Interpretation Response #PI-75-012
Below is the interpretation response detail and a list of regulations sections applicable to this response.
Interpretation Response Details
Mr. Paul L. Hathaway
Vice President - Gas
San Diego Gas &; Electric Company
P. O. Box 1831
San Diego, Ca 92112
Dear Mr. Hathaway:
Referring to your letter of February 21, 1975, and figures attached thereto, the redesigned riser shown in Figure 2 with a protective sleeve covering all plastic materials aboveground appears to meet the requirements of 49 CFR 192.375(a) for protection of plastic service lines. Although we do not have enough information to opine whether the riser shown in Figure 2 would meet all the requirements of 49 CFR 192.123, we have particular misgivings about its meeting the temperature limitations of section 192.123(b) under ordinary aboveground operating conditions.
The two 4-inch PVC lines which are shown in Figure 3 are mains. This is so because in accordance with the definition of the term "main" in 49 CFR 192.3 each 4-inch line serves as a common source of supply for more than one service line.
We trust this adequately responds to your inquiry.
Sincerely,
Joseph C. Caldwell
Director
Office of Pipeline Safety
Regulation Sections
| Section | Subject |
|---|---|
| § 192.375 | Service lines: Plastic |