# North Carolina Utilities Commission — Pipeline Safety Interpretation

**Citation:** PI-76-072  
**Type / status:** guidance / guidance  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 1976-11-24

PI-76-072 response to North Carolina Utilities Commission concerning 192.621.

## Document text

<<<PAGE 1>>>

November 24, 1976
Mr. R. J. Nery, Chief
Natural Gas Section
North Carolina Utilities
Commission
Raleigh, North Carolina 27602
Dear Mr. Nery:
This refers to your letter of October 14, 1976, in which you ask whether Section 192.619 or
Section 192.621 governs the maximum allowable operating pressure of a distribution pipeline,
regarding establishing relief valve settings under Section 192.201.
For a high-pressure distribution pipeline, the maximum allowable operating pressure is governed
by Section 192.619, subject to the applicable limitation of Section 192.621. Under these
requirements, as you interpret correctly, a person may not operate a pipeline at a pressure
permitted by Section 192.619(c) if that pressure would exceed the applicable limitation of Section
192.621.
If we may be of further assistance, please contact us.
Sincerely,
Cesar DeLeon
Acting Director
Office of Pipeline
Safety Operations
dal\192\621\76-11-24

## Provenance

- Official: Yes
- Source: <https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/Pipeline/1976/PI76072.pdf>
- Source ID: `phmsa`
- SHA-256: `f01e734ed81c47363f65a96c0e126aaf7833149418b72a8c407a59cd8a90d262`
- Retrieved: 2026-08-20T00:59:31.977Z
- Exported: 2026-08-21T23:37:32.587Z
- Document slug: `phmsa-interpretation-pi-76-072`

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```