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Answer: There's 69.75 PSI friction loss for a 200 foot of 1.75 inch hose with 150 GPM....Example: Coefficient TableDiameterCoefficient1 ¾ inch15.52 inch82 ½ inch210 more rows
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.
Flow Rate (GPM) A 200 foot length of 2.5 inch hose flowing 300 GPM has 36 PSI friction loss.
This is the pressure that will move the water through the supply hose to the pumper at the fireground. The friction loss in four-inch hose flowing 500 gpm is approximately five psi.
This is the pressure that will move the water through the supply hose to the pumper at the fireground. The friction loss in four-inch hose flowing 500 gpm is approximately five psi.
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People also ask

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. Memorizing this much simpler than it sounds.
A 200 foot length of 2.5 inch hose flowing 300 GPM has 36 PSI friction loss.
Answer: There's 69.75 PSI friction loss for a 200 foot of 1.75 inch hose with 150 GPM....Example: Coefficient TableDiameterCoefficient1 ¾ inch15.52 inch82 ½ inch210 more rows
When you need to calculate friction loss, find your desired gpm and multiply by 12. If you need 125 gpm on 100 feet of hose, that corresponds to number 2 on your finger. Multiply 2 by 12 to get 24; your friction loss is 24 psi.
Friction loss varies with type, lining, weave, quality, and age of the hose. Friction loss increases 4 times for each doubling of water flow. Reducing the diameter of a hose by 1/2 will increase the friction loss by a factor of 32 for the same flow.

fire hose friction loss formula