# Minnesota Department of Public Safety — Pipeline Safety Interpretation

**Citation:** PI-92-032  
**Type / status:** guidance / guidance  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 1992-07-16

PI-92-032 response to Minnesota Department of Public Safety concerning 192.557.

## Document text

<<<PAGE 1>>>

July 16, 1992
Mr. Brian E. Pierzina
Senior Engineer
Office of Pipeline Safety
Minnesota Department of Public Safety
175 Aurora Avenue
St. Paul, MN 55103-2356
Dear Mr. Pierzina:
I am responding to your letter of June 29, 1992, to George W. Tenley, Jr., about the uprating
requirements of Subpart K of 49 CFR Part 192.
Specifically, you asked whether § 192.557(b)(6) applies only when a low pressure distribution
system is uprated to a high pressure distribution system. Because § 192.557(b)(6) requires the
installation of service regulators, the purpose of this regulation is to require proper pressure
controls when a low pressure distribution system is uprated to a high pressure distribution system.
As these regulators would already be in place on high pressure distribution systems, §
192557(b)(6) does not apply to the uprating of a high pressure distribution system.
Sincerely,
/signed/
Cesar De Leon
Director, Regulatory Programs
Office of Pipeline Safety
DB
C:\WP51\INTERPRT\192\557\92-07-16
1

## Provenance

- Official: Yes
- Source: <https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/Pipeline/1992/PI92032.pdf>
- Source ID: `phmsa`
- SHA-256: `0643c5fc09a66ab2759081d150c2a5509d3e46c2b4c2a88d7e1afeb11ffa6968`
- Retrieved: 2026-08-20T00:59:31.977Z
- Exported: 2026-08-22T14:24:44.678Z
- Document slug: `phmsa-interpretation-pi-92-032`

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