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Interpretation Response #PI-74-005 ([Alabama Public Service Commission] [Larry E. Waldrop])

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

Interpretation Response Details

Response Publish Date:

Company Name: Alabama Public Service Commission

Individual Name: Larry E. Waldrop

Location State: AL Country: US

View the Interpretation Document

Response text:

Jan 25 1974

Mr. Larry E. Waldrop

Alabama Public Service Commission

P.O. Box 991

Montgomery, AL 36102

Dear Mr. Waldrop:

Your letter to Mr. Frank Fulton dated January 7, 1974, asked if certain service risers made for use
with plastic service piping would meet Office of Pipeline Safety's regulations. You specifically
named items made by Perfection Corporation and Kerotest Manufacturing Corporation, both of
which consist of a metal sheath used as a protective shield over a plastic service riser assembly.
From the information provided it appears that if these risers are installed so that all the below
ground gas containing materials are plastic, no cathodic protection is required. The metallic
sheath is not considered part of a pipeline as that term is defined in Section 192.3 of the Federal
safety standards. However, the installation must still comply with the requirements of Section
192.375, Service lines: plastic, and the limitations of Section 192.123, Design limitations for
plastic pipe, are applicable.

Thank you for your interest. We trust this answers your question satisfactorily.



Joseph C. Caldwell


Office of Pipeline Safety

Regulation Sections

Section Subject
192.123 Design limitations for plastic pipe
192.375 Service lines: Plastic