We permit dielectric screwed unions for the smaller pipe. If the pipe is larger it has to be an insulating flange connection. We have never allowed the piece of plastic pipe. Don't have a make and model handy but these things are fairly common.
John Hoffman P.E. | Fire Protection Engineer | Facility Engineering Services, KCP, LLC - Burns & McDonnell Engineering | National Nuclear Security Administration's Kansas City Plant | Operated by Honeywell FM&T | 2000 E. 95th St | Kansas City, MO 64131 | ph 816-997-7213 | [email protected] From: Mike Brown <[email protected]> To: [email protected] Date: 03/05/2010 06:16 AM Subject: "SCIF" Wall Penetration Sent by: [email protected] Question I am working on a project where the FPE is asking for a "electrically isolated joint on the sprinkler feed main just inside the wall"? Has anyone had to deal with this before...if so what did you use? 4" Sch. 40 Main. Thanks, Mike Brown _______________________________________________ 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) _______________________________________________ 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)
