Journal of Pressure Vessel Technology

Volume: Page/CID:

A New Computational Method for Probabilistic Elastic-Plastic Fracture Analysis
This paper presents a polynomial dimensional decomposition method for calculating the probability distributions of random crack-driving forces commonly encountered in elastic-plastic fracture analysis...

Modeling and Verification of Creep Strain and Exhaustion in a Welded Steam Mixer
Structures operating in the creep regime will consume their creep life at a greater rate in locations where the stress state is aggravated by triaxiality constraints. Many structures, such as the weld...

J. Pressure Vessel Technol. / Volume 131 / Issue 6 / Research Papers / Materials and Fabrication

A Model for Predicting Temperature of Electrofusion Joints for Polyethylene Pipes

J. Pressure Vessel Technol. -- December 2009 -- Volume 131, Issue 6, 061403 (8 pages)
doi:10.1115/1.4000202

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ABSTRACT

REFERENCES (19)

Author(s):
Jianfeng Shi and Jinyang Zheng
Institute of Chemical Machinery and Process Equipment, Zhejiang University, Hangzhou, Zhejiang 310027, P. R. China

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. China

Withthe increasing application of electrofusion (EF) welding in connecting polyethylene(PE) pipes for gas distribution, more effort has been investedto ensure the safety of the pipeline systems. The objectiveof this paper is to investigate and understand the temperaturedistribution during EF welding. A one-dimensional transient heat-transfer model wasproposed, taking the variation in the rate of power input,the phase transition of PE, and the thermal contact conductancebetween heating wire and PE into consideration. Then, experiments weredesigned to verify the power input and the temperature. Themeasured values of the power input were shown to bein good agreement with the analytical results. Based on ultrasonictest (UT), a new “Eigen-line” method was presented, which overcomesthe difficulties found in the thermocouples' temperature measurements. The resultsdemonstrate good agreements between prediction and experiment. Finally, based onthe presented model, a detailed parametric study was carried outto investigate the influences of the variation in the powerinput, the physical properties of PE, and the thermal contactconductance between heating wire and surrounding PE.