1. Classification of Defects in Fusion Joints of Polyethylene Pipes
- Author
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Jinyang Zheng, Weican Guo, Fei Wang, Yongquan Qin, Hui Wang, and Jianfeng Shi
- Subjects
Fusion ,Materials science ,business.industry ,education ,Structural engineering ,Polyethylene ,Fusion joints ,chemistry.chemical_compound ,chemistry ,Classification methods ,Cold welding ,Ultrasonic sensor ,Dislocation ,business - Abstract
To establish a comprehensive classification method of the defects in fusion joints of polyethylene (PE) pipes, the geometrical characters of typical defects in electrofusion (EF) and butt fusion (BF) joints were researched by means of ultrasonic phased array inspection and naked-eye observation. Then the results were comparatively analyzed, and a novel classification method of the defects in PE pipe joints was proposed. Typical defects in EF joints were classified as lack of fusion, voids, wire dislocation, and cold welding. And those in BF joints were classified as crack, voids, inclusion on fusion interface, and process defects. Furthermore, characteristics of the classified defects, together with their main causes were briefly described.Copyright © 2010 by ASME
- Published
- 2010
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