Design & Testing # 1998 Gothenburg
Recent years have seen the steadily increasing use of thermoplastics for pipes and fittings for domestic hot and cold water supply and heating installations. Plastic pipe systems, in particular those that incorporate a push-in design offer considerable advantages over conventional pipe systems. However, manufacturers of these products are continually striving for improvement in order to make further inroads into an exkting market that has been traditionally dominated (in the UK at least) by brass and copper fittings. In this respect, the principal concern is the evaluation of an ever increasing range of new materials, designs imd production processes. any one of which may be beneficial in terms of quality, ease of manufacture etc., but most importantly reduced costs. There is increasing awareness that the Dynamic or Cyclic Pressure Test method offers the research and development engineer or product designer a powerful and rigorous comparative tool with which to rapidly access changes made to the product or its manufacturing process. In some instances thu technique offers the only effective way of achieving this onerous requirement in terms of both cost and time. This paper describes through a numher of actual case histories and illustrations where the approach has proved both practical and effective.