Using the same information and the modified Darcy- Weisbach equation:

Hf = .031xfxLxQ,,

d5

Frictional factor is the same - .0216

Length is the same - 4000 ft

Q,, = 700 x 700 = 490,000

Figure 1-2 = 42,196

.031x.0216x4,000x490,000 = 1312416 = 31.102853

42,196

42,196

= 31 ft

You can see that the frictional head loss is the same using either of the

two equations.

12-16

QM 5099

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