I am working on a warehouse which presently has very inadequate protection. One of the improvements needed is a fire pump. I have two options: a 1500 at 95 or a 2000 at 80. We can't go over the 95 psi or we end up with a churn pressure over 175 psi. However, the flow drops to 20 psi at 2400 gpm. The ESFR system I am recommending requires about 1950 gpm, including hose streams (the fire pump will have to supply hose streams as well). I want to use the 2000 gpm pump because it gives me better hydraulics, however, I can't test to 150% flow. NFPA 25 says "If available suction supplies do not allow flowing of 150 percent of the rated pump capacity, the fire pump shall be permitted to operate at maximum allowable discharge." Has anyone successfully presented this to an insurance company and Fire Marshal on a new installation and got them to go along? Any hints on how to present it?
Todd G. Williams, PE Fire Protection Design/Consulting Stonington, Connecticut www.fpdc.com 860.535.2080 _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum
