And we are now talking in the rarefied atmosphere of what may or may not happen-what are the extremes. The original question had to do with listings and ratings of pipe in the real world of application, not the will it work beyond the rules. Wet CPVC in light hazard under smooth flat ceilings can be exposed. Any other configuration is verboten. If it's in an interstitial combustible space it cannot protect itself except with heads specifically listed to do so. Otherwise it needs to be protected by separate lines of a metallic nature.
On Thu, Dec 16, 2010 at 8:40 AM, <[email protected]> wrote: > True but the question here is, what IS the maximum containment pressure the > vessel will sustain before failure? > > Plus smart or not, I think there was mention of drinking, so that negates any > smart moves. ;) > > Craig L. Prahl, CET > Fire Protection > CH2MHILL > Lockwood Greene > 1500 International Drive > Spartanburg, SC 29304-0491 > Direct - 864.599.4102 > Fax - 864.599.8439 > CH2MHILL Extension 74102 > [email protected] > > > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Todd - FPDC > Sent: Thursday, December 16, 2010 11:32 AM > To: [email protected] > Subject: Re: Concealed plastic pipe > > If a contained vessel has a liquid inside, which is heated, the vapor > pressure will build up until it exceeds the max containment of the vessel. At > this point, it will rupture. It's called a BLEVE. If the container is > Completely filled, it might impact the pressure build-up. Still, not a smart > move IMHO. > > Sent from my iPhone > > On Dec 16, 2010, at 10:38 AM, <[email protected]> wrote: > >> Would the pipe have exploded or since it was heated may it have expanded >> enough in order not to fail? >> >> >> >> Craig L. Prahl, CET >> Fire Protection >> CH2MHILL >> Lockwood Greene >> 1500 International Drive >> Spartanburg, SC 29304-0491 >> Direct - 864.599.4102 >> Fax - 864.599.8439 >> CH2MHILL Extension 74102 >> [email protected] >> >> >> >> -----Original Message----- >> From: [email protected] >> [mailto:[email protected]] On Behalf Of Ron Greenman >> Sent: Thursday, December 16, 2010 10:33 AM >> To: [email protected] >> Subject: Re: Concealed plastic pipe >> >> I have put a turbo torch on PVC electrical boxes for a sustained >> period and they will only support flame with direct impingement. At >> the end of the test they are charred, sometimes slightly deformed, but >> always intact. >> >> On Thu, Dec 16, 2010 at 7:04 AM, Todd - FPDC <[email protected]> wrote: >>> Uh... If there wasn't a hole somewhere to relieve the pressure, it could >>> have exploded. I have my doubts. >>> >>> Sent from my iPhone >>> >>> On Dec 16, 2010, at 9:54 AM, "Richardson, R" <[email protected]> >>> wrote: >>> >>>> I have a friend who claimed to have filled a small section of CPVC >>>> sprinkler pipe with water, capped it, threw it into the campfire, then >>>> went back to drinking. The following morning the pipe was intact amongst >>>> the ashes the next day. Could be a BS story, I don't know. >>>> >>>> Rich Richardson >>>> Seattle Fire Department >>>> >>>> -----Original Message----- >>>> From: [email protected] >>>> [mailto:[email protected]] On Behalf Of Dan Arbel >>>> Sent: Thursday, December 16, 2010 04:39 >>>> To: [email protected] >>>> Subject: RE: Concealed plastic pipe >>>> >>>> Probably when exposed to fire it is protected by the water spray whilst >>>> above the tiles there is no immediate direct exposure no spray protection >>>> was afforded. >>>> >>>> Dan >>>> >>>> http://www.riskmanage.com >>>> Dan Arbel >>>> T+972-4-8243337; >>>> F+972-4-8243278; >>>> M+972-52-2810593 >>>> M+972-52-6611337, >>>> >>>> -----Original Message----- >>>> From: [email protected] >>>> [mailto:[email protected]] On Behalf Of Geir Jensen >>>> Sent: 16 December, 2010 2:03 PM >>>> To: [email protected] >>>> Subject: Concealed plastic pipe >>>> >>>> We are assessing a case of plastic sprinkler pipework in concealed space. >>>> There is an issue of correct listing or not. This is under European >>>> standards, however fairly similar to NFPA 13. >>>> >>>> What I want to know: What is the actual risk of using plastic wet sprinkler >>>> pipe in a lowered ceiling space, given a listing as exposed plastic wet >>>> sprinkler pipe? Maybe no concerns? I read NFPA 13 Annex A6.3.6 on this >>>> and >>>> cannot really get my head around. Why is there a risk of removed ceiling >>>> tile when the pipework is elsewhere directly exposed to fire? >>>> >>>> Geir Jensen >>>> COWI Fire >>>> Technical Director >>>> >>>> >>>> _______________________________________________ >>>> Sprinklerforum mailing list >>>> [email protected] >>>> http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum >>>> >>>> For Technical Assistance, send an email to: [email protected] >>>> >>>> To Unsubscribe, send an email to:[email protected] >>>> (Put the word unsubscribe in the subject field) >>>> >>>> _______________________________________________ >>>> Sprinklerforum mailing list >>>> [email protected] >>>> http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum >>>> >>>> For Technical Assistance, send an email to: [email protected] >>>> >>>> To Unsubscribe, send an email to:[email protected] >>>> (Put the word unsubscribe in the subject field) >>>> _______________________________________________ >>>> Sprinklerforum mailing list >>>> [email protected] >>>> http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum >>>> >>>> For Technical Assistance, send an email to: [email protected] >>>> >>>> To Unsubscribe, send an email to:[email protected] >>>> (Put the word unsubscribe in the subject field) >>> _______________________________________________ >>> Sprinklerforum mailing list >>> [email protected] >>> http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum >>> >>> For Technical Assistance, send an email to: [email protected] >>> >>> To Unsubscribe, send an email to:[email protected] >>> (Put the word unsubscribe in the subject field) >>> >> >> >> >> -- >> 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: >> AFSA, SFPE, ASCET, NFPA, NFSA, AFAA, ASEE, NIBS, WSAFM, WFC >> >> They are happy men whose natures sort with their vocations. -Francis >> Bacon, essayist, philosopher, and statesman (1561-1626) >> _______________________________________________ >> Sprinklerforum mailing list >> [email protected] >> http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum >> >> For Technical Assistance, send an email to: [email protected] >> >> To Unsubscribe, send an email to:[email protected] >> (Put the word unsubscribe in the subject field) >> _______________________________________________ >> Sprinklerforum mailing list >> [email protected] >> http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum >> >> For Technical Assistance, send an email to: [email protected] >> >> To Unsubscribe, send an email to:[email protected] >> (Put the word unsubscribe in the subject field) > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > > For Technical Assistance, send an email to: [email protected] > > To Unsubscribe, send an email to:[email protected] > (Put the word unsubscribe in the subject field) > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > > For Technical Assistance, send an email to: [email protected] > > To Unsubscribe, send an email to:[email protected] > (Put the word unsubscribe in the subject field) > -- 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: AFSA, SFPE, ASCET, NFPA, NFSA, AFAA, ASEE, NIBS, WSAFM, WFC They are happy men whose natures sort with their vocations. -Francis Bacon, essayist, philosopher, and statesman (1561-1626) _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field)
