I have always just done cowboy math to give them a rough idea of delivery time. Volume of system piping/demand gpm=approximate time (500 gallon volume/1000 gpm demand = .5x60=30 seconds) to get water to the last generator. There will typically be at least one timed discharge test with just water and another with foam so the calculated time is really of no consequence.
They usually want to see the flow for the overhead sprinkler system "simulated" during the HEF test by discharging the calculated supply gpm from the test header. It can be a little tricky if the pull station used to activate the system also starts the pumps. We would flow the test header before the test and wire the valve handles in position after the required flow was achieved. Then close the test header control valve. When the deluge valve tripped for the test we would quickly open the test header control valve to simulate both HEF and sprinkler flow together. Ron F -----Original Message----- From: Sprinklerforum [mailto:[email protected]] On Behalf Of Fairchild, Jack Sent: Friday, January 30, 2015 12:31 PM To: [email protected] Subject: RE: foam delivery times I met with Mike Mohomet and the rest of the sprinkFDT group while working on my Great Adventure analysis. They told me the programs listing limited them to four heads. Jack Fairchild _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
