Related papers
2016 Berlin : Asset management of polyethylene gas networksAuthor(s) : Ian Aldridge, Declan Robinson, Dave Smart, Chris Reed, Martyn, Greig, Trevor Stafford, David Christie-Lowe, Alec Erskine
For the UK polyethylene (PE) gas pipe network, the first installations now exceed 40 years in the ground, with an original design life of 50 years. It was thus timely to review the current condition and performance history of these first generation PE materials. A major 4 year project was started in 2010 to examine...
1995 Edinburgh : PE-X - The Versatile High Performance Pressure Pipe SystemAuthor(s) : Hoving, Palmlof, Harget, Upperton, Ewing
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)...
1995 Edinburgh : Rapid Crack Propagation in PE Gas PipesAuthor(s) : Greig
One of the main design criteria for limiting the operational pressures of polyethylene (PE) gas pipes is its resistance to rapid crack propagation (RCP). Below a critical pressure the crack arrests but above the whole pipeline may be fractured. The paper discusses the critical pressures measured during European and...
1992 Eindhoven : High Strength Oriented HDPE PipesAuthor(s) : Ward, Atkinson, Greig, Hansard
A novel die-drawing process has been developed at Leeds
University. By incorporating a mandrel, pipes may be expanded
hoopwise whilst being drawn axially. Such biaxially-oriented
pipes have properties better suited to the transmission of gases
and liquids than either isotropic or longitudinally-drawn pipes.
In this...
1985 York : Fracture Arrest Conditions in Polyethylene (PE) Gas PipesAuthor(s) : Greig
As polyethylene pipes increase in size above 250 mm, the
avoidance of high-speed brittle fracture propagation becomes
of overriding importance. More stringent operating and test
pressures have had to be introduced. A full scale test
programme on a variety of pipe sizes is being conducted by
British Gas. In this paper,...