Equivalent length of pipe

Total equivalent length of pipe (assuming that every fitting has an average 5 m of equivalent pipe length, to account for friction) = 1000 + 25 X 5... 

Tlie following table gives equivalent lengths of pipe for various fittings. 

Lp is the equivalent length of pipe size d, length L , after conversion to basis of reference diameter, d . 

L(,q = Equivalent length of pipe plus equivalent length of fittings, valves, etc., ft. 

L = equivalent length of pipe, ft BC = tube length for sensible heating. Figure 10-110, ft CD = tube length for vaporization, ft. Figure 10-110 G = mass velocity, lb/ (sec) (ft )... 

AZ = height of driving leg for thermal circulation, ft Wx = mass rate, Ib /sec, total flow, or W Wj = shaft work done by system, ft liquid A = change from one condition to another AL[ = change in equivalent length of pipe, ft, inlet piping system... 

L = equivalent length of pipe, ft 7 = acceleration loss group, dimensionless... 

L = length of straight tube for heat transfer (or, nominal tube length), ft or, length of path, ft or, length or thickness of coil or jacket, ft or, superficial liquid mass velocity, lb/ (hr) (ft ) or, equivalent length of pipe, ft or, thickness of insulation, in. 

You must specify a pump to deliver 800 bbl/day of a 35°API distillate at 90°F from a distillation column to a storage tank in a refinery. If the level in the tank is 20 ft above that in the column, the total equivalent length of pipe is 900 ft, and both the column and tank are at atmospheric pressure, what horsepower would... 

Friction due to fittings, valves and other disturbances of flow in pipe lines is accounted for by the concepts of either their equivalent lengths of pipe or multiples of the velocity head. Accordingly, the pressure drop equation assumes either of the forms... 

The pressure loss through the bends and check valves can be included in the line pressure-loss calculations as an equivalent length of pipe . The equivalent-length recommendations are taken from Ref. P1 (p.164). All the bends are assumed to be 90 elbows of standard radius, and the isolation valves as plug-type valves. 

FIGURE 6.5 Equivalent length of pipe fittings and valves. (Crane Co.)... 

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