2014 Chicago : A Training and Certification Standard for Fusion Welding of PE Pipes
Author(s) : Edward Ingham, Mike Shepherd
Exova has previously demonstrated that under normal operating conditions PE 100 pipes would be expected to have a lifetime of over 200 years, but in the UK concerns have been reported about relatively high failure rates within the water utilities of fusion joints, particularly for large diameter pipes. For some time,...
2006 Washington DC : Development of a Whole Life Costing Model for Large Diameter Water Mains
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...
2006 Washington DC : Solutions to Installation Difficulties with PE Pipelines
Author(s) : MacKellar, Lowe, Ingham, Ashdown
Polyethylene (PE) is the preferred material for 90% of all water mains laid in the UK.
The pace of renovation of dilapidated cast iron water networks has led to the increasing
demand for coils of flexible PE pipe, driven by the efficiency of using less joints and
taking up considerably less space in the congested...
2006 Washington DC : Ukwir National Mains Failure Database
Author(s) : MacKellar
In 2002 UK Water Industry Research Ltd commissioned Bodycote PDL to collate and maintain a
database of all water main failures in the UK and develop a protocol for data collection of failure
information. Despite the huge disparity in the data formats from each company this has been
achieved and maintenance of the...
2004 Milan : 20+ Years Experience with PE Pipe for Water in the UK
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...
2001 Munich : Butt Fusion Welding of Large Diameter/Thick Wall Pipes
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...
1998 Gothenburg : Jointing Methods for Plastics Pipeline Systems
Author(s) : Headford
Jointing Methods for Plastics Pipeline Systems AL Headford (Durapipe S & LP, UK) ee Introduction The basic requirements for pipe Jointing are common to all pipe systems made from any material (including traditional materials), whether they be for sealed pressure usage or non-pressure usage. These are
1995 Edinburgh : High Integrity PE Stub Flange Connections
Author(s) : Headford
A novel polyethylene stub flange adaptor is described which allows size-for-size connection, in terms
of the respective bores, to iron pipes or fittings. The end load performance of this product is
significantly superior to that achieved with conventional polyethylene flanges, especially at large pipe
1995 Edinburgh : Taking the stress and strain of buried thermoplastic pipe design
Author(s) : Boot, Headford
This paper summarises current design practices for buried thermoplastic pipelines subjected to combined
gravity and internal pressure loadings. It suggests that accurate predictions of stabilised deformations are
neither possible nor necessary, but that appropriate structural design methodologies should instead...
1995 Edinburgh : The Crack Growth Resistance of PVC and PE
Author(s) : Marshall, Ingham, Brogden
When clients purchase plastics pressure pipes, they have frequently made that decision because they know that plastics do not corrode and they assume that if they do not exceed the pressure rating then a long lifetime should be assured. (Low cost has also been known to be a factor).
It is thus of concern for the...
1995 Edinburgh : The Resistance of PE Water Pipeline Systems to Surge Pressure
Author(s) : Beech, Headford, Hunt, Sandilands
The guldeUnes g h n in BS CP 312 :Pwt 2 : 1973 w e recommended to the UK toater
industryfor the deslgn of polyethylene pfpeline systems to toke inin account the
effects of tmnsient [surge) pressurejluctuatlons with respect to fatigue (ref.1). These
guIdelInes we based on earlier experience wlth PVC-Usewer h i n g...
Lifetime of Electrofusion Joints
Author(s) : Lowe, Ingham, Starkey