Alan: Just to be clear - this pipe is now being located such that it drains to a conditioned space below grade (the sprinkler controls room) - there will be no trapped water. Therefore it is not different than above-ground pipe as far as the amount of moisture it will see.
Mark A. Sornsin, PE Fire Protection Engineer Ulteig Engineers, Inc. Fargo, ND 701.280.8591 [EMAIL PROTECTED] -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Allan Seidel Sent: Thursday, April 19, 2007 10:47 PM To: [email protected] Subject: Re: Underground Dry Pipe Have you guys even seen the inside of a galvanized sprinkler system that trapped water? It is much easier to replace the pipe when it is above grade. Wrap the pipe all you want but this pipe will rust out from the inside if it not bone dry inside all the time. We are pumping nice moist air into it and we do have to flow it out to some point once a year. It won't be dug up and replaced when it fails. It will be run visible. I think this pipe needs to be copper or DI. Contrary to conventional wisdom, stainless can do some very unexpected things when buried. Allan Seidel St. Louis, MO On Apr 19, 2007, at 5:23 PM, Mark Sornsin wrote: > One other key point (I think) is that this underground pipe will be > pressurized with air - it's for a dry system. > > How about going with copper? > _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field)
