Roland, In the Meridian One fire the PRVs were installed as required by the 1984 edition of NFPA 14 which was the legal code at time of conversion from dry to wet standpipe to maintain both flowing and non-flowing pressures to a maximum of 100 psi. The problem was the use of pressure regulating hose nozzles which were incorporated into the Fire Departments high rise operations a few years later.
Jim Davidson Davidson Associates Fire Protection * Medical Gas * Code Consulting 302-994-9500 Fax:302-234-1781 -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Roland Huggins Sent: Friday, December 30, 2011 10:30 AM To: [email protected] Subject: Re: NFPA 25 standpipe test I assume that was a result of the Meridian One fire. To this day, the PRV's are listed as the prime culprit (ie in Wikipedia) instead of saying the city changed their equipment without addressing the older installed systems. I first heard that when I talked with one of the chiefs that investigated the fire but that conclusion was excluded from the reports. Obviously there were multiple problems but it's never a good idea to bring only a knife to a gun fight. Roland On Dec 29, 2011, at 6:43 PM, Steve Leyton wrote: > As an example of how at least one FD has grown to address this wide > range of standpipe performance (sometimes in the same building), > City of San Franciso trucks and engines carry three different types > of tips. If the ones fitting to the hose packs aren't right for a > particular fire, they can go all the way down to low pressure smooth > bore or straight stream. But it starts with knowing what's gonna > come out and the signage is now a prescriptive requirement of both > 13 and 14, and which can be easily retrofitted. > > SML _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum
