Pipeline Safety Interpretation PI-83-0105

Page 1PI-83-0105 June 23, 1983 Mr. Edward L. Schmitt Design Engineer Kerotest Manufacturing Corporation 2525 Liberty Avenue Pittsburgh, PA 15222 Dear Mr. Schmitt: Your letter of June 9, 1983, requests an interpretation of 49 CFR 192.281(a) relative to the statement, "Plastic pipe may not be joined by a threaded joint." A copy of a previous interpretation that addresses your question is enclosed. Sincerely, Original signed by: Richard L Beam Associate Director for Pipeline Safety Regulation Materials Transportation Bureau#

Page 2September 25, 1979 Mr. P. P. Petro Director Technical Services 3240 North Mannheim Road Franklin Park, Mob 60131 Dear Mr. Petro: This responds to your letter of July 6, 1979, asking if the rule in 49 CFR 192.281(a), stating that "plastic pipe may not be Joined by a threaded joint or miter Joint," applies to the manufacture of fittings in a plant. As indicated by Section 192.271(b), neither section 192.281 nor any of the other provisions of Subpart F concerning the joining of materials apply to Joining that is performed during the manufacture of pipe or components (including fittings). The regulations do apply to any Joining of pipe or components that occurs for gas pipeline transportation purposes outside the manufacturing factory. Such joining is normally performed at a pipeline construction site or in fabrication shops. Sincerely, SIGNED Cat& De Leon Associate Director for Pipeline Safety Regulation Materials Transportation Bureau#

Page 3Kerotest manufacturing Corp 2525 Liberty Avenue Pittsburgh, PA 15222 June 9, 1983 U. S. Department of Transportation Research and Special Programs Administration 100 Seventh Street - S.W. Washington, D.C. 20590 Gentlemen: We are requesting an interpretation on Paragraph 192.281(a) in the Code of Federal Regulations. This paragraph states in part, "Plastic pipe may not be joined by a threaded joint." Does the scope of this requirement include threaded joints integral to the design of plastic valves and fittings or is its jurisdiction limited to restricting the use of threaded joints between plastic pipe and other components? The answer to the above question will have an immediate impact on our line of thought for future products. It is requested that you expedite your answer and forward them to us as soon as possible. Thanking you in advance for your time and effort. Sincerely yours, Edward L. Schmitt Design Engineer Kerotest Manufacturing Corp.#