NFPA 219 flow testing hydrants, 25% drop
NFPA 219 flow testing hydrants, 25% drop
(OP)
Hi,Im trying to comply with the 25% drop in residual\static specified in NFPA 219 when carrying out hydrant flow testing. example below
Remote static 158 psi
hydrant 1 open with residual 154psi and flow 2627 lpm
hydrant 2 open with residual 140psi and total flow (x2 hyds)4735 lpm
hydrant 3 open with residual 116psi and total flow (x3 hyds)6545 lpm
total flow 6545 x (158-20)0.54 / (158-116)0.54 = 6545 x 138 0.54/42 0.54 = 9320 lpm Is this correct?
also
if I had a fire pump with a gauge that showed 170psi and the pump gauge drops whilst opening the hydrants, should I include this in my theoretical calc? if so how?
Thanks for any help





RE: NFPA 219 flow testing hydrants, 25% drop
RE: NFPA 219 flow testing hydrants, 25% drop
RE: NFPA 219 flow testing hydrants, 25% drop
On the line and do not know if it is figured in
I think you may have a good representation of the water supply
RE: NFPA 219 flow testing hydrants, 25% drop
""" to flow the total demand necessary for fire-fighting purposes"""""
what is your demand you need??
RE: NFPA 219 flow testing hydrants, 25% drop
RE: NFPA 219 flow testing hydrants, 25% drop
RE: NFPA 219 flow testing hydrants, 25% drop
RE: NFPA 219 flow testing hydrants, 25% drop
http://www.nfpa.org/aboutthecodes/list_of_codes_and_standards.asp
RE: NFPA 219 flow testing hydrants, 25% drop
Slip of the typing finger, it would appear.