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
