Reynolds, Jenkins, Burgess, Attwood
# 1998 Gothenburg
The Butt Fusion procedures used in the UK Water and Gas industries, which determine the total time taken to complete a successful joint, have remained largely unchanged since their harmonisation in 1990. The parameters evolved to suit manually operated Butt Fusion machines and reflected the fact that the minimum achievable heater plate removal time, for up to 250mm diameter, was between 6 and 8 seconds, during which the operator had to manually operate a hand pump to remove the heater. With standardisation of Automatic Butt Fusion, and typical heater plate removal times of 2 seconds, potential exists to considerably reduce on-site jointing time, and thus unlock substantial financial savings. produced with short heater-plate removal times. Until recently, the butt fusion welding profiles used throughout the PE pipeline industry have been specified by the appropriate governing body (e.g. British Gas, DVS, UK Water Industry, GPP etc). However, industry, evermore financially aware, is now more receptive to "fitness for purpose" products and projects such as "Fast Weld" are being encouraged. Tests detailed in this paper cover a selection of PE80 pipe sizes and SDR in the range 90mm to 400mm as a continuation of the work detailed in the paper titled "High Productivity Butt Fusion Joining of Polyethylene Pipes" 1995. Cartwright et a1 (5).
Author(s) : Cartwright, Troughton, Hinchcliff, Bowman, Jenkins
For the butt fusion joining of PE80 polyethylene pipes on site, long heat soak and cooling times predominate in the United Kingdom and other countries. The literature is reviewed to propose that these heat soak and cooling times can be significantly reduced via the use of machines with verifiable, reduced short...
Author(s) : Reynolds
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...
Author(s) : Burgess
The use of plastic pipes in water distribution networks, as trunk mains, distribution mains and service pipes is considered. Reference is made to the benefits of using plastics pipes, together with the problems encountered in association with the environmental conditions in which pipes are laid. The hopes and fears...