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PE-X - The Versatile High Performance Pressure Pipe System [PEX]

Hoving, Palmlof, Harget, Upperton, Ewing

# 1995 Edinburgh

The performance properties of Cross Linked Polyethylene (PE-X) are reviewed with particular emphasis on extreme temperature operation. Resistance to rapid crack propagation at low temperatures and retention of properties at elevated temperatures are highlighted. The potential availability of a high strength (MRS 12.5) PE-X pipe is also considered. Versatility in pipe jointing is explored together with the practical application of PE-X pipe systems. The development of international standards for PE-X pressure pipe systems is also featured including the status of an IS0 specification for PE-X gas distribution pipework.

Please note that the whole article content is available on PPCA website only

Author(s) : Ewing, Greig, Stafford

Funded by a UK government “Smart” Award, the authors have researched, and partially developed, a novel concept for temporarily reducing the external diameter of a PE pipe and then allowing recovery to full diameter as a close fit within a host main. The novelty lies in the four-lobed collapsed pipe geometry, which...

2001 Munich : High Performance Fusion Jointing of PE-X Pipes

Author(s) : Friend, Harget, Hauki

Fusion jointing of cross-linked polyethylene (PE-X) pipe systems can be achieved by the use of conventional electrofusion (EF) couplers. The body of these couplers are manufactured from thermoplastic polyethylene, hence the performance of the joint is limited by the response of the body of the EF coupler. We report on...

1992 Eindhoven : Crosslinked PE - Extruding the Limits of Pressure Pipe Performance

Author(s) : Harget, Skarelius, Imgram

Processes for the production of Crosslinked Polyethylene Pipe are discussed, with particular emphasis on peroxide crosslinking. Performance characteristics are presented in relation to key requirements of pressure pipe systems. Electrofusion is shown to provide an effective solution to pipe jointing, resulting in...

1992 Eindhoven : Development and Application of PE Gas Pipe Systems for Use at Pressures Beyond 7 bar

Author(s) : Ewing, Greig

Operation of high density polyethylene (HDPE) pipes at 7 bar has been very successful in British Gas over the last few years. Using HDPE pipes at higher pressures requires a high level and correct balance of pipe properties of strength, stress crack and rapid crack propagation resistance. Raised levels of jointing...

1982 York : Fracture Propagation in Polyethylene (PE) Gas Pipes

Author(s) : Greig, Ewing

Fracture propagation is a phenomenon in which a long brittle crack runs along the pipeline at high speeds of...