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Interpretation Response #PI-92-062

Below is the interpretation response detail and a list of regulations sections applicable to this response.

Interpretation Response Details

Response Publish Date: 11-23-1992
Company Name: Arizona Corporation Commission    Individual Name: Dan H. Weaklend
Location state: AZ    Country: US

View the Interpretation Document

Response text:

November 23, 1992

Mr. Dan H. Weaklend
Chief, Pipeline Safety Utilities Division
Arizona Corporation Commission
1200 W. Washington Street
Phoenix, AZ 85007

Dear Mr. Weaklend:

Thank you for your letter of July 29, 1992, regarding cathodic protection tests. You asked if a pipeline's cathodic protection is acceptable if a test point on the pipeline meets one of the criteria in Appendix D of 49 CFR Part 192 but fails under another of the criteria. The Part 192 standards relevant to your inquiry are §§ 192.463(a) and 192.465(a). Under § 192.463(a), each cathodic protection system on a pipeline must provide a level of protection that complies with one or more of the Appendix D criteria or its equivalent. Section 192.465(a) requires operators to test each pipeline under cathodic protection to determine if § 192.463(a) is met.

As we apply these standards, an operator is in compliance with § 192.463(a) as long as each point tested under § 192.465(a) meets any one of the Appendix D criteria or its equivalent. No further test data are required if one of the criteria is met. In addition, the operator's corrosion control procedures under § 192.453 should, at a minimum, specify the criterion used for each segment of pipeline.

I apologize for the delay in answering your letter. For a prompt reply to any of your concerns, please call Jim Thomas, Director, Southwest Region, at (713) 750-1746.


Cesar De Leon
Director, Regulatory Programs
Office of Pipeline Safety

Regulation Sections

Section Subject
§ 192.463 External corrosion control: Cathodic protection