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TM0109 Aboveground Survey Techniques for the Evaluation of Underground Pipeline Coating Condition

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Revision Date: May 11, 2009
Updated On: July 24, 2012
Editorial Change:
New in 2009. Presents various techniques for aboveground evaluation of the coating condition of underground metallic pipelines, including the alternating current (AC) attenuation survey, direct current (DC) survey, AC-voltage gradient survey, and the Pearson survey. This standard is specifically intended to address buried onshore metallic pipelines and is based on available technology and methods that have successfully demonstrated evaluation of the coating condition of buried pipelines.

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