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Paper

Energy: Oil & Gas

Cathodic Protection

Session: Cathodic Protection Monitoring (Part II of II)

Towards Development of Coating Selection, Inspection, Maintenance, and Repair Guidelines from Cathodic Protection Data (C2026-00156)

Thursday, March 19, 2026
2:00 PM - 2:30 AM Central
Location: 361 AB
Earn .5 PDH
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Naim Dakwar, Sankara Papavinasam, Maan Alamodi, Abdullah Hammoud
Coatings are needed to reduce the current density requirements of cathodic protection (CP). More regulations now require correlation between CP current and coating performance. For instance, USA PHMSA now requires use of aboveground monitoring techniques to ensure that coatings are perfect before application of CP on new pipelines. PHMSA also requires recording of CP rectifier current output 6 times per year.
This paper will summarize standards (API RP1160 and API RP1176), AMPP (NACE SP0169), ISO (ISO 12473), and CSA (CGI OCC 1), best practices from oil and gas producers, pipeline operators, and coating manufacturer/applicators on criteria on cathodic protection (CP) current density (CD) requirements and on the type and frequency of inspection (as described in NACE SP0502, SP0204, and SP0210) to understand pipelines coating condition (DCVG, ACVG, and PCM) as well as effectiveness of CP (CIS).
The objective of this paper is to correlate CP current, DCVG, ACVG, PCM and CIS data to establish conditions in which: 1. both CP and coatings are effective; 2. maintenance of coatings is required (i.e. spot repair of coating or joint re-coating) to enable effective CP application; and 3. replacement of coatings (re-coating of entire pipeline or section) is required for effective CP application.