I believe the prohibition is based on the concept that the threads on 1/2 nipples or fittings are too weak, when subject to the bending forces applied by a cantilevered weight as found in a goose necked drop to likely survive a seismic event. The 4" nipple max has to do with limiting the hydraulic degradation in a pope schedule scenario that has just been left as written before Wass gave us a way to calculate a system.
Sent from my iPhone > On Jan 17, 2014, at 3:19 PM, Forest Wilson Fire Sprinkler Contractor > <[email protected]> wrote: > > I dont underatand how a fitting would be considered a pipe nipple. > The prohibition against using 1/2" pipe in earthquake zones should not apply > to the use of street l fittings. > > If it did, then the same argument could could made against using any 1/2" > fitting. > > > Forest Wilson > Fire Sprinkler Contractor > 937-736-0425 > > Notice: > This message is confidential. It may also be privileged or otherwise > protected by work product immunity or other legal rules. If you have received > it by mistake, please let us know by e-mail reply and delete it from your > system; you may not copy this message or disclose its contents to anyone. > Please send us by fax any message containing deadlines as incoming e-mails > are not screened for response deadlines. The integrity and security of this > message cannot be guaranteed on the Internet. > > -------- Original message -------- > From: Ron Greenman <[email protected]> > Date:01/17/2014 5:33 PM (GMT-05:00) > To: [email protected] > Subject: Re: "Street" elbows > > I thought this was about using 1" st ells in a tight spot, not changing > uprights to pendants. And of course you can use them and they're readily > available through plumbing suppliers if your sprinkler supplier doesn't have > them. They come in reducing types, in black steel, galvy, stainless, bronze, > and in weights (strength) equivalent to schedule 40, 80, 120 & 160. Very > common for industrial boiler application. > > Sent from my iPhone > >> On Jan 17, 2014, at 2:23 PM, Todd - Work <[email protected]> wrote: >> >> Charles, I would be careful. You can't use 1/2" nipples in an earthquake >> zone (8.15.19.4.4). Given your proximity to Charleston, this may be a >> concern. I would assume street elbows (if permitted) would fall under the >> same category. >> >> Todd G Williams, PE >> Fire Protection Design/Consulting >> Stonington, CT >> www.fpdc.com >> 860-535-2080 (ofc) >> >>> On Jan 17, 2014, at 5:05 PM, Kenneth Berman <[email protected]> >>> wrote: >>> >>> close nipples are as close as street ells. 1/2 x 1/2 x 1 tees and you can >>> leave the uprights, or for tight spaces where you can eliminate the >>> upright, use 1 x 1 x 1/2 with a 1" plug. >>> >>> >>> On Fri, Jan 17, 2014 at 3:54 PM, Charles Thurston <[email protected]>wrote: >>> >>>> Hello All, >>>> >>>> I do wish I could find some 1/2" Male x 1" Female Street ells for a >>>> upright to pendant conversion project. >>>> >>>> Friday, January 17, 2014, 4:25:23 PM, you wrote: >>>> >>>>> I think it comes down to if the street elbows are made according to >>>>> the appropriate ASTM standard from Table 6.4.1. In your defense, >>>>> 6.4.6.1 states that unless circumstances exist where hex bushings >>>>> are allowed, one piece reducer fittings shall be used for a change in >>>> pipe size. >>>> >>>>> Todd G Williams, PE >>>>> Fire Protection Design/Consulting >>>>> Stonington, CT >>>>> www.fpdc.com >>>>> 860-535-2080 (ofc) >>>> >>>>>> On Jan 17, 2014, at 3:43 PM, "Morey, Mike" <[email protected]> wrote: >>>> >>>>>> So I seem to remember this being a "no-no" but the code doesn't seem to >>>> explicitly prohibit us from using them. I have a tight squeeze where a 1" >>>> male x female "street" elbow would be helpful, but I want to make sure I'm >>>> not missing something in 13 that prohibits it, we use the 2010 edition. >>>> >>>> >>>>>> Mike Morey, CFPS, SET >>>>>> Planner Scheduler/Designer >>>>>> BMWC Constructors, Inc. >>>>>> 1740 W. Michigan St, Indianapolis, IN 46222 >>>>>> O: 317.651.0596 | C: 317.586.8111 >>>>>> [email protected]<mailto:[email protected]> | www.bmwc.com< >>>> http://www.bmwc.com/> >>>>>> _______________________________________________ >>>>>> 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 >>>> >>>> >>>> >>>> -- >>>> Best regards, >>>> Charles Thurston mailto:[email protected] >>>> Systems Design Manager >>>> NICET Certified >>>> >>>> _______________________________________________ >>>> 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 _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
