This is for a freezer storage area in a food manufacturing plant. They originally specified stainless steel ATR with no more than 3in of thread showing but accepted galvanized ATR instead since the piping is galvanized. They won't allow ATR with any kind of plastic coating on it. Unfortunately, I have yet to find a supplier of smooth rod stock that is pre-galvanized and this job is a rush so I may have to go with stainless anyways.
-----Original Message----- From: Sprinklerforum [mailto:[email protected]] On Behalf Of Mark Eckard Sent: Wednesday, August 05, 2015 1:06 PM To: [email protected] Subject: RE: smooth ATR In a clean room/food processing application I've had to use slick stainless rod, threaded on site & they allowed no visible threads showing (so dust couldn't collect on the ATR threads). However, the system was exposed. So dust could collect on the pipe & Sprinklers. -----Original Message----- From: Sprinklerforum [mailto:[email protected]] On Behalf Of Richard Carr Sent: Wednesday, August 05, 2015 1:42 PM To: [email protected] Subject: RE: smooth ATR We use to install rod covers, plastic sleeve that you cut for the length of the rod. Richard Carr, SET Branch Manager Cox Fire Protection, Inc 6555 Grace Lane. Jacksonville, Fl. 32205 [email protected] 904-781-8227 -----Original Message----- From: Sprinklerforum [mailto:[email protected]] On Behalf Of Morey, Mike Sent: Wednesday, August 05, 2015 1:38 PM To: [email protected] Subject: Re: smooth ATR In the GMP (food and pharma) world at least it's for cleanliness. They want everything to be wipe-down ready as much as possible. Less little threads in the rod, less places for dust (including dangerous chemical dust) to accumulate and later have to be cleaned off. 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] | www.bmwc.com ________________________________________ From: Sprinklerforum <[email protected]> on behalf of rongreenman . <[email protected]> Sent: Wednesday, August 5, 2015 1:29 PM To: [email protected] Subject: Re: smooth ATR I'm chuckling thinking of the logic behind this. They want only the last three inches threaded presumably because it weakens the rod (determined from that old school where the rod was site threaded and threading too much was a waste of time and not a strength issue). They want galvanized or cadmium rod presumably for corrosion protection. But now the suspected weakest part has had the plating cut through so not only is it weaker than the rest of the rod but also sans protection. And somehow this is better than ATR plated or dipped after threading. I wonder if someone will pull cold galving it after the fact. Or tar. On Wed, Aug 5, 2015 at 6:53 AM, Morey, Mike <[email protected]> wrote: > GMP facilities are all this way, though most of them are also > stainless only for hanger material, so you may want to check into that. > > 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] | www.bmwc.com > > ________________________________________ > From: Sprinklerforum <[email protected]> > on behalf of Tom Duross <[email protected]> > Sent: Wednesday, August 5, 2015 9:49 AM > To: [email protected] > Subject: RE: smooth ATR > > Fastenal, great supplier. Must be real old school, that's the way > fitters used to do it, thread their own rod. > TD > > -----Original Message----- > From: Sprinklerforum [mailto: > [email protected]] On Behalf Of Dewayne > Martinez > Sent: Wednesday, August 05, 2015 9:49 AM > To: [email protected] > Subject: smooth ATR > > Anyone know of a supplier of non-threaded galvanized or cadnium plated > rod stock? We have a job which has a requirement for only the last > 3in of the rod to be threaded and they won't allow dipped rod. > > Thanks, > > Dewayne > > > _______________________________________________ > 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 > -- Ron Greenman Instructor Fire Protection Engineering Technology Bates Technical College 1101 So. Yakima Ave. Tacoma, WA 98405 [email protected] http://www.bates.ctc.edu/fireprotection/ 253.680.7346 253.576.9700 (cell) Member: ASEE, SFPE, ASCET, NFPA, AFSA, NFSA, AFAA, NIBS, WSAFM, WFC, WFSC They are happy men whose natures sort with their vocations. -Francis Bacon, essayist, philosopher, and statesman (1561-1626) A problem well stated is a problem half solved. -Charles F. 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