Interpretation Response #PI-83-006 ([CIBA - GEIGY Pipe Systems] [Philip K. Gilbert])
Below is the interpretation response detail and a list of regulations sections applicable to this response.
Interpretation Response Details
Response Publish Date:
Company Name: CIBA - GEIGY Pipe Systems
Individual Name: Philip K. Gilbert
Location State: TX Country: US
View the Interpretation Document
Response text:
Mr. Philip K. Gilbert
CIBA - GEIGY Pipe Systems
Suite 190
7676 Hillmont
Houston, TX 77040
Dear Mr. Gilbert:
A formal interpretation of 49 CFR §192.281, Plastic pipe, paragraph (a) as requested by your letter of March 23, 1983, is enclosed.
Sincerely,
Richard L. Beam
Associate Director for
Pipeline Safety Regulation
Materials Transportation Bureau
Enclosure
DEPARTMENT OF TRANSPORTATION
RESEARCH AND SPECIAL PROGRAMS ADMINISTRATION
MATERIALS TRANSPORTATION BUREAU
PIPELINES SAFETY REGULATORY INTERPRETATION
Note: This pipeline safety regulatory interpretation applies a particular rule to a particular set of facts and circumstances, and as such, is binding only on the operator to whom the interpretation is specifically addresses.
SECTION: 192.281
SUBJECT: Joining plastic pipe with a plastic mechanical fitting that is threaded to provide gasket pressure.
FACTS: None.
QUESTION: Would DOT consider the CIBA-GEIGY Pronto-Lock, Pronto-Lock II, and Pronto-Lock III mechanical coupling systems as threaded joints or as mechanical joints?
INTERPRETATION: The Pronto-Lock, Pronto-Lock II, and Pronto-Lock III mechanical coupling systems are "mechanical joints" and would not be considered as "threaded joints" which are prohibited under §192.281(a).
The threaded portions of these joints are used to apply compressive stress to a gasket or O-ring seal similar to many other joint systems now used in gas piping systems. Threads are designed to minimize stresses and are not used as a gas seal.
Richard L. Beam
Associate Director for
Pipeline Safety Regulation
Materials Transportation Bureau
Regulation Sections
| Section | Subject |
|---|---|
| 192.281 | Plastic pipe |