You know there usually is the alternative of just painting the pipe, we've often painted the inside (yes used mops) of pump supply pipes over 21' so you figure (1) shopdog @ $12 an hour cleaning, priming and painting 100' of 6" sch 10, vs galv sch 10, plus the shop is slow anyway.
On Sat, May 22, 2010 at 9:24 AM, Frans Stoop <[email protected]> wrote: > This is how I did it when we used welded outlets: > > Cut short pipe nipples or use plugs. Nipples are better, because they > let air escape and zinc flow in when the pipes are dipped in the zinc-bath. > > Before screwing the nipples in, apply a little bit of anti-seize > compound on both threads of the outlets and the nipples. > Anti-seize compound is a kind of grease that is used for trucks > (somewhere in the brakes as far as I recall). > It withstands high temperatures, although not upto the temperature of > the melted zinc. > > Remove the nipples after galvanizing. Thanks to the anti-seize > compound this can be done by a less hulky fitter than without the compound. > Restore the thread of the outlet to original condition by a bolt die. > Since most of the original thread is still there, the die doesn't wear > much. > > Hot dip applied zinc even protects bare steel upto a few millimeters > (1/8 to 1/6 inch) next to the galvanized part. > If you need perfect protection: apply zinc-compound to the thread of > the outlets and the pipes before screwing them together. > If you find zinc-compound too labour-intensive: use zinc-spray. > > Frans Stoop > TOS architecture & fire protection > Netherlands <[email protected]> > Tel. +31-24-324 0112 > > > At 10:11 21-5-2010 -0500, you wrote: > >The biggest fitter AND the biggest wrench. > > > >David Autry > >Plans Examiner > >Nebraska State Fire Marshal's Office > >246 S. 14th Street > >Lincoln, NE 68508 > >402-471-9659 > >402-471-3118 fax > >www.sfm.ne.gov > > > >** Note new email address: [email protected] > > > >-----Original Message----- > >From: [email protected] > >[mailto:[email protected]] On Behalf Of Thom > McMahon > >Sent: Friday, May 21, 2010 10:00 AM > >To: [email protected] > >Subject: RE: Galv fittings? > > > >I was thinking of cut to length pieces and holes for MT's. > > > >So how big a wrench did it take to get the plugs out? > > > >Thom McMahon, SET > >Firetech, Inc. > >2560 Copper Ridge Dr > >P.O. Box 882136 > >Steamboat Springs, CO 80488 > >Tel: 970-879-7952 > >Fax: 970-879-7926 > > > >-----Original Message----- > >From: [email protected] > >[mailto:[email protected]] On Behalf Of Autry, > David > >Sent: Friday, May 21, 2010 9:00 AM > >To: [email protected] > >Subject: RE: Galv fittings? > > > >"or have the > >galv. Applied after fab." > > > >This is what I did at a petroleum refinery in Texas. Fabricated black pipe > >with welded outlets, then installed plugs in the outlets, then off to be > >hot-dipped. The plugs were a major challenge to remove. > > > >David Autry > >Plans Examiner > >Nebraska State Fire Marshal's Office > >246 S. 14th Street > >Lincoln, NE 68508 > >402-471-9659 > >402-471-3118 fax > >www.sfm.ne.gov > > > >** Note new email address: [email protected] > > > >-----Original Message----- > >From: [email protected] > >[mailto:[email protected]] On Behalf Of Thom > McMahon > >Sent: Friday, May 21, 2010 9:35 AM > >To: [email protected] > >Subject: RE: Galv fittings? > > > >This gets us back to the point of there really is no good way to have an > >outlet in Galv. Pipe without exposing the raw steel to some extent. > >Threaded, Mech tee, cut to length and roll groove or cut groove. To keep > the > >factory galv. Un-marred you've got to use full length pieces or have the > >galv. Applied after fab. > > > >Thom McMahon, SET > >Firetech, Inc. > >2560 Copper Ridge Dr > >P.O. Box 882136 > >Steamboat Springs, CO 80488 > >Tel: 970-879-7952 > >Fax: 970-879-7926 > > > > > >-----Original Message----- > >From: [email protected] > >[mailto:[email protected]] On Behalf Of George > Church > >Sent: Thursday, May 20, 2010 4:43 PM > >To: [email protected] > >Subject: RE: Galv fittings? > > > >That was in the spec and since our shop does welded outlets, I took it > out. > >Chris, surely you have "insta-galv" spray in your shop, too? > > > >From: [email protected] > >[mailto:[email protected]] On Behalf Of Chris > Cahill > >Sent: Thursday, May 20, 2010 6:24 PM > >To: [email protected] > >Subject: RE: Galv fittings? > > > >So when you want galv pipe o you allow welded outlets? Noting the outlets > >and weld aren't exactly galv even with a coat of paint. > > > >Chris Cahill, P.E. > >Fire Protection Engineer > >Sentry Fire Protection, Inc. > > > >763-658-4483 > >763-658-4921 fax > > > >Email: [email protected] > > > >Mail: P.O. Box 69 > > Waverly, MN 55390 > > > >Location: 4439 Hwy 12 SW > > Waverly, MN 55390 > > > >-----Original Message----- > >From: [email protected] > >[mailto:[email protected]] On Behalf Of > >[email protected] > >Sent: Thursday, May 20, 2010 4:00 PM > >To: [email protected] > >Subject: Re: Galv fittings? > > > >Chris, > >I understand your plight and even I don't require screwed galvanized > >fittings. We all know how difficult it is to thread pipe into them. > >However, why are they made? Is there really a market for them? Not to > >mention that newly threaded pipe has threads exposed that are not > >galvanized. The only place that I have seen these required is on cooling > >towers. > > > >Thank You > > > >Rahe Loftin, P.E. > >Region 7 - GSA > >Office - 817-978-7299 > >Fax - 817-978-8644 > >Cell - 817-371-3102 > > > > "Chris Cahill" > > <chr...@sentryfir > To > > emn.com> <[email protected] > > > > Sent by: > cc > > sprinklerforum-bo > > un...@firesprinkl > Subject > > er.org Galv fittings? > > > > 05/20/2010 03:49 > > PM > > > > Please respond to > > sprinklerfo...@fi > > resprinkler.org > > > >How often do you see galv fittings required on galv piping? Usually > >ductile > >or cast are permitted aren't they? Don't ask where just know your tax > >dollars are being put to good use - NOT! SIPA in a 20k office building > >with > >galv required on both. We're not talking some secret agency or historic > >where wet paper is an issue. Yes they have a smoke detector in each room. > >I can't make this stuff up I'm just not that creative. > > > >Chris Cahill, P.E. > >Fire Protection Engineer > >Sentry Fire Protection, Inc. > > > >763-658-4483 > >763-658-4921 fax > > > >Email: [email protected] > > > >Mail: P.O. Box 69 > > Waverly, MN 55390 > > > >Location: 4439 Hwy 12 SW > > Waverly, MN 55390 > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > > For Technical Assistance, send an email to: [email protected] > > To Unsubscribe, send an email > to:[email protected]<to%[email protected]> > (Put the word unsubscribe in the subject field) > -- Tom Poisal, CET _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field)
