Evaluation of the Notched Ring Test as a Means of Predicting the Long Term Performance

Author(s) : Christodoulou, Wilson, Hunter, Bowman

Polyethylene (PE) based and metallic pipe systems have been assessed for their ability to stop petrol migrating through the pipe wall, fitting or joint and into water contained within the pipe. A quantitative test was devised that is capable of distinguishing between the different pipe systems. Plain PE pipe...

Author(s) : Headford, Hill, Wilson

The United Kingdom is the most highly developed PE pressure pipe market in the world. Following pioneering work done in the USA and Germany, it was the UK that was first to adopt PE on a large scale for gas, and then for water distribution. The 100% PE policy of British Gas, and wide range of sizes used (at low...

Author(s) : Hill, Wilson, Headford

Butt fusion welding is the most reliable and unobtrusive method of joining PE pipes (and spigot fittings) of virtually any size-except perhaps the smallest where other methods are usually preferred. It is the dominant method of jointing both medium and large pipe sizes, but for different reasons. In medium pipe sizes...

Author(s) : Wilson

The &ect of pipe wall thickness and welding parameters on the joint quality of bun fusion welded PElOO water pipes has been investigated using notched Charpy impact testing and tensile testing. The conventional U.K. Water Industry weld tensile test does not give a geometry independent measurement of weld ductility but...

Author(s) : Tooth, Banks, Wilson

An outline is given of the main processes employed for the manufacture of multilayered GRP pipes intended for the conveyancing of both water and contaminated fluids, where high strength and light weight lead to cost and/or transportation benefits. The analysis presented, which is based on Sanders’ thin shell theory...