Friction Loss Per Floor

Due to the pressure requirements standpipes.

Friction loss per floor.

Today tribometry figures heavily into floor safety. Thus the friction loss per 100 feet of 1 inch hose when flowing 95 gpm is 14 psi. Feet of head pressure loss per 100 ft. Ten feet is multiplied by 434 psi the pressure it takes to raise a column of water one foot which equals 4 34 psi round up to 5 and there you go.

Friction loss fl c q2 l pdp np fl al ep np nozzle pressure 100 psi combination 80 psi smooth bore master 50 psi do not asmooth bore handheld al appliance loss 10 psi wye siamese 15 psi deck gun 25 psi portable monitor 25 psi stand pipe 75 psi aerial ladder dd elevation ep elevation pressure. 4 x 4 x 2 4 36 x 0 4 14 4 or 15 pounds fl per 100 feet of hose. The following table gives flow rate q such that friction loss per unit length δp l si kg m 2 s 2 is 0 082 0 245 and 0 816 respectively for a variety of nominal duct sizes. Compute the friction loss for one line of 3 hose delivering 400 gpm a.

Slips and falls happen when the coefficient of friction cof between the two surfaces is insufficient. Using 1 pipe flowing at 5 gpm you would lose 1 72 feet of head pressure per hundred feet. Compute the friction loss for one line of 2 hose delivering 400 gpm a. For a 200 foot line your friction loss is 28.

It is a loss of flowing pressure in a pipeline due to friction from the pipe walls or as the liquid flows through elbows valves and fittings. 4 x 4 x 2 4 36 pounds fl per 100 feet. The three values chosen for friction loss correspond to in us units inch water column per 100 feet 0 01 03 and 0 1. It works the same way for the other gallonage settings.

Friction loss flow charts. The first type is static head loss due to the elevation of part of a pipeline above its source such as in the high floors of a building. Based on friction loss municipal water supply and pressure loss for the height of the standpipe a fire pump may need to be designed into the system.