Galvanized FDC and historians. Was the thinking here that if the FDC fails the system still works?
Bv Sent from my Motorola ATRIX™ 4G on AT&T -----Original message----- From: Mark Sornsin <[email protected]> To: "[email protected]" <[email protected]> Sent: Mon, Jul 30, 2012 22:59:44 GMT+00:00 Subject: RE: Galvanized underground main Greg: NFPA 13 forbids steel pipe underground, with the exception of 'dry' FDC piping. In that case you are allowed to use galvanized. Don't recall all of the specifics (like if wrapping is required). But to your point the problem is corrosion - the galvanizing doesn't help much underground. However, I don't know why a properly wrapped pipe couldn't do just fine underground. Except that 'properly wrapped' may be too difficult to achieve...? There may be too much risk of an Achilles heel in the form of an unprotected surface somewhere along the run. So how about cut-grooved ductile iron instead? Mark A. Sornsin, PE| Fire Protection Engineer Ulteig Engineers, Inc.| Fargo, ND [email protected] -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Gregory Lindholm Sent: Monday, July 30, 2012 3:10 PM To: SprinklerFORUM Subject: Galvanized underground main I think I have seen this before, but could not find it. We need to run a wet main underground from one building to another. They are about 15' apart. The main will be 7' deep to get below frost. We plan to run 3" galv. sch. 40 with galv. grooved fittings. There will only be 2 ell & 4 couplings underground, and plan to wrap it with what the plumber use to wrap underground. Is there anything wrong with this idea, either code or common sense? Greg Lindholm -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://fireball.firesprinkler.org/mailman/private/sprinklerforum/attachments/20120730/e7a4d52d/attachment.html> _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://fireball.firesprinkler.org/mailman/private/sprinklerforum/attachments/20120730/9ae3df90/attachment.html> _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum
