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Recent close-interval potential surveys have raised concerns about the accuracy of potential measurements on older, poorly-coated pipelines. Two sources of error were identified: metallic IR-drops and equalization currents.
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New tools for data acquisition and display for the field surveyor, data analyst and pipeline operator as they affect Close Interval Potential Surveys (CIPS) and Direct Current Voltage Gradient (DCVG) surveys
It was proposed to apply a modified external corrosion direct assessment process to a small station. This paper describes the technical approach which was developed in order to overcome the expected challenges.
This paper summarizes the results of ten years of External Corrosion Direct Assessment (ECDA) application on more than 100 projects and includes a number of important lessons learned during the process.