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Interpretation Response #PI-71-082 ([Tennessee Public Service Comm] [John Searcy])

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

Interpretation Response Details

Response Publish Date:

Company Name: Tennessee Public Service Comm

Individual Name: John Searcy

Location State: TN Country: US

View the Interpretation Document

Response text:

Mr. John Searcy
Engineering Division
Tennessee Public Service Comm
Cordell Hull Building
Nashville, Tennessee 37219

Dear Mr. Searcy:

This letter id a further reply to your letter of October 5, 1971, in which you posed the question in
paragraph 192.197(c)(2), it is stated that a service regulator and a monitoring regulator are
required. Would you consider two (2) regulators in series both set at the same pressure as being a
service regulator and a monitoring regulator?

In answer to your question the requirements of 49 CFR 192.197(c)(2) will be met with two
regulators in a series, but it will be necessary to have some difference in the setting of the two
regulators to avoid operating difficulties. The sketches that you submitted of the various options
open for the design of a regulatory installation conforms to the intent of §192.197(c).



Joseph C. Caldwell
Acting Director
Office of Pipeline Safety

Regulation Sections

Section Subject
192.197 Control of the pressure of gas delivered from high-pressure distribution systems