# Arizona Corporation Commission — Pipeline Safety Interpretation

**Citation:** PI-92-062  
**Type / status:** guidance / guidance  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 1992-11-23

PI-92-062 response to Arizona Corporation Commission concerning 192.463.

## Document text

<<<PAGE 1>>>

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.
Sincerely,
Cesar De Leon
Director, Regulatory Programs
Office of Pipeline Safety
jt
192.463/92-11-03

## Provenance

- Official: Yes
- Source: <https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/Pipeline/1992/PI92062.pdf>
- Source ID: `phmsa`
- SHA-256: `731d9b1939a513ff23911f899f485c21d4f73d41a7fb899c02db8778a0b9b52b`
- Retrieved: 2026-08-20T00:59:31.977Z
- Exported: 2026-08-23T15:10:09.263Z
- Document slug: `phmsa-interpretation-pi-92-062`

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