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

Author(s) : Ewing, Greig, Stafford 2006 Washington DC

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,...

Author(s) : Friend, Harget, Hauki 2001 Munich

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...

Author(s) : Harget, Skarelius, Imgram 1992 Eindhoven

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...

Author(s) : Ewing, Greig 1992 Eindhoven

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...

Author(s) : Greig, Ewing 1982 York

Fracture propagation is a phenomenon in which a long brittle crack runs along the pipeline at high speeds of approximately 350 m/s. More stringent operating and test pressures of larger diameter polyethylene gas pipes have had to be introduced...

Author(s) : Ewing 1979 Brigthon

The introduction of metric polyethylene gas distribution systems, metrication of the infra structure and adoption of new techniques collectively implies a short cut to chaos. Progress has been dramatic by any standard and this paper highlights those factors contributory to the implementation of the above programme by...