinez CA 94553 > > 925-228-8792 > > Cell 787-0465 > > > > > > On Tue, Oct 4, 2011 at 2:48 PM, Cory Power <[email protected]> wrote: > > > > > The reason I'm asking is because it is an ordinary hazard system > > > and in the plans they spec the inspectors test routing to a hub > > > drain in a > > janitors > > > closet. It would be much easier to have one 11.2k orifice above > > > the hub drain than two 5.6 k's. > > > > > > > > > -- > > > Cory Power > > > P& P Sprinklers Ltd > > > 6 Main Rd > > > Chapel Arm, NL A0B 1L0 > > > Ph: (709) 592-2029 > > > Fax: (709) 592-2019 > > > > > > > > > On 10/4/2011 6:07 PM, Justin Reid wrote: > > > > > >> The Q=k*sqrt(p) math says that it should be equal flow with equal > > >> pressure. > > >> I guess you would have slightly less pressure with the 11.2 since > > >> there > > is > > >> more flow(friction). > > >> > > >> I just had an issue yesterday trying to get a flow valve to trip > > >> with a remote test (one head) and thought the same thing (to look > > >> at using two heads). > > >> > > >> Good luck, > > >> > > >> Justin Reid > > >> > > >> > > >> > > >> > > >> On Tue, Oct 4, 2011 at 1:13 PM, Cory Power<[email protected]> > > wrote: > > >> > > >> Just wondering if anyone have used an 11.2 K Orifice to > > >> substitute for > > >>> two > > >>> 5.6 k heads on an OH1 Dry Inspectors test? Shouldn't it be equivalent? > > >>> > > >>> -- > > >>> Cory Power > > >>> P& P Sprinklers Ltd > > >>> 6 Main Rd > > >>> Chapel Arm, NL A0B 1L0 > > >>> Ph: (709) 592-2029 > > >>> Fax: (709) 592-2019 > > >>> > > >>> -------------- next part -------------- An HTML attachment was > > >>> scrubbed... > > >>> URL:<http://fireball.**firespr**inkler.org/mailman/**< > > http://firesprinkler.org/mailman/**> > > >>> private/sprinklerforum/****attachments/20111004/c48f4ae4/** > > >>> **attachment.html<http://** > > fireball.firesprinkler.org/**mailman/private/ > > >>> **sprinklerforum/attachments/**20111004/c48f4ae4/attachment.**ht > > >>> ml< > > http://fireball.firesprinkler.org/mailman/private/sprinklerforum/att > > achments/20111004/c48f4ae4/attachment.html > > > > > >>> > > > >>> ______________________________****_________________ > > >>> Sprinklerforum mailing list > > >>> Sprinklerforum@firesprinkler.****org > > >>> <Sprinklerforum@firesprinkler.** org > > >>> <[email protected]>> > > >>> http://fireball.firesprinkler.****org/mailman/listinfo/**** > > >>> sprinklerforum<http://** > > fireball.firesprinkler.org/**mailman/listinfo/** > > >>> sprinklerforum< > > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum> > > >>> > > > >>> > > >>> -------------- next part -------------- > > >> An HTML attachment was scrubbed... > > >> URL:<http://fireball.**firesprinkler.org/mailman/** > > >> > > private/sprinklerforum/**attachments/20111004/53f36606/**attachment. > > html< > > http://fireball.firesprinkler.org/mailman/private/sprinklerforum/att > > achments/20111004/53f36606/attachment.html > > > > > >> > > > >> ______________________________**_________________ > > >> Sprinklerforum mailing list > > >> Sprinklerforum@firesprinkler.**org > > >> <[email protected]> > > >> http://fireball.firesprinkler.**org/mailman/listinfo/**sprinklerf > > >> orum< > > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum> > > >> > > > -------------- next part -------------- An HTML attachment was > > > scrubbed... > > > URL: <http://fireball.**firesprinkler.org/mailman/** > > > private/sprinklerforum/**attachments/20111004/655dd34b/**attachmen > > > t.html< > > http://fireball.firesprinkler.org/mailman/private/sprinklerforum/att > > achments/20111004/655dd34b/attachment.html > > > > > > > > > > > > > ______________________________**_________________ > > > Sprinklerforum mailing list > > > Sprinklerforum@firesprinkler.**org > > > <[email protected]> > > > http://fireball.firesprinkler.**org/mailman/listinfo/**sprinklerfo > > > rum< > > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum> > > > > > -------------- next part -------------- An HTML attachment was > > scrubbed... > > URL: < > > http://fireball.firesprinkler.org/mailman/private/sprinklerforum/att > > achments/20111004/f0f671e9/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 > > 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/atta > chments/20111004/688b0b17/attachment.html> > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum
