Wouldn't this arrangement cause introduction of fresh oxygen into a large part of the system each time the pump is tested and increase the corrosion that will occur in the piping? NFPA 13(07) seems to frown on this in section A8.17.4.2 for test connections. One more thing to worry about. Dewayne
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Fletcher, Ron Sent: Wednesday, September 19, 2007 3:08 PM To: [email protected] Subject: RE: pump test header location What about money as a reason? Ron Fletcher Aero Automatic Phoenix, AZ -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Wednesday, September 19, 2007 12:58 PM To: [email protected] Subject: RE: pump test header location My one concern with the arrangement that would flow through a system is that the test would occur while the building was occupied and if there was a failure what the consequences could be. Granted it wouldn't be desirable for it to fail in a fire scenario either. Sorry but I just can't see any reason to put it at the end of some bulk main instead of right at the pump. Craig L. Prahl, CET Fire Protection Group Mechanical Department CH2MHILL Lockwood Greene 1500 International Drive PO Box 491, Spartanburg, SC 29304-0491 Direct - 864.599.4102 Fax - 864.599.8439 [EMAIL PROTECTED] http://www.lg.com -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Ed Kramer Sent: Wednesday, September 19, 2007 3:51 PM To: [email protected] Subject: RE: pump test header location In this scenario, yes. I've never considered attaching the test header to anyplace other than between the pump check and shutoff valve, but it seems it may be common practice in some areas. My knee-jerk reaction to pressuring the ENTIRE fire protection system when testing a fire pump is that's its unwise. But what's the worst that's going to happen? The entire system will see pressures in the ball park of 5 psi greater than the jockey pump pressure (but significantly higher when water hammer or pressure waves are a factor) and weak pipe/fittings may blow out (possibly causing extensive damage) and require repair/replacement. Seems to me it's wiser to find & fix weak parts of the system during routine testing than it is to find them during a fire emergency. Having said that, I still prefer the test header be tied in between the pump check & shutoff valve. Makes for a tidy pump package and gives the testing technician the option of pressuring the entire system or not. Ed Kramer Littleton, CO >So you'd be flowing through the underground and whatever sprinkler >system piping just to test a pump? > >Craig L. Prahl, CET >Fire Protection Group >Mechanical Department >CH2MHILL >Lockwood Greene >1500 International Drive >PO Box 491, Spartanburg, SC 29304-0491 Direct - 864.599.4102 Fax - >864.599.8439 [EMAIL PROTECTED] http://www.lg.com >Ron, > >Lets say you got a pump that requires 8" discharge pipe, your sprinkler >bulk main is 6", and you decide to connect the test header to the end >of the bulk main. Have you had any problems getting the test header >calc to work? (never, rarely, sometimes, etc.) > >Ed Kramer >Littleton, CO > > >>It's more common to take the test header off the end of bulk main or >>combine it with the FDC line if the header is remote from the pump >room. >> >>Ron Fletcher >>Aero Automatic >>Phoenix, AZ _______________________________________________ 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) _______________________________________________ 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)
