Chapter 10C

10C. Pipe Capacity using Equations 10.21 or 10.22 Back to Main

This page is used to determine the line capacity at a given pressure drop. A plot of friction factor vs. Re. using trial and error can determine this however, a direct solution is possible. A direct solution for line capacity is possible by algebraic manipulation of the basic equations.

Solving for "q" yields

For small pipe, (10.21)

For large pipe, (10.22)

Where: d = diameter

q = volumetric flow rate

r = density

m = viscosity

L = length of line

gc = mass/force conversion constant

DPf = friction pressure drop

The units are defined as those listed on page 321. To carry out the line capacity calculation the Liquid viscosity, Liquid density, Pipe length, Inside diameter, and Friction pressure loss of the fluid must be entered into their entry space. To do so use the mouse to click the curser in their entry spaces and input the data. Once this has been done, select Run to execute the solution.

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