The mainline pipeline runs from northwest Alberta in Canada to the area of Chicago, Illinois in the United States. Numerous lateral pipelines from northeast British Columbia and northwest Alberta feed gas into the main pipeline. A computer analysis of the cathodic protection attenuation and voltage gradients was made. Rectifier and groundbed installations are to be located at compressor stations and main line block valve sites. Deep anode groundbeds are being used exclusively, so an analysis of subsurface geology was conducted. A computer analysis of AC induction was completed in areas where the pipeline parallels high voltage transmission lines.

Subject
Electric current, Piping, Voltage, Cathodic protection, Valves, Groundbeds, Pipelines, Soil resistivity, Transmission lines, Rectifiers, Attenuation, Construction, Anodes
Keywords:
AC induction, attenuation, cathodic protection, deep anode groundbeds, gas transmission pipeline, high pressure gas pipeline, impressed current rectifiers, subsurface geology, voltage gradient
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2000
Association for Materials Protection and Performance (AMPP)
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