Why foam? It's only applicable in certain instances where you have chemical commodities that aren't miscible or can not be controlled or suppressed with water alone.
I don't have an NFPA 30 that far back on hand, 2000 is the oldest we've got laying around. But to go from a wet, tree system to a foam-water system is not necessarily going to be one of "minimal reconfiguration". Typically foam-water requires less water so your hydraulics are going to need total evaluation, plus heads may or may not be compatible with the foam-water system so they may need to be changed out. There are a lot of variables need to be defined and analyzed. Do you have the design criteria for the original? Was it actually designed for chemical storage back then? 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 -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Jim Johnston Sent: Thursday, August 27, 2009 12:09 PM To: [email protected] Subject: NFPA 30 Does anybody have a copy of NFPA 30 from 1994 or earlier era? I have a warehouse storing plastic IBC Totes (275 Gal) with Class II & IIIA liquids, in double row racks - 4 levels high. The original system was installed in 1994 by another contractor as a tree at the roof and single level of protection in the racks, today an insurance guy would like them to protect with foam utilizing the existing system with minimal reconfiguration, problem is it will not calc out. Based on 2008 NFPA 30, the original design criteria is nowhere close to being acceptable by today's standards. If anybody can help me out it would be much appreciated, please contact me off forum. Thanks, Jim Johnston, P.E. Fire Protection Engineer Inland Fire Protection, Inc 1100 Ahtanum Road Yakima, WA 98903 Phone 509-248-4471 or 800-742-6156 Fax 509-248-1180 [email protected] _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum
