焊管2024，Vol.47Issue(12)：27-32,6.DOI:10.19291/j.cnki.1001-3938.2024.12.004
长输管道不等壁厚焊接坡口优化研究
Study on Optimization of Welding Groove of Long Distance Pipeline with Unequal Wall Thickness
摘要
Abstract
In order to avoid the failure and fracture of the pipeline in the weld,the groove type of the unequal wall thickness welding of the long distance pipeline was optimized.The stress of the traditional groove and the internal boring groove was calculated by finite element software,and the influence of the two key parameters of the internal boring cutting length and angle on the stress of the weld was analyzed.The results show that the internal boring groove type is more favorable to the stress of the weld.Because the internal cutting root stress is minimum when the internal boring Angle is 10°,when the internal boring angle is more than 15°,the internal cutting root stress will be significantly increased,but the effect on the reduction of the root welding position stress is small,so the internal boring Angle is recommended to be 10°～15°.When the internal trimming length is 40～60 mm,the stress at the root of the internal trimming and the stress at the root welding position is relatively balanced and the value is low,which can meet the requirements of the field and non-destructive testing at the same time,so it is recommended that the cutting length in the hot bending pipe is 45～60 mm.关键词
长输管道/不等壁厚焊接坡口/内镗孔坡口/内镗孔内削边长度/内镗孔角度Key words
long distance pipeline/unequal wall thickness welding groove/internal boring groove/the length of the internal boring hole/internal boring angle分类
矿业与冶金引用本文复制引用
高晋..长输管道不等壁厚焊接坡口优化研究[J].焊管,2024,47(12):27-32,6.基金项目
中国石油化工股份有限公司资助项目"输送煤制气用X80钢管材及焊接接头安全评定研究"(项目编号319008-7). （项目编号319008-7）
