With the increasing application of electrofusion (EF) welding in connecting polyethylene (PE) pipes for gas distribution, more effort has been invested to ensure the safety of the pipeline systems. The objective of this paper is to investigate and understand the temperature distribution during EF welding. A one-dimensional transient heat-transfer model was proposed, taking the variation in the rate of power input, the phase transition of PE, and the thermal contact conductance between heating wire and PE into consideration. Then, experiments were designed to verify the power input and the temperature. The measured values of the power input were shown to be in good agreement with the analytical results. Based on ultrasonic test (UT), a new “Eigen-line” method was presented, which overcomes the difficulties found in the thermocouples’ temperature measurements. The results demonstrate good agreements between prediction and experiment. Finally, based on the presented model, a detailed parametric study was carried out to investigate the influences of the variation in the power input, the physical properties of PE, and the thermal contact conductance between heating wire and surrounding PE.
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e-mail: jyzh@zju.edu.cn
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December 2009
Research Papers
A Model for Predicting Temperature of Electrofusion Joints for Polyethylene Pipes
Jianfeng Shi,
Jianfeng Shi
Institute of Chemical Machinery and Process Equipment,
Zhejiang University
, Hangzhou, Zhejiang 310027, P. R. China
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Jinyang Zheng,
Jinyang Zheng
Institute of Chemical Machinery and Process Equipment,
e-mail: jyzh@zju.edu.cn
Zhejiang University
, Hangzhou, Zhejiang 310027, P. R. China
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Weican Guo,
Weican Guo
Institute of Chemical Machinery and Process Equipment,
Zhejiang University
, Hangzhou, Zhejiang 310027, P. R. China; Zhejiang Inspection Center of Special Equipment
, Hangzhou, Zhejiang 310020, P. R. China
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Ping Xu,
Ping Xu
Department of Mechanics,
Zhejiang University
, Hangzhou, Zhejiang 310027, P. R. China
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Yongquan Qin,
Yongquan Qin
Institute of Chemical Machinery and Process Equipment,
Zhejiang University
, Hangzhou, Zhejiang 310027, P. R. China
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Shangzhi Zuo
Shangzhi Zuo
China Inspection Center of Special Equipment
, Beijing, Beijing 100013, P. R. China
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Jianfeng Shi
Institute of Chemical Machinery and Process Equipment,
Zhejiang University
, Hangzhou, Zhejiang 310027, P. R. China
Jinyang Zheng
Institute of Chemical Machinery and Process Equipment,
Zhejiang University
, Hangzhou, Zhejiang 310027, P. R. Chinae-mail: jyzh@zju.edu.cn
Weican Guo
Institute of Chemical Machinery and Process Equipment,
Zhejiang University
, Hangzhou, Zhejiang 310027, P. R. China; Zhejiang Inspection Center of Special Equipment
, Hangzhou, Zhejiang 310020, P. R. China
Ping Xu
Department of Mechanics,
Zhejiang University
, Hangzhou, Zhejiang 310027, P. R. China
Yongquan Qin
Institute of Chemical Machinery and Process Equipment,
Zhejiang University
, Hangzhou, Zhejiang 310027, P. R. China
Shangzhi Zuo
China Inspection Center of Special Equipment
, Beijing, Beijing 100013, P. R. ChinaJ. Pressure Vessel Technol. Dec 2009, 131(6): 061403 (8 pages)
Published Online: October 8, 2009
Article history
Received:
August 31, 2008
Revised:
July 31, 2009
Published:
October 8, 2009
Citation
Shi, J., Zheng, J., Guo, W., Xu, P., Qin, Y., and Zuo, S. (October 8, 2009). "A Model for Predicting Temperature of Electrofusion Joints for Polyethylene Pipes." ASME. J. Pressure Vessel Technol. December 2009; 131(6): 061403. https://doi.org/10.1115/1.4000202
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