Thanks for the information. What did you do for the 300psi limit on pipe?
Sent from my iPhone > On Aug 2, 2016, at 6:36 PM, Steve Leyton <[email protected]> wrote: > > We made 360 total head at churn if I recall correctly. Everything downstream > UL (USA) listed for fire – had to hunt down check and butterfly valves from > Victaulic rated for 365. Here in CA all high-rises have tanks, so PSH of > about 7’ + pump rating at max churn. Big pump yes, but not a monster as it > was only a 750. We had three or four stairs in the basement and podium > levels, so designed to a couple of points on the curve. We’ve done foam > underwing systems for Navy and Marine Corp hangars with .17/15,000 flowing > concurrently at the roof with total demand of 4,500-5,000 GPM. Now THOSE > are big pumps. > > SL > > From: Sprinklerforum [mailto:[email protected]] > On Behalf Of Tom Duross > Sent: Tuesday, August 02, 2016 4:21 PM > To: [email protected] > Subject: RE: HIGH RISE BUILDING > > Must have been one hell of a pump. > > > There is no height limit in latest editions of NFPA 14. Standpipes that > directly supply hose connections are limited to 350 PSI (stay tuned for 2019 > cycle on that one) but there is no height or pressure limit on express mains > that serve upper zones. Our firm designed a 545’ single zone system for a > tower here in San Diego. > > The foregoing is my opinion only and is not intended to represent the NFPA 14 > Technical Committee, nor serve as an interpretation of the standard. > > Steve L. > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
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