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Experts in cathodic protection for oil and gas pipelines, please help resolve this issue

2009-04-03View Original

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Is it problematic for the pipeline if the AC component of the output current from the constant voltage device is too high? What should be the range of potential for natural gas pipelines when measured using the power-off method? (Currently, the potential of our pipelines is -1.19 when powered; once the power is turned off, it immediately changes to the natural potential of -0.5. Is such a rapid change normal?) ) Please help everyone. This post was last edited by sf1982 on 2009-4-5 at 15:57.]

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