1 cubic metre / sec = 13,200 gallons / min (UK gallon)
1 lb / square inch = 2.3 ft of water = 0.7 kg / sq . cm
1) Velocity of water, V (ft / sec) = (Gallons / min) / ( 2 x D x D)
(where, D = Pipe ID in inches)
2) Weight of water (lbs) = D x D x L
( where, D = Pipe ID in inches, L = Pipe length in Yards)
3) Water Horse Power = (G x H) / 3,300
(where, G = Gallons/min, H = head in feet)
Source - MPOB
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