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Title: Problems Associated With Pipelines Occupying Joint- Use-Corridors With Overhead Ac Transmission Lines
Author: A. Akhtar
Source: American Gas Association 1981
Year Published: 1981
Abstract: An overview is presented of the problems associated with pipelines occupying jointuse- corridors with overhead AC transmission lines. Accurate analytical models are available for the prediction of electromagnetically induced potential and current in the pipe due to load current and fault current in the transmission line. Mitigation measures are also known for the protection of pipeline equipment and personnel from the induced voltage hazard. The induced AC potential appears to have an insignificant corrosion enhancement effect on a pipe with conventional cathodic protection system. Ground fault currents entering the pipe, however, can cause serious damage to the pipe. Factors affecting the extent of fault current reaching the pipe are discussed.

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