Pipeline Coating Conductance Measurement Through CP Rectifier Influence: Validation And Improvements (C2026-00199)
Wednesday, March 18, 2026
11:00 AM - 11:30 AM Central
Location: 372 EF
Earn .5 PDH
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A previous paper presented the Rectifier Influence Coating Conductance (RICC) survey, a method of evaluating a pipeline's attenuation factor ('alpha') by interrupting a rectifier and measuring its IR influence along the length of a pipeline. This attenuation factor can then be used to calculate the pipeline's specific coating conductance, which is normally assumed but is a critical input to cathodic protection design and pipeline modelling tasks. This paper presents findings from a second survey on overlapping and new sections of the same pipeline as was previously studied. Key topics include a year-over-year comparison of measured attenuation factors, a sensitivity analysis in the calculation of specific coating conductance, and the impact of certain edge cases and how to mitigate them during the field survey or analysis, with an overall objective of enhancing the robustness of the alpha determination and demonstrating its reliability and limitations. The authors measured multiple rectifiers' IR influence during a single survey through sequential rectifier interruption and potential data recording to enhance measurement accuracy and improve survey speed.
