Posters - Additional Information
Plastic Pipes Conference Association # 2001 Munich
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 techniques; the determination of the limits of detection of the NDE system; the determination of critical defect sizes and contamination levels in polyethylene (PE) pipe butt fusion welds; and the design and manufacture of a prototype machine capable of accommodating pipes between 125 mm and 315 mm outside diameter (OD).
Related papers
Author(s) : Mike Troughton, Amir Khamsehnezhad, Changyi Yu
When butt fusion welding polyethylene (PE) pipes in the field, it is often specified that the pipes must undergo fusibility testing in all combinations of suppliers, diameters and thicknesses before being fused in production. This is a very onerous and expensive task, but must be carried out to ensure that the PE...
Author(s) : M. Eckes & Dr. B. Baudrit, Dr. M. Troughton & D. Wylie, H. van Laak & J. Fritz
Unplasticized polyamide 12 (PA-U12) is increasingly being used in pipe applications, especially in the gas sector. However, the material behavior in the usual quality tests for pipe welds has not yet been thoroughly investigated. For this reason, two research institutes, worked in cooperation with a manufacturer of...
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...
Author(s) : Troughton Mike
The current practice for assuring the quality of butt fusion and electrofusion welded joints during installation is by recording the welding parameters used, together with a visual inspection of the welded joint, supplemented by the destructive testing of welds on a sample basis using a short-term test. However,...
Author(s) : Troughton, Brown, Hessel, Piovano
As part of the Polytec Systems European-funded project, electrofusion (EF) joints in polyethylene (PE) pipe, containing different flaws, have been subjected to various standard and non-standard, long-term and short-term, coupon and whole pipe tests. The results were compared to determine which tests could discriminate...
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...
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...
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) : 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...
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