5.

Elevation and Pressure - the following procedures are taken to adjust for elevation differences, the basic

equation is for level pipe.

a. Elevation difference between the upstream and downstream points of a pipeline. Pressure readings

between the two points of the pipeline are taken from pressure gages and reflect the pressure at what ever the

elevation may be.

Example 1:

Upstream elevation - 800 feet,

Downstream elevation - 850 feet.

Example 2:

Upstream - 225 psi.

Downstream - 195 psi.

b. To adjust pressure for elevation the following steps are taken.

Formula: The equation for determining pressure loss due to elevation.

c. To determine pressure based on elevation the following equation is used.