焊管2016，Vol.39Issue(3)：55-60,6.DOI:10.19291/j.cnki.1001-3938.2016.03.012
某天然气输送管道对接环焊缝泄漏失效分析
Leakage Failure Reason Analysis of Butt Circumferential Weld for a Natural Gas Pipeline
朱丽霞 1李金凤 1路彩虹 1卫尊义 1陈志昕1
作者信息
- 1. 中国石油集团石油管工程技术研究院, 西安 710077
- 折叠
摘要
Abstract
Aim at the leakage failure of butt circumferential weld of a natural gas pipeline, it systematically analyzed the leakage failure behavior by means of fracture analysis, microstructure, energy spectrum analysis and mechanical properties tests, and the failure mechanism was discussed. The results showed that the residual welding coating in root welding, the welding defects such as pores and slag inclusions during welding process were internal reason for failure, the side slope collapse and ground subsidence along pipeline aggravated the stress concentration at the root welding defect, is the external cause of the circumferential weld leakage failure. Finally the corresponding prevention and control measures were given for this kind of failure.关键词
焊管/环焊缝/焊接缺陷/应力集中/失效分析Key words
welded pipe/circumferential weld/welding defect/stress concentration/failure analysis分类
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朱丽霞,李金凤,路彩虹,卫尊义,陈志昕..某天然气输送管道对接环焊缝泄漏失效分析[J].焊管,2016,39(3):55-60,6.
