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Interpretation Response #PI-82-0107

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

Interpretation Response Details

Response Publish Date:

Company Name:

Individual Name:

Location State: MO Country: US

View the Interpretation Document

Response text:


July 28, 1982

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:

We apologize for the lateness of our response to your letter of April 14, 1981, asking whether §192.357(d) requires nonrelief type service regulators, which would release gas only upon failure to have their breather vents vented to the outside atmosphere.

As indicated by the enclosed interpretations (dated October 12, 1973, and November 1, 1976), §192.357(d) does not apply to non-relief type service regulators because they do not release gas during operation. Nevertheless, nonrelief type service regulators that have breather vents are subject to the requirements of §192.355(b)(2) and must he installed so that gas escaping from the vents in the event of diaphragm or other failure is released into the outside atmosphere.
We trust that this response will satisfy your concerns.

Melvin A. Judah
Acting Associate Director for
Pipeline Safety Regulation
Materials Transportation Bureau

Regulation Sections

Section Subject
192.199 Requirements for design of pressure relief and limiting devices