天然气与石油2017，Vol.35Issue(5)：12-17,6.DOI:10.3969/j.issn.1006-5539.2017.05.003
高钢级管道环焊缝缺陷修复问题初探
Study on Rehabilitation of High Steel Pipeline Girth Weld Defects
摘要
Abstract
In recent years, many pipelines and transmission station facilities failure accidents show that weld defect is an important factor in pipeline failure. The paper analyzes 8 typical girth weld failure cases and finds that fracture is the main mode of high steel pipeline (X70, X80) failure, and incomplete fusion defects is the main reason for high steel pipeline girth weld failure. At the same time, indicated by the excavation results, there are two kinds of defects of pipeline girth weld, welding defects and appearance defects, mostly superposed. According site investigation, girth weld of transmission station facilities have different material, different wall thickness and complex joint characteristics, the cause of failure is relatively complex. Investigation and analysis of girth weld rehabilitation standards at home and abroad shows that there are no specifically industrial standards for high pipeline rehabilitation at home, and there are contradictions and differences between the existing enterprise standards for girth weld defects rehabilitation. Finally, for pipeline and station facilities girth weld problems, girth weld defects rehabilitation technology, reliability verification test and failure mechanism and failure control measures shall be carried out to provide a theoretical foundation for solving the engineering problems.关键词
高钢级管道/环焊缝缺陷/站场设施/失效分析/修复技术Key words
High steel pipeline/Girth weld defects/Transmission station facilities/Failure analysis/Rehabilitation technology引用本文复制引用
陈安琦,马卫锋,任俊杰,王珂,蔡克,罗金恒,霍春勇,冯耀荣..高钢级管道环焊缝缺陷修复问题初探[J].天然气与石油,2017,35(5):12-17,6.基金项目
国家重点研发计划项目"油气管道及储运设施损伤致灾机理与演化规律研究"(2016 YFC 0802101) （2016 YFC 0802101）
