Chris, "I believe" there are specific prohibitions in some states under their worker safety laws regarding using PVC (I think CPVC too) for compressed air systems. You might want to check about that as it could be construed to include fire sprinkler piping applications. As a suggestion, maybe explore using dielectric couplings before the steel fire sprinkler piping enters the MRI space and a bonded ground system for the piping inside the area? You may find that a ground system is already being planned for other needs in the MRI space and the sprinkler piping could use it too. Good success, Kurt Kingston [EMAIL PROTECTED] Commercial Fire Protection Inc. Mt Vernon, WA 98273
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Thom McMahon Sent: Monday, July 14, 2008 3:02 PM To: [email protected] Subject: RE: MRI preaction vs cpvc Have you considered using "Pro Press" system by VIEGA? You'd need AHJ approval, but no brazing of the copper required. Hydro to 200Psi. 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 Chris Stovall Sent: Monday, July 14, 2008 3:12 PM To: [email protected] Subject: MRI preaction vs cpvc Greetings, Were doing an MRI room for Stanford and I wanted to know if anyone knows where to find info on using cpvc in a preaction system. The 2007 handbook says cpvc can be used with cpvc if low air pressure, timing requirements and manufacture requirements are met. Blazemaster, Havel and Spears all say not to use cpvc in a preaction system. Are the any other cpvc manufactures? The problem is that to use copper the pipe needs to be brazed instead of soldered and the extra heat is most likely going to ruin their lead shielding. The lead shielding is a cloth like material similar to wall paper. I can have an apprentice stand around with some kind of heat shield but it would be safer and probably better if we could use cpvc. Its 2 rooms with 6 heads in each room. _______________________________________________ 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) No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.138 / Virus Database: 270.4.10/1551 - Release Date: 7/14/2008 6:49 AM _______________________________________________ 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)
