Developments in New Materials
Plastic Pipes Conference Association # 2006 Washington DC
McGoldrick, Baeckmann, Walton, Nestelberger
Polyethylene has been in use for the manufacture of piping systems since the sixties and has progressed in its property spectrum not only in terms of resistance to pressure, but also both in terms of resistance to Rapid Crack Propagation and to Slow Crack Growth. In terms of processing friendliness however, further progress has been achieved only in recent years in the form of PE100 materials which exhibit “Low Sag” properties thus allowing the manufacture of very large thickwalled pipes having very constant wall thickness around the whole circumference of the pipe. This paper describes a ground-breaking material technology which facilitates easy manufacture of injection moulded PE100 fittings whilst still fulfilling all the requirements of international standards and outlines also the benefits which this technology can bring to a manufacturer of pipe fittings.
Related papers
Author(s) : S. Nestelberger, J. Cheng
The Point Load Test (PLT) [ 1, 2] was designed to simulate the SCG (slow crack growth) failure initiated by a rock pressing into the exterior wall of a polymer pipe. Today’s PE materials sustain long PLT testing times, due to its high SCG resistance design. Consequently, an accelerated “PLT+” with the support of...
Author(s) : Jane Toogood, Dorothea Wiplinger, Christophe Salles, David Walton
Securing access to safe water and sanitation is recognised as one of the world’s most pressing societal and environmental challenges. Launched in 2007 by Borealis and Borouge,‘Water for the World’ is a programme platform to advance solutions, expertise and know-how to address this challenge. Activities are grouped in...
Author(s) : Shepherd, Headford, Jordan, Reeves, Walton
In Europe polyethylene (PE) has been chosen almost exclusively for gas mains for many years because of economic, technical and safety reasons but in the water industry a number of different materials are still used for pressure water mains. Indeed at sizes above 355mm (14 inch) most new large diameter water mains are...
Author(s) : Catanzano, Bosetti, Walton, Serrao
The development of gas, water and sewerage networks greatly enhanced city life in the late 19th and early 20th Century providing much needed street lighting and dramatically reducing water borne disease. Understandably in many European cities these underground piping systems are now showing serious signs of their...
Author(s) : Alessandro Soresina, David Walton
AEM S.p.A. is the leading Italian company in the management of public utility services, based in Northern Italy (Milan), and operates in the sectors of electricity, gas and heat, telecommunications and other services which include both public and aesthetic lighting.The parent company, AEM S.p.A.have been listed on the...
Author(s) : Walton, van Houten
Electrofusion fittings have now been widely accepted within the European Gas Industry for jointing polyethylene pipe. with a high potential demand for electrofusion couplers, Wavin applied its plastics process knowledge to develop an efficient and cost effective co-extrusion manufacturing technique. In this method a...
Author(s) : Walton, Elzink
One of the main reasons that plastics have not found more extensive use in non pressure sewer schemes has been concern about the long term deformation characteristics of the pipeline. In order to investigate this phenomenon the flexural behaviour of u W C sewer pipes installed in Western European countries, including...
Author(s) : Walton, Al Mehairi, Ebner, Jepson
Author(s) : McGoldrick, Baeckman, Haager
Members of the Association
