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...
2016 Berlin : Residual quality of excavated UPVC gas and water distribution pipelines
Author(s) : Frans Scholten, Ernst van der Stok, Britta Gerets, Mirko Wenzel, Mike Boege
The current condition of 35-50 years old uPVC main (110 mm) and service (32 mm) pipes for gas and water distribution was assessed. From 27 excavation sites in total about 400 segments of 1.2 meters length each were tested using many techniques. The K-value (average molecular weight) of the PVC, the degree of gelation...
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,...
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 : High productivity butt fusion jointing of PE pipes
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...
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...