# West Virginia Public Service Commission — Pipeline Safety Interpretation

**Citation:** PI-93-035  
**Type / status:** guidance / guidance  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 1993-07-15

PI-93-035 response to West Virginia Public Service Commission concerning 192.457.

## Document text

<<<PAGE 1>>>

July 15, 1993
Mr. Darrell A. McKown
Manager, Gas Pipeline Safety Transportation Division
West Virginia Public Service Commission
P. O. Box 812
201 Brooks Street
Charleston, WV 25323
Dear Mr. McKown:
Thank you for your letter of May 10, 1993, requesting an interpretation of the gas pipeline
standards in 49 CFR part 192. You asked whether the logic of §192.457(b) applies to
corrosion under §§192.479(b), 192.481, and 192.483.
Section 192.457(b) applies to certain buried or submerged pipelines installed before
August 1, 1971. The standard requires operators to cathodically protect areas of
continuing corrosion that unless controlled could become detrimental to public safety.
Under this standard, protecting against corrosion is discretionary, depending on the
circumstances relevant to public safety.
In contrast, §§192.479(b), 192.481, and 192.483 do not allow operators to exercise
discretion in applying protection against corrosion. Operators must apply the prescribed
protective measures to all corrosion covered by these standards.
Sincerely,
Cesar De Leon
Director, Regulatory Programs
Office of Pipeline Safety
dal\192.457\93-07-15

## Provenance

- Official: Yes
- Source: <https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/Pipeline/1993/PI93035.pdf>
- Source ID: `phmsa`
- SHA-256: `77582d5d07b16cc0abbac70595dd46c244f6257865c53c55cd3ef8232885ead0`
- Retrieved: 2026-08-20T00:59:31.977Z
- Exported: 2026-08-22T21:59:48.741Z
- Document slug: `phmsa-interpretation-pi-93-035`

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