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Interpretation Response #PI-19-0006

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

Interpretation Response Details

Response Publish Date:

Company Name: Enstar Natural Gas Company

Individual Name: Mr. Steve Cooper

Location State: AK Country: US

View the Interpretation Document

Response text:

Mr. Steve Cooper
Director of Operations
Enstar Natural Gas Company
3000 Spenard Road
P.O. Box 190288
Anchorage, AK 99519-0288

Dear Mr. Cooper:

In a June 18, 2019, letter to the Pipeline and Hazardous Materials Safety Administration (PHMSA), you asked for reconsideration of PHMSA's March 11, 2019, response to your request for interpretation on external corrosion control under § 192.467.

You based your request for reconsideration on the remoteness of the casing/pipeline location, low operating pressure (MAOP of 60 psig), leak survey frequency, and class location of the 8-inch pipeline diameter, 0.277-inch wall thickness distribution pipeline located in a Class 1 location.

PHMSA provides written clarifications based on current Federal pipeline safety regulations. As to the referenced interpretation (PI-86-004), please refer to PHMSA's March 11, 2019, response letter. After examining your latest information, PHMSA does not believe remoteness of a pipeline location and the quarterly leak survey frequency are justification for not complying with the pipeline safety regulations. PHMSA still believes the March 11, 2019, interpretation response letter correctly reflects the current pipeline safety regulations. Therefore, Enstar must perform inspections, tests, and remediation with procedures that are in accordance with § 192.467.

If we can be of further assistance, please contact Tewabe Asebe at 202-366-5523.


John A. Gale
Director, Office of Standards
and Rulemaking

Regulation Sections

Section Subject
192.467 External corrosion control: Electrical isolation