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How to Calculate Launder Slopes

A pipe launder is often used to move large quantities of water or sewage from one place to another in city developments. These pipes can feature customized mill designs within the inner piping to assist in directing this flow efficiently. In order to optimize the flow potential within a pipe launder, you must consider the slope of the piping. You can calculate the launder slope of a pipe by using a complex equation that incorporates the pipe's height, length, diameter and velocity of fluid.

Pencil
Paper
Calculator
Tape measure
Pipe launder
Water

Instructions

Calculate Launder Slope
- 1
  Determine the inner height of your pipe launder by using the tape measure. Record this measurement in conventional U.S. or metric values.
- 2
  Determine the length of the pipe launder section using the tape measure. Record this measurement value in the same units you used to determine height.
- 3
  Calculate the volume of the cylinder piping by using the equation bh = pi * r^2 * h, where b= base, h= height, pi= the value of pi (3.14) and r= radius of the piping.
- 4
  Calculate slope of the launder by using equation Slope = (n * V * Rh(-2/3))^2, where slope is height/length, V is m/s and Rh is in meters.

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