Session: MF-03-01 Welding Residual Stress and Distortion Simulation and Measurement

Paper Number: 106279

106279 - Experimental Investigation on Temperature Field Evolution of Pg280 Pipeline in Butt Welding Process 

It is of great significance to investigate the welding temperature field of pipeline around weld joint during welding process for analyzing the thermal stress and evaluating the performance and service life of welded pipelines. In this work, pipeline butt welding experiment of PG280 steel was conducted to figure out the evolution of welding temperature field and parameters that affected welding temperature field. 27 effective measuring points were placed on the external and internal surfaces in 3 directions (3, 6, and 12 o'clock directions on the circumference of the cross section). By using the thermocouple temperature measurement method, the welding temperatures for all 37 cycles of the argonaut welding process were monitored and recorded. The results indicate that the most critical parameter of the temperature field is the distance from the welding position to measuring point. The temperature rose significantly and then dropped as the welding torch passed by a measuring point. The temperature of the measuring point changed more dramatically as it was closer to the weld joint. With the increasing of the number of welding cycles resulting the superposition of weld metal, the magnitude of temperature evolution at the measuring points on the external surface increased progressively, whereas that on the internal surface decreased gradually.

Presenting Author: Maiwen Hu School of Chemical Engineering and Technology, Xi'an Jiaotong University

Presenting Author Biography: Maiwen Hu, born in 2001, a graduated student in Xi'an Jiaotong University, majored in Power Engineering and Engineering Thermophysics.

Authors:

Maiwen Hu School of Chemical Engineering and Technology, Xi'an Jiaotong University
Hao Su China Nuclear Power Engineering Co., LTD.
Yanping Wang China Nuclear Power Engineering Co., LTD.
Zelin Han School of Chemical Engineering and Technology, Xi'an Jiaotong University
Yan Song School of Chemical Engineering and Technology, Xi'an Jiaotong University