# Missouri Public Service Commission — Pipeline Safety Interpretation

- **operation:** document
- **citation:** PI-81-006
- **title:** Missouri Public Service Commission — Pipeline Safety Interpretation
- **source type:** guidance
- **agency:** Pipeline and Hazardous Materials Safety Administration
- **status:** guidance
- **official:** true
- **published on:** 1981-03-17
- **effective on:** Not available
- **summary:** PI-81-006 response to Missouri Public Service Commission concerning 192.197.
- **machine formats:** - **json:** https://regulus.evalyn.ai/document/phmsa-interpretation-pi-81-006.json
- **markdown:** https://regulus.evalyn.ai/document/phmsa-interpretation-pi-81-006.md
- **app url:** https://regulus.evalyn.ai/document/phmsa-interpretation-pi-81-006
- **source url:** https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/Pipeline/1981/PI81006.pdf
**body:**

<<<PAGE 1>>>

March 17, 1981
Mr. Dale W. Johansen
Assistant Director
Gas Department-Engineering Section
Missouri Public Service Commission
P.O. Box 360
Jefferson City, Missouri 65102
Dear Mr. Johansen:
This concerns a phone conversation of January 2, 1981, with Ralph Simmons of this Office
regarding questions in your letter of December 17, 1980. Your questions concerned the
relationship of the equipment described in §192.197(c) with the requirements of §192.739, and
the relationship of the relief devices described in §192.197(c) wit the requirements of §192.743.
Enclosed is an interpretation of the applicability of the particular sections referred to in your
letter.
If I can be of further help in this matter, please let me know.
Sincerely,
Melvin A. Judah
Acting Associate Director for
Pipeline Safety Regulation
Materials Transportation
Bureau
Enclosure
*
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<<<PAGE 2>>>

No. 81-1
Date: March 17, 1981
DEPARTMENT OF TRANSPORTATION
RESEARCH AND SPECIAL PROGRAMS ADMINISTRATION
MATERIALS TRANSPORTATION BUREAU
PIPELINE
_________________________________________________________________
SAFETY REGULATORY INTERPRETATION
_________________________________________________________________
NOTE:A pipeline safety regulatory interpretation applies a particular rule to a particular
set of facts and circumstances, and, as such, may be relied upon only by
those persons to whom the interpretation is specifically addressed.
SECTION: §§192.197(c) or (c)(1), 192.739, and 192.743
SUBJECT: Pressure regulating and relief installation in high pressure distribution systems.
FACTS: None
QUESTION #1: ANSWER: The pressure regulating and relief installations described in §192.197(c)
subject to the requirements of §192.739?
The pressure regulating and relief installations described in §192.197 for
high pressure distribution systems are those for a service line with meter
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<<<PAGE 3>>>

QUESTION #2: ANSWER: and service regulator and series regulator, service regulator or other
protective devices.
The requirements of §197.739 are for regulating stations such as a city gate
measuring and pressure regulating station or a distribution regulator station
installed in a gas distribution main regulating a multiple feed distribution
system.
Since the pressure regulating and relief devices described in §192.197 are
neither a city gate measuring and pressure regulating station nor a
distribution regulating station regulating a multiple feed distribution
system, they are not subject to the inspection and testing requirements of
§197.739.
Are the relief devices described in §192.197(c)(1) and (3) subject to the
requirements of §192.743?
For the same reasons given in the answer to question #1, the relief devices
described in §192.197(c)(1) and (3) would not be subject to the testing
requirements of §192.743.
Melvin A. Judah
Acting Associate Director for
Pipeline Safety Regulation
Materials Transportation
Bureau
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<<<PAGE 4>>>

December 17, 1980
Melvin A. Judah
Acting Associate Director
Pipeline Safety Regulation
Materials Transportation Bureau
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<<<PAGE 5>>>

Department of Transportation
Washington, D. C. 20590
Dear Mr. Judah:
It is requested interpretations be made on the following points of concern in Title 49 CFR, Part
192.
Question #1: Are the pressure regulating and relief installations described in 192.197(c) subject
to the requirements of 192.739?
Question #2: Are the relief devices described in 192.197(c)(1) and (3) subject to the
requirements of 192.743?
Should you have any questions concerning this correspondence, please feel free to contact
Stephen Fischer, Staff Engineer, phone 314/751-3456.
Very truly yours,
Dale W. Johansen, Assistant Director
Gas Department - Engineering Section
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