We already have individual standpipe tests that produce 600 gpm +/- at 60-65 psi. The question is how do we design a test that meets the 25 requirements given the various ages and designs of the system?
At 03:26 PM 12/29/2011, you wrote: >Todd- >If the intent of NFPA 25 and this test is to confirm the stuff actually works, >it might be a great time to find out what the pipe scheduled standpipes will >produce- >Better to know soon, rather than find out when there's a fire in an >unsprinklered area (since that's the same area where these old standpipes will >be, Murphy's Law of Cascading Catastrophes) what the FD can expect to get out >of these, and if they blow apart or not. > > >George L. Church, Jr., CET >Rowe Sprinkler Systems, Inc. >PO Box 407, Middleburg, PA 17842 >877-324-ROWE 570-837-6335 fax >[email protected] > > > >-----Original Message----- >From: [email protected] >[mailto:[email protected]] On Behalf Of Todd Williams >Sent: Thursday, December 29, 2011 2:59 PM >To: [email protected] >Subject: Re: NFPA 25 standpipe test > >Exactly what I am dealing with. Quite honestly, if I saw something that said >flow the most remote hose outlet, I would only flow one outlet at 250 gpm. I >would not from that surmise that they wanted to recreate an acceptance test, >if one was ever done. The hospital dates from at least 1912, although I don't >know when each section was built. There was a major expansion in 2005 when >they added a second fire pump and increase the area by about 40%. > >So would the correct procedure be to go through and date each standpipe and >figure out how each was sized. Those that are pipe schedule could be left >alone, the pre 1993 need to be tested to 1250 gpm (partially sprinklered) and >65 psi at the top outlet and those from 2005 tested at 1000 gpm (fully >sprinklered) at 100 psi? > >Is there anything other than handbook commentary that details exact testing >procedures? We are using 2002 standards. > > > >At 10:12 AM 12/29/2011, you wrote: >>The confusion started when 25 said flow the most remote hose >>connection. Some focused on the fact that it used the singular tense >>verses plural so obviously they only had to flow from ONE outlet and >>since an outlet only has to flow 250 gpm THAT was the amount to flow >>for the test. DOH! >> >>Roland >> >>On Dec 29, 2011, at 6:14 AM, Todd Williams wrote: >> >>>I am working with a hospital with a total of 9 standpipes. There are >>>standpipes that are both pre and post 1993. The original building is >>>partially sprinklered and the new section is fully sprinklered. >>> >>>1. Is the intent of NFPA 25 that multiple standpipes be flowed >>>simultaneously to meet the 1250 gpm demand? >>> >>>2. Should the two sections of the hospital be flow independent of each >>>other? >>> >>>3. If yes to 1 and 2, could the new section be flowed as a fully >>>sprinklered building (thus 1000 gpm) as opposed to 1250? >>> >>>4. How should i handle pipe schedule standpipes, if any exist? >>> >>>I haven't had to deal with 5 year standpipe tests before. >>> >>>Todd G. Williams, PE >>>Fire Protection Design/Consulting >>>Stonington, CT >>>860.535.2080 >>>www.fpdc.com >>> >>>_______________________________________________ >>>Sprinklerforum mailing list >>>[email protected] >>>http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum >> >>_______________________________________________ >>Sprinklerforum mailing list >>[email protected] >>http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > >Todd G. Williams, PE >Fire Protection Design/Consulting >Stonington, CT >860.535.2080 >www.fpdc.com > >_______________________________________________ >Sprinklerforum mailing list >[email protected] >http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum >_______________________________________________ >Sprinklerforum mailing list >[email protected] >http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum Todd G. Williams, PE Fire Protection Design/Consulting Stonington, CT 860.535.2080 www.fpdc.com _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum
