Oil and gas pipelines are exposed to electromagnetic fields produced by both natural (geomagnetic disturbances) and man-mad e (ac power) sources. The resulting induced currents can affect cathodic protection system operation and contribute to pipeline corrosion[1]. To evaluate the significance of these problems we have developed a model of electromagnetic induction in a multi-layered cylinder, that includes the electromagnetic properties of each pipeline layer and surrounding media. This model is used to examine the electromagnetic response of different types of pipelines buried in soil.

Subject
Piping, Cylinders, Modeling, Permeability, Walls, Impedance, Pipelines, Waves, Transmission lines, Contours, Steel, Line current, Conductivity
Keywords:
ac-induction, geomagnetic induction, telluric currents, pipeline modeling
Government work published by the Association for Materials Protection and Performance (AMPP) with permission of the author(s). Positions and opinions advanced in this work are those of the author(s) and not necessarily those of AMPP. Responsibility for the content of the work lies solely with the author(s).
2004
GOV
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