We did that 30 years ago. Drilled a hole with a hole saw and mounted a mech tee on it with a plug in it. With the recovered coupon we did some quick forensic analysis and determined it to be sound. Then we pressurized it to 200 psi and succeeded in proving it suitable for continued service.
Mark at Aero 602 820-7894 Sent from my iPhone > On Feb 28, 2015, at 4:08 PM, "Steve Leyton" <[email protected]> > wrote: > > To Scott's point, some Sch. 10 is rated/listed for 300 psi but not all and I > would DEFINITELY want more info before putting high pressure on vintage 1976 > lightwall. There are different grades of ASTM piping; I did a search last > year and found Sch. 40 rated from 400-600 psi depending on parent metal class > and diameter. > > So I would try to research the installed material first, using the mill > markings for reference. Or hydro at working pressure + 50. Or replace with > material you know for sure is rated/listed for your WP. > > Steve L. > > > > > > <div>-------- Original message --------</div><div>From: Alexandre Lupien > <[email protected]> </div><div>Date:02/28/2015 2:45 PM (GMT-08:00) > </div><div>To: [email protected] </div><div>Subject: RE: > Hi-pressure welded schedule 10 joints & fittings </div><div> > </div>I didn't assume any conclusion. I just wanted to discuss about my issue > on the forum. > I agree that maybe I should have take more time to explain. > Sorry for the inconvenience > >> From: [email protected] >> To: [email protected] >> Subject: RE: Hi-pressure welded schedule 10 joints & fittings >> Date: Sat, 28 Feb 2015 22:18:24 +0000 >> >> Wow Alex. You didn't provide any of that information in you initial post. >> >> Based upon the information Tim provided, how do you leap to the conclusions >> and assumptions that you made? >> >> I would think a little more research might have to go into this before you >> finalize your modifications. >> >> Scott >> >> Office: (763) 425-1001 x 12 >> Cell: (612) 759-5556 >> >> -----Original Message----- >> From: Sprinklerforum [mailto:[email protected]] >> On Behalf Of Alexandre Lupien >> Sent: Saturday, February 28, 2015 1:58 PM >> To: [email protected] >> Subject: RE: Hi-pressure welded schedule 10 joints & fittings >> >> Hi Tom >> >> Thanks for your answer. >> >> I was familiar with these aspects and this confirm it. >> I wanted to make sure that an existing standpipe system dated of 1976 in a >> condo building of 21 floors was able to withstand the new fire pump >> requirements at churn. The standpipe seems to be made entirely of welded >> joints (with a min. of schedule 10 piping I assume). In this case, I guess, >> only the hose connections will have to be replaced by pressure reducing >> valves. >> >> Alex >> >>> From: [email protected] >>> To: [email protected] >>> Subject: RE: Hi-pressure welded schedule 10 joints & fittings >>> Date: Sat, 28 Feb 2015 13:59:18 -0500 >>> >>> Alex, >>> >>> Refer to NFPA 13, 2010, 6.3.2. for Schedule 10 and 40. >>> >>> You can also check with the major sprinkler system component Suppliers >>> and their vendors for Specs on the material. >>> >>> Regards, >>> G. Tim Stone >>> >>> G. Tim Stone Consulting, LLC >>> NICET Level III Engineering Technician Fire Protection Sprinkler >>> Design and Consulting Services >>> >>> 117 Old Stage Rd. - Essex Jct., VT. 05452 >>> CELL: (802) 373-0638 TEL: (802) 434-2968 Fax: (802) 434-4343 >>> [email protected] >>> >>> -----Original Message----- >>> From: Sprinklerforum >>> [mailto:[email protected]] >>> On Behalf Of Alexandre Lupien >>> Sent: Saturday, February 28, 2015 1:51 PM >>> To: [email protected] >>> Subject: Hi-pressure welded schedule 10 joints & fittings >>> >>> Hi, >>> >>> I would like to know if schedule 10 piping with welded joints and >>> fittings are approved to withstand hi-pressure (300 lbs) for a >>> standpipe system. If not, what about schedule 40. >>> Can you refer to the standard mentioning this. >>> >>> Thanks >>> >>> _______________________________________________ >>> Sprinklerforum mailing list >>> [email protected] >>> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkl >>> er.org >>> >>> _______________________________________________ >>> Sprinklerforum mailing list >>> [email protected] >>> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkl >>> er.org >> >> _______________________________________________ >> Sprinklerforum mailing list >> [email protected] >> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org >> _______________________________________________ >> Sprinklerforum mailing list >> [email protected] >> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
