Reports
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Evaluation of Welding & Jointing of Plastic Pressure Pipes
Price: £100
Ref: 01/WM/02/15
ISBN: 1 84057 240 X
Welding criteria for PE systems have been evaluated by analysis of thermal data to try to reduce heating/cooling cycles and thus speed up jointing where butt fusion is used. A new harmonised set of welding conditions have been evolved which should allow the same conditions to be used for both gas and water pipe installations. Also, the new ‘Fastweld’ process which allows for reduced has been thoroughly investigated and new conditions devised to allow reduced cycle welds to be made with the same physical conditions as standard joints. Welds made in a full range of PE80 and PE100 pipes from 90mm to 400mm diameter have been tested at both 20°C and –5°C. The toughness of welds has been found to be satisfactory for all wall thicknesses up to 30mm. A full assessment of the welding properties of ‘Profuse’ PE pipe with an external PP skin has been made. Jointing of the pipe has been found to be totally satisfactory by both butt fusion and electrofusion welding. With electrofusion fitti
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The Environmental and Social Value of Leakage Reduction
99/WM/08/24 - ISBN: 1 84057 161 6This research develops a methodology for incorporating environmental and social costs and benefits into the evaluation of water management options. Approaches to valuing changes in external costs are developed. In addition, ... More...
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Performance of Electrofusion Joints for PE Pipes
99/WM/02/10 - ISBN: 1 84057 153 5The large number of service failures of electrofusion joints remains of prime concern to UK water industry. This investigation combines the findings of two year's work looking at the effects of site conditions, joint preparat... More...
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A Review of Leakage - Updating Managing Leakage Methodology and Theory
97/WM/08/10 - ISBN: 1 84057 036 9The first update of 'Managing Leakage', the 1995 water industry report. Economics of leakage methodology, both short and long term is developed in detail. There are case studies on whole- life costing. Seven key areas of UKWI... More...
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The Behaviour of Buried Plastic Pipes at Different Depths
01/WM/02/17 - ISBN: 1 84057 2434Monitoring of buried PVCu and thin wall biaxially oriented pipe at operational sites at Chorley and York has shown that loads and deformations of the pipe are predominately generated during installation and that subsequent tr... More...
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Understanding Burst Rate Patterns of Water Pipes
01/WM/02/16 - ISBN: 1 84057 242 6A range of different water companies have supplied UKWIR with their pipe burst data for the last few years and these have been combined into one �national� database. The level of detail in some of the data from smaller co... More...
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