§192.457. External corrosion control: Buried or submerged pipelines installed before August 1, 1971. — Inbound Citations

(G) Perform a coating survey of the eligible Class 3 segment and remediate in accordance with the requirements in § 192.461(f) through (h) if any of the following in paragraphs (a)(4)(i)(1) through (5) are present:

(1) Ineffective external coating, as defined in § 192.457;

(2) Adequacy of cathodic protection is measured using a minimum negative (cathodic) polarization voltage shift of 100 millivolts in accordance with paragraph I.A.(3) of appendix D to this part;

(3) Linear anodes are required to maintain cathodic protection in accordance with § 192.463;

(4) Tape wraps or shrink sleeves; or

(5) A history of shielding pipe from cathodic protection.

(e) After the initial evaluation required by §§ 192.455(b) and (c) and 192.457(b), each operator must, not less than every 3 years at intervals not exceeding 39 months, reevaluate its unprotected pipelines and cathodically protect them in accordance with this subpart in areas in which active corrosion is found. The operator must determine the areas of active corrosion by electrical survey. However, on distribution lines and where an electrical survey is impractical on transmission lines, areas of active corrosion may be determined by other means that include review and analysis of leak repair and inspection records, corrosion monitoring records, exposed pipe inspection records, and the pipeline environment.