Session: DA-02-02: Design & Analysis of Piping and Components II

Paper Number: 62123

Start Time: Tuesday, July 13, 2021, 05:00 PM

62123 - Influence of Resistor Wire on the Maximum Stress In Electrofusion Joint 

Polyethylene (PE) pipes are widely used in oil and gas transportation, municipal construction. Electrofusion (EF) welding is one of the most commonly used connection method for PE pipes. The welding quality of EF joints is crucial to the safety of PE pipeline. Resistance wire is an important part of pipe fittings structure design, which affects the final welding quality of joints. Hence, in view of the design requirements of various sizes of fittings, we proposed a design method of resistance wires for fittings which focuses on the selection of resistance wire materials and the determination of structural dimensions. In this method, the resistivity and temperature coefficient of resistance (TCR) were used as reference factors for material selection. In addition, the influence of resistance wire structure (e.g. wiring area length, resistance wire diameter, etc.) on the welding quality was also discussed in this method. The validity of this design method was determined by numerical simulation. The results of numerical simulation proved that this method was suitable for pipe fittings of various sizes and has a positive effect in improving joint quality. This design method for resistance wire in EF fittings was deemed to have potential in practice for connection of PE pipes.

Presenting Author: Yurui Hu Zhejiang University

Authors:

Yurui Hu Zhejiang University
Guangte Xiang Zhejiang University
Jianfeng Shi Zhejiang University
Jinyang Zheng Zhejiang University