The testing and repair of polyethylene natural gas distribution pipe Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/7w62fc330

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  • With the dominance of polyethylene as the building material for America's natural gas distribution system and a growing demand for natural gas, there exists and ever increasing need for improved methods of repairing damaged natural gas distribution pipe. This paper serves as the ground work for a multi-part study seeking to address this need by working towards the development of a polyethylene pipe repair patch that can easily be applied to damaged sections of pipe with minimal labor. The first part of the study addresses the stresses present in a section of natural gas pipe and the criteria demanded of a successful patch adhesive. Tensile testing techniques are used to evaluate potential adhesives and finite element modeling is used to determine the maximum expected stresses experienced by the patch on a section of polyethylene pipe. The second part of the study addresses the need for the section of pipe to maintain its structural integrity after the application of the patch and goes into the testing required to validate polyethylene gas pipe that has been damaged and repaired using the polyethylene pipe repair patch.
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