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Title: Stress On Buried Pipelines
Author: Roy W. Daines
Source: American Gas Association 1991
Year Published: 1991
Abstract: The focus of this article will be to study the stress on a buried pipeline as a result of internal pressure and external loading. In calculating the secondary stresses we will concentrate on the effects of the following: Earth loads Earth and vehicle loads for flexible pavements and Earth and vehicle loads for rigid pavements. Corridors were chosen for the construction of high pressure pipelines which carried these facilities through wooded areas, over steep country sides and across many farm fields. Today these same corridors are subject to construction of major roadways, high-rise developments and subdivision construction. The expense to relocate these gas facilities requires the developer to work with the pipeline engineer in determining an acceptable design for both. Another major concern of the pipeline engineer is the requirement for cased crossings by railroads and various governmental agencies. In 1982 tests were conducted in Racine, Wisconsin in a cooperative effort between IGT and Wisconsin Highway Department. These tests concluded that the existing equations to be discussed in this article give conservative figures and that no industry model exists today to accurately predict the magnitude and direction of the principal stresses in a pressurized buried pipeline. However, the use of the existing equations will result in safe designs.

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