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U.S. Department of Transportation U.S. Department of Transportation Icon United States Department of Transportation United States Department of Transportation

Interpretation Response #PI-79-018 ([Columbia Gulf Transmission Company] [Kathleen O'Leary])

Below is the interpretation response detail and a list of regulations sections applicable to this response.

Interpretation Response Details

Response Publish Date:

Company Name: Columbia Gulf Transmission Company

Individual Name: Kathleen O'Leary

Location State: TX Country: US

View the Interpretation Document

Response text:

Ms. Kathleen O'Leary

Columbia Gulf Transmission Company

3805 West Alabama Avenue

Houston, Texas 77001

Dear Ms. O'Leary:

I am responding to your letter dated March 12, 1979, to Mr. George Orr, Office of Operations and Enforcement (Pipeline Safety), Houston, Texas, in which you question the applicability of 49 CFR 192.731, 192.739, and 192.743 to relief devices or regulators installed on piping systems or storage vessels not containing gas.

The word "pressure" in Sections 192.731, 192.739, and 192.743 restricts the applicability of those sections to devices or stations which serve to relieve or limit gas pressure. The sections do not apply to devices or regulators which are part of non-gas carrying equipment that may exist inside gas compressor stations. This interpretation is based on the relationship between the words "pressure" and "gas" occurring throughout Part 192 and in particular in the requirements of Section 192.195 for installation of pressure control devices. Since under Section 192.3 the term "pipeline" encompasses all the gas carrying parts of an operator's systems, the pressure relief devices and limiting stations subject to Sections 192.731, 192.739, and 192.743 are those on a "pipeline."

We trust this interpretation is helpful to you.



Cesar DeLeon

Associate Director for

Pipeline Safety Regulation

Materials Transportation Bureau

Regulation Sections

Section Subject
192.731 Compressor stations: Inspection and testing of relief devices
192.739 Pressure limiting and regulating stations: Inspection and testing