All: I've had opportunity to use install these in the pulp industry in another life, and have seen them in my current place. I assume Steve is describing a set up like this:
Flange by Flange ftg. Drop bolts in first to ensure its ready. Clean flange, and tools, then hands. We used acetone from the lab to clean our wrenches. Now I know it does burn. Not a good idea. Then rubber (probably some kind of plastic) gloves. Bolts, flange, and steel washers are normal. If bolts are barely long enough with normal washers, go up one length. Special non-conductive gaskets, and washers are used to provide the isolation. But the real parts that take a little messing with are the sleeves that go around the bolts. The need to be just shorter than the distance between the faces of the flanges after makeup. We always had another fitter, and the operator check them afterwords. This is not a place to try to be productive. 100% was the only acceptable level. The operator had to check something off some form or report. The goal was to prevent the adjacent tank from exploding. Then make sure you get something on the wrenches so the don't rust. Yours, Bruce V. ----- Original Message ----- From: "steve" <[email protected]> To: "AFSA" <[email protected]> Sent: Friday, March 5, 2010 8:29:23 AM GMT -08:00 US/Canada Pacific Subject: Re: "SCIF" Wall Penetration Is this at the service entry? You can use a dielectric flange kit at that point or, as Geo said a dielectric union. SL ------Original Message------ From: Mike Brown Sender: [email protected] To: AFSA ReplyTo: AFSA Subject: "SCIF" Wall Penetration Sent: Mar 5, 2010 4:15 AM 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) Sent from my Verizon Wireless BlackBerry _______________________________________________ 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)
