A maximum realistic manual hand line flow is 350 GPM. There are some that have proven empirically that 500 can be flowed, that is not realistic to the ordinary operator of an engine and the folks on the nozzle. It works in a more controlled environment, but not the typical fire ground.
The "typical" fog nozzle is 250 GPM at 100 psi and with the modern advances in hose technology and materials the old friction losses are a bit less than the old cotton jacket days. The 1 1/8" tip solid stream is 262 GPM at 50 PSI. The real world is plus/minus 10-15% on most hydraulics on the fire ground when you factor in gauge accuracy, actual friction losses, elevation changes and nozzle. If the hose is connected to a master stream, the flow is directly proportional to the length but you could be around 600 GPM max on a 2 1/2" line at 100 feet. Best Regards, Tim Tim Frankenberg, CT, CFPS Fire Product Manager Potter Electric Signal Company, LLC 5757 Phantom Drive, Ste. 125 Hazelwood, MO 63042-2429 800-325-3936 www.pottersignal.com -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Tom Wellen Sent: Thursday, April 03, 2014 11:42 AM To: [email protected] Subject: Re: actual hose flow Like Steve said, it depends. Here is a brochure link that may help. http://www.elkhartbrass.com/files/aa/downloads/catalog/catalog-f2-01-08.pdf There's 2.5 in. hose and there are 2.5 in. couplings with 3 in. hose. All kinds of nozzles from adjustable to smooth bore tips from 1/2 in. to 2 in. The hose and hose monitors we carried had both adjustable nozzles and stackable smooth bore tips. Then the pump operator may use preset pressures or manual throttles. It depends on the fire and yes, it's a wrestling match and not a one man job unless it is the ground monitor. Tom On Apr 3, 2014, at 11:20 AM, "Steve Leyton" <[email protected]> wrote: > Obviously, there are countless situational variables, but I have been > told anecdotally that a 2 1/2" line when used on attack can be used > anywhere in the range of 150-400 gpm. At the high end, it's a > wrestling match and only used for outside streams. > > SL > > > > > > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of > Todd - Work > Sent: Thursday, April 03, 2014 9:18 AM > To: [email protected] > Subject: actual hose flow > > I know we assume a 250 gpm flow for a single fire hose. What is the > actual amount of water that is discharged from a 2-1/2" fire hose in a > fire situation? > > Todd G Williams, PE > Fire Protection Design/Consulting > Stonington, CT > www.fpdc.com > 860-535-2080 (ofc) > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkl > er > .org > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkl > er.org _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
