(1)
0 - 2000
Laminar (smooth and well defined)
2000 - 4000
Transitional (not smooth)
4000 - UP
Turbulent (chaotic, not defined)
In a multiproduct pipeline, a turbulent flow is desired, as it reduces the size of the interface by reducing
the amount of product mixing during flow.
of the pipe and of the Reynold's number. The friction factor is determined by using Reynold's number,
nominal pipe size, and Figure C-8, FM 5-482,
(a)
Given the following information, determine the friction factor.
R = 8.0 x 104
4 in nominal pipe size
(FM 5-482, Figure C-8)
F = .021
(3) Determine head loss due to friction (Hf). The Darcy-Weisbach equation is used to
determine Hf. As with the Reynold's Number, this equation has two formulas: Design and Modified as
shown below in the figures:
Figure 1-5. Darcy-Weisbach Design Model Equation
Figure 1-6. Darcy-Weisbach Design Model Equation
1-16
QM5203
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