Back in the old days when the Red Book 13 fit in my back pocket; there was a detail that I recall had called out for the sch 80 or Extra Heavy 1/2" nipple.I think it had to be a close or a space nipple. Did that often in many of the old textile mills in New England as manufacturing space was converted to office space. It was all old pipe sch systems with 3/4" feeding the last head. Replaced thousands of those 3/4" lines. It was a hot item for FM back then late 60's early 70's.
Mike Cabral ________________________________ From: Bill Shipman <[email protected]> To: [email protected] Sent: Friday, September 6, 2013 8:41 AM Subject: Re: Shoulder Nipple As an "Old Time Fitter" from the early 70's to the 90's before I got into design, I was taught to use Sch 80 nipples for the additional strength that they had over the standard Sch 40. On 9/6/2013 5:53 AM, Bobby Gillett wrote: > Duane, > > As I mentioned, I was going off of memory. Not sure where exactly the Sch. > > 80 came from, maybe it was an old requirement for seismic areas before the > > limitation of 1" diameter nipples was enforced?? May have been a company > requirement before that as where I was before was in a "seismic zone"...not > quite sure. Anybody else out there ever hear of that? > > > > Bobby Gillett > *Living Water Fire Protection, LLC* > 1160 McKenzie Rd. > Cantonment, FL 32533 > (850) 937-1850 > livingwaterfp.com <http://livingwaterfp.com/> > > > On Fri, Sep 6, 2013 at 5:31 AM, Johnson, Duane (NIH/OD/ORS) [C] < > [email protected]> wrote: > >> They are using an existing 1/2" outlet (likely an upright) to supply a >> relocated sprinkler (likely a pendent)...completely legitimate. >> >> 8.15.20.4.1 (2013) When pipe schedule systems are revamped, a nipple >> not exceeding 4 in. (100 mm) in length shall be permitted to be installed >> in the branch line fitting. >> 8.15.20.4.2 All piping other than the nipple permitted in 8.15.20.4.1 >> and 8.15.20.4.3 shall be a minimum of 1 in. (25 mm) in diameter in >> accordance with Figure 8.15.20.4.2. >> 8.15.20.4.3 When it is necessary to pipe two new ceiling sprinklers >> from an existing outlet in an overhead system, the use of a nipple not >> exceeding 4 in. (100 mm) in length and of the same pipe thread size as the >> existing outlet shall be permitted, provided that a hydraulic calculation >> verifies that the design flow rate will be achieved in accordance with >> Figure 8.15.20.4.3. >> 8.15.20.4.4 Where an armover is attached to connect to a sprinkler, the >> use of pipe nipples less than 1 in. (25 mm) in diameter shall not be >> permitted where seismic design is required on the system. >> >> By the way, where did the sch 80 requirement come from? I have never been >> able to locate that in code. >> >> Duane Johnson, PE >> Program Manager >> Division of the Fire Marshal (Contractor) >> Office of Research Services >> National Institutes of Health >> 301-496-0487 >> >> "Protecting Science - One Sprinkler at a Time" >> >> >> -----Original Message----- >> From: Bobby Gillett [mailto:[email protected]] >> Sent: Thursday, September 05, 2013 10:46 PM >> To: [email protected] >> Subject: Re: Shoulder Nipple >> >> Hoping they are requesting sch 80 and they are not in a seismic zone. >> >> Sent from my iPhone >> >> On Sep 5, 2013, at 9:12 PM, "JSM Fire Pro" <[email protected]> wrote: >> >>> You’re a third party glancing over a bill of materials for an >>> add/relocate day job. You notice one of the line items is calling for >> several ½” >>> shoulder nipples. >>> >>> >>> >>> What goes through your mind? >>> >>> >>> >>> J. Scott Mitchell, PE >>> >>> B&W Technical Services Pantex >>> >>> _______________________________________________ >>> 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 > > > ----- > No virus found in this message. > Checked by AVG - www.avg.com > Version: 2013.0.3392 / Virus Database: 3222/6641 - Release Date: 09/05/13 > > > _______________________________________________ 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
