I have a project where the complete underground plan has not been
provided, yet.
What I do have is a fire pump house with a recent fire pump test.
The fire pump house is about 2,100 feet from the project site. It is
elevated about 54 feet higher as well.
I do have the underground loop around the building, so I was going to
use the connection point at the loop for the underground from the pump
house as the source point.
The pump test shows 152 psi @ 0 gpm and 101 psi @ 1500 gpm.
The elevation gain in pressure is 23.38 psi.
The friction loss through the 2,100 feet of pipe and 16 or so fittings
and valves, totals 2,372 feet.
This came out to 21.24 psi of friction loss, assuming 800 gpm of flow
including 250 gpm hose.
I'm adding the elevation gain and subtracting the friction loss from the
pump test.
This leaves me with 154.14 psi @ 0 gpm and 103.14 psi @ 1500 gpm.
I'm just going to use the numbers from the pump test and re-verify
everything at a future date.
Does this sound reasonable?
--
/Thank you,
Bob Knight, CET III//
/*/Fire by Knight, LLC/*/
//208-318-3057/
FIREBYKNIGHT
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