I guess my whole point was when we adopt standards by reference, there may be un-intended consequences. The bladder tank is supplied by the same source of pressure on both sides of the bladder, and it is only the venture effect that lowers the outlet side under flow conditions to allow the proportioner to work.
As Ron stated the tank is under no greater pressure than the rest of the system, which isn't required to be ASME, but I'm sure that at some point ASME was the way to ensure a certain level of "Quality" and safety for what could be hazard if improperly designed or installed vessels were allowed. 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 [email protected] Sent: Monday, December 07, 2009 7:58 AM To: [email protected] Subject: foam-water bladder tank pressure safety valve Does a State Boiler inspector have any jurisdiction over a foam-water bladder tank? Question has come to surface concerning the requirement for a pressure safety valve on the tank, when it's required (which apparently is always according to the inspector it must be ASME labeled.) Site residual pressure is 130 psi, static is 160psi , system is fed by diesel fire pumps, private loop. Pumps have PRV's on them. Is this guy out of his element? Anyone actually ever completed and submitted pressure relief valve calculations with a submittal? This is the first time I've ever had any inspector question this issue. Craig L. Prahl, CET Fire Protection Specialist 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.ch2m.com _______________________________________________ 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)
