Fire flow calculation using EPANET
Fire flow calculation using EPANET
(OP)
I used to do fire flow calculations by hand previously but now we have to move to software. I work on to ensure sufficient fire flow on small project sites. I tried working using EPANET but it needs to have reservoir in design. But, in my case I just design based on a supply line from city mains. I have Pipe size as 6 in. throughout and the connection to mains have elevation of 159 ft. Static pressure, residual pressure and simulation discharge is 74 psi, 57 psi and 2000 gpm respectively. I have to maintain 20 psi to the furthest hydrant. Please tell me process to do it. Do you know of any manual or videos to design?





RE: Fire flow calculation using EPANET
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RE: Fire flow calculation using EPANET
Thank you for your kind reply. I did create a design as you said. In the pump design, I created two points as (74,0) and (57,2000) but could not figure out the third point. Yes, my minimum requirement is 20 psi. Could you please help me with this? I tried using FireFlow also but do not know what value to give for Flow Interval.
Thnak you!
RE: Fire flow calculation using EPANET
Use 10 gpm or something similar for Flow Interval in FireFlow - essentially it analyzes your model node-by-node, increasing the demand by that Flow Interval until a node in the model violates the Minimum Pressure specified. If you set the interval too small the run takes a lot longer.
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