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/attachments/20130201/07e98d20/attachment.html > > > _______________________________________________ > 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/attachments/20130201/ff6921b8/attachment.html> _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum
