Using the hand method, for each 100-foot length of 1¾-inch hose flowing 200 gpm, the friction loss is 48 psi: 2 x 4 x 6 = 48 psi. For a 3-inch supply line flowing 300 gpm, the friction loss per 100-foot section would be 9 psi: 3 squared equals 9 psi.Click to see full answer. In this way, how much friction do you lose in a fire hose?Friction loss = 8 psi per 100 feet of hose. what is the friction loss in 5 inch fire hose? The friction loss for five-inch line flowing 500 gpm is roughly two psi. Also, what is the friction loss formula? In mechanical systems such as internal combustion engines, the term refers to the power lost by overcoming friction between two moving surfaces. friction loss = friction loss coefficient * ( flow rate / 100) 2 * hose length /100. FL = C* (Q/100)2 *L/100.What is the flow rate of a fire hose?The 1 1/2-inch double jacket fire hose provides 5.06 gallons per minute per dry pound of hose (150 GPM / 29.6 lbs dry = 5.06 GPM/pound). While 150 GPM may be plenty in many situations, this hose trades ease of use for lower flow rates.
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