Case Study – Optimizing AC Mitigation for Existing Assets (C2026-00038)
Wednesday, March 18, 2026
8:30 AM - 9:00 AM Central
Location: 372 EF
Earn .5 PDH
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A field-based AC interference study was conducted after elevated AC voltages were reported by Company personnel on several natural gas lines in Ontario, Canada. The study findings were used in conjunction with ILI data to install AC coupons, DC coupons and ER probes at 11 locations considered under risk of AC corrosion. Modelling results were combined with the field results, AC coupon records and ILI data to design the AC mitigation system. This paper describes the methodology used in integrating all the data to optimize the system, resulting in a reduction of more than 30% in the amount of mitigation compared with a standard design.
