2016 Berlin : Development of flaw acceptance criteria for welded joints in PE pipes
Author(s) : Mike Troughton, Amir Khamsehnezhad
the inspection of butt fusion and electrofusion joints in polyethylene (PE) pipes. Depending on the technique and inspection procedure, various types of flaw, including discrete planar lack of fusion, particulate contamination, voids, cold fusions and pipe under-penetration can be detected. However, the usefulness of...
2006 Washington DC : An Effective Barrier Pipe System for Contaminated Land
Author(s) : Christodoulou, Wilson, Hunter, Bowman
Polyethylene (PE) based and metallic pipe systems have been assessed for
their ability to stop petrol migrating through the pipe wall, fitting or joint and
into water contained within the pipe. A quantitative test was devised that is
capable of distinguishing between the different pipe systems. Plain PE pipe...
2006 Washington DC : Second Generation Skinned Pipes with Enhanced Fracture Resistance
Author(s) : Wood, Richards, Street, Muckle, Bowman
For the movement of fuel gas and water, plastics pipes are dominant in many
markets, and this success has been based on single material solid wall pipes.
There are now an expanding number of multi-layered plastics pipes, and
described here for the first time is the performance of the second-generation
of skinned pipe...
2001 Munich : Optimising the Performance of Ferrule Straps with PVC Pipes
Author(s) : Stokes, Potter, Metcalfe, Bowman, Graham
The response of three different forms of polyvinyl chloride (PVC) pipe has been explored
when the pipes had attached to them ferrule straps. Pipes were subjected to fluctuating
internal pressure (fatigue) loading at 20°C, and the lifetimes, location of any failures and
the types of failures recorded. Tests were made...
2001 Munich : Welding with Integrated Non-Destructive Examination of PE Pipes
Author(s) : Troughton
This paper describes the development of an ultrasonic non-destructive examination (NDE)
system that is incorporated into an automatic butt fusion welding machine and performs an
examination of the joint within the cooling time of the welding cycle. The programme of
work included the optimisation of the ultrasonic NDE...
1998 Gothenburg : Comparison of Short-Term Coupon Test
Author(s) : Hinchcliff, Troughton
There are a number of different mechanical test methods available to assess the quality of butt
fusion welded joints in polyethylene (PE) pipes. However, little published information exists
on the correlations that may or may not exist between the results from these methods.
This paper compares the results from five...
1998 Gothenburg : Linear Vibration Welding of PE Pipes - 1998
Author(s) : Nomura, Hirabayashi, Troughton
This paper describes an assessment of the quality of butt and branch joints in polyethylene (PE) pipes, produced using the linear vibration welding technique. Results showed that butt welds in pipes of 165 mm outside diameter(0D) could be produced within a total weld/cool time of 85 seconds, which is less than 15?'0...
1995 Edinburgh : Enhancing the performance of Plastics Pipes, Fittings & Joints
Author(s) : Bowman
The many technologies associated with the production, installation and uses of
plastics pipes systems increase in their sophistication and diversity This paper
selects and reviews changes that have and are taking place with polyvinyl
chloride (PVC) and polyethylene (PE) pressure pipe systems designed for
1995 Edinburgh : Linear vibration welding of PE pipes - 1995
Author(s) : Troughton
This paper describes an initial programme of work to examine the feasibility of joining polyethylene pipe using the linear vibration welding technique. Commercial linear vibration welding equipment was used to join small lengths (100mm) of 125mm SDR11 PE80 and 180mm SDR17.6 PElOO pipe. Welds were achieved in total...
1992 Eindhoven : Procedures of Quantifying the Strength of Electrofusion Joints
Author(s) : Bowman,Medhurst, Portas
For two sample shapes different procedures have been examined as methods to quickly and quantitatively assess the strength of electrofusion joints. It is shown that the peel test, specified in BS7336, can be added to in order to obtain a quantitative measure of joint strength either using the % ductility on the...
1988 Bath : The Fatigue Behaviour of Medium Density Polyethylene Pipe Systems
Author(s) : Bowman
Elevated teqerature fatigue of MDPE pipe system showed socket and electrofusion fittings had similar fatigue lifetimes, while butt jointed pipes failed at repmducibly lower lifetimes. Extrapolatims to 2O'C preserved the raking in joint performance, although combined creep ad fatigre tests showed pure fatigue...
1985 York : The Failure of Butt Fusion Joints in Polyethylene Pipe Systems
Author(s) : Parmar, Bowman
The performance of aligned and controlled misaligned butt welds in 63 and 90mm polyethylene pipe systems was determined under fatigue loading conditions designed to induce brittle failure. The results showed a significant reduction in fatigue lifetime for butt welds having fractional misalignments greater than 10% of...