Well, there it is in 2010 (wish you had referenced edition Cory and not just section).
On Tue, Oct 4, 2011 at 3:13 PM, Cory Power <[email protected]> wrote: > NFPA 13 Table 7.2.3.6.1 Dry Pipe System Water Delivery > > States Ordinary Hazard group 1 to have 2 most remote sprinklers initially > open with 50 second water delivery time > > > -- > 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 7:38 PM, Ron Greenman wrote: > >> I'm afraid you always use the single smallest orifice in the system as you >> IT test orifice and one only, no matter the hazard. The objective is to >> insure that trip time or alarm initiation occurs within the allotted time >> if only one head of the smallest orifice type in the system is flowing. >> >> On Tue, Oct 4, 2011 at 2:57 PM, Cory Power<[email protected]> wrote: >> >> Doesn't Ordinary Hazard require two flowing heads? >>> >>> >>> -- >>> 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 7:24 PM, Ron Greenman wrote: >>> >>> This may be a dumb question but if it's a system with 5.6K heads as the >>>> smallest orifice then it needs to alarm (AV) with one head flowing or >>>> trip >>>> (DPV) with one head flowing. Why would you have two heads for the IT? >>>> >>>> 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://inkler.org/mailman/****> >>>>>>> < >>>>>>> http://firesprinkler.org/****mailman/**<http://firesprinkler.org/**mailman/**> >>>>>>> <http://**firesprinkler.org/mailman/**<http://firesprinkler.org/mailman/**> >>>>>>> > >>>>>>> private/sprinklerforum/********attachments/20111004/c48f4ae4/****** >>>>>>> **attachment.html<http://****fir**eball.firesprinkler.org/******<http://eball.firesprinkler.org/****> >>>>>>> mailman/private/<http://**fireball.firesprinkler.org/**** >>>>>>> mailman/private/<http://fireball.firesprinkler.org/**mailman/private/> >>>>>>> > >>>>>>> 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**sprinklerforum/attachments/**20111004/58b8f241/attachment.**html<http://fireball.firesprinkler.org/mailman/private/sprinklerforum/attachments/20111004/58b8f241/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/20111004/6c14f08e/**attachment.html<http://fireball.firesprinkler.org/mailman/private/sprinklerforum/attachments/20111004/6c14f08e/attachment.html> > > > > ______________________________**_________________ > Sprinklerforum mailing list > Sprinklerforum@firesprinkler.**org <[email protected]> > http://fireball.firesprinkler.**org/mailman/listinfo/**sprinklerforum<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/attachments/20111004/1c4465a6/attachment.html> _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum
