Have found those as well, but was looking for ASME/ANSI documentation. Have enough for now - looks like ASTM A53 B Sch. 40 will get me to at least 430psi working pressure in 4" and 696psi in 6". Test pressures รท 4 could yield 475psi for 4", but that's a little fuzzy. We're looking at single and two zone options for a 47-story building ...
Thanks and happy weekend to all, SML -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Ed Vining Sent: Friday, February 01, 2013 12:45 PM To: Mike Cabral; [email protected] Subject: Re: Working pressure rating of pipe There are lots of steel pipe working pressures in articles on the Internet at "schedule 40 steel pipe working pressure." Ed Vining 4819 John Muir Rd Martinez CA 94553 925-228-8792 Cell 925-787-0465 On Fri, Feb 1, 2013 at 11:12 AM, Mike Cabral <[email protected]>wrote: > > > The working pressure for pipe listed for fire sprinkler is dependent > on the listing for the pipe. According to published ASTM A53 Grade B > and or > A106 Grade B Seamless ANSI B31.1 pressure rating to this standard are > much higher than the ratings given by UL or FM. For example 1" sch 40 > has a working pressure of 2,100 psi with a burst pressure of 12,100 > psi when tested to the above mentioned Standard. > > UL and FM test to different standards and the pressure rating is > established in accordance to their own testing requirements. > > If a manufacture wants a 300 psi rating UL will test the pipe at a > pressure 5 times the working pressure requested (the safety factor). > So 300 psi X 5 =1,500 psi for a given time which I think is one minute > without rupture. > > FM has a safety factor of 4 to 1. 300 psi X 4 = 1,200 psi without rupture. > > All components used in sprinkler systems are subject to this method. > > Below is a link to a pdf document of Pressure Ratings of steel pipe. > > http://www.kalhour.com/downloads/psi_chart_as_per_pipe_wt.pdf > > > Mike Cabral > Phone 636-451-0533 > Cell 314-412-1800 > e-Fax 636-438-1338 > > > ----- Original Message ----- > From: Richard Mote <[email protected]> > To: "[email protected]" > <[email protected]> > Cc: > Sent: Friday, February 1, 2013 12:28 PM > Subject: RE: Working pressure rating of pipe > > Per my handy dandy Pocket Ref 2nd Edition page 350; For Schedule 40 > Steel Pipe > > 1/8" - 1" continuous weld or seamless = 700 psi 1-1/4" - 3" continuous > weld = 800 psi 3-1/2" - 4" continuous weld = 1200 psi 2" - 12" > electric weld = 1000 to 1300 psi 1-1/4" 3" seamless = 1000 psi 3" - > 12" seamless = 1000 - 1300 psi > > > > Richard L. Mote ET > Designer > Rowe Sprinkler Systems, Inc. > > -----Original Message----- > From: [email protected] [mailto: > [email protected]] On Behalf Of Johnson, Duane > (NIH/OD/ORS) [C] > Sent: Friday, February 01, 2013 12:50 PM > To: '[email protected]' > Subject: Re: Working pressure rating of pipe > > Also depends on joining method, see NFPA 13:6.3.e and 6.3.3. > > ----- Original Message ----- > From: Johnson, Duane (NIH/OD/ORS) [C] > Sent: Friday, February 01, 2013 12:42 PM > To: '[email protected]' > <[email protected]> > Subject: Re: Working pressure rating of pipe > > It will be in accordance with the ASTM ANSI standard it was mfg to. > > ----- Original Message ----- > From: Steve Leyton [mailto:[email protected]] > Sent: Friday, February 01, 2013 12:38 PM > To: [email protected] > <[email protected]> > Subject: Working pressure rating of pipe > > Does anyone know where I can find working pressure ratings for Sch. 40 > and Sch. 80 pipe? For years, we've just used Sch. 40 on high pressure > portions of standpipes, but I got to wondering about what sprinkler > piping is actually rated for. Just off the phone with Allied, and > their listed Sch. 10 and 40 both rated 300psi. So if I can use Sch. > 10 up to 300, my little brain goes on to reason that 40 should get me > higher, but then perhaps not. What about 80? Do we have to go > seamless to get higher still? I'm looking for documented, listed, > approved, underwritten ... more than just an anecdotal citation. > > > Steve Leyton > > _______________________________________________ > 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 > _______________________________________________ > 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/attac > hments/20130201/07e98d20/attachment.html > > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > -------------- next part -------------- An HTML attachment was scrubbed... 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