Calibration of Coating Area Resistance Assumptions in AC Interference Studies Using Real-Time Field Data (C2026-00127)
Wednesday, March 18, 2026
9:30 AM - 10:00 AM Central
Location: 372 EF
Earn .5 PDH
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An alternating current (AC) interference study was conducted on an existing multi-pipe right-of-way in which the baseline model results varied significantly from readings collected in the field. After a thorough investigation, coating quality assumptions were found to be the primary cause of the discrepancy. Due to the challenges associated with making accurate coating quality estimates on aging infrastructure with a variety of coating types and vintages, real-time field data was used to calibrate the assumptions in the study and ensure the predicted results aligned with real-world measurements. This approach allowed integrity risks and personnel safety hazards to be more accurately quantified and added a measure of validation to the design process that has historically been challenging to achieve. An appropriately sized mitigation design was completed, addressing the concerns identified during the study while avoiding unnecessary construction costs. This paper discusses the approach to this method.
