高钢级管道环焊缝缺陷修复技术探讨  

Discussion on repair technology of girth weld defects of high-grade steel pipelines

作　　者：李荣光[1] 张巍[1] 赵振 于憬 汤斌 孙旭 邸曼丽 王亚军 LI Rongguang;ZHANG Wei;ZHAO Zhen;YU Jing;TANG Bin;SUN Xu;DI Manli;WANG Yajun(PetroChina Pipeline Company;China Petroleum Pipeline Material and Equipment Corporation;Cezi Island Oil Depot of Ningbo Oil Transportation Department,SINOPEC Pipeline Storage&Transportation Company Limited)

机构地区：[1]中国石油管道公司 [2]中油管道物资装备有限公司 [3]中国石化管道储运有限公司宁波输油处册子岛油库

出　　处：《油气储运》2020年第3期307-312,360,共7页Oil & Gas Storage and Transportation

基　　金：国家重点研发计划资助项目“油气长输管道及储运设施检验评价与安全保障技术”,2016YFC0802100。

摘　　要：近年来因环焊缝开裂引起的高钢级管道失效事故频发,因此,高钢级管道环焊缝质量及缺陷修复问题备受关注。基于高钢级管道环焊缝缺陷类型,介绍了国内外高钢级管道修复标准对于环焊缝缺陷的推荐处理方法,系统梳理了现有焊接与非焊接修复技术的阶段性研究成果。在焊接修复技术方面,B型套筒是修复高钢级管道环焊缝缺陷的首选修复技术,目前针对开式三通、护板及B型套筒的水平直焊缝及环向角焊缝的全自动焊接技术已基本具备推广应用条件,将大幅提高焊接效率及焊接质量。非焊接修复技术主要有复合材料、环氧套筒及钢制内衬复合材料修复技术3类,国外针对复合材料与钢制内衬复合材料修复X42级管道环焊缝缺陷(50%未熔合)开展了系列验证试验,相比复合材料,钢制内衬复合材料修复效果更好;国内则针对经检测评价确定无需修复但存在缺陷的环焊缝采用钢质环氧套筒进行补强,并结合复合材料及环氧套筒修复技术,开发了复合钢制内衬修复技术。最后,针对高钢级管道环焊缝缺陷修复问题提出了解决思路及重点研究方向,以期为中俄东线天然气管道及类似高钢级管道环焊缝缺陷修复提供技术参考。(图2,表8,参22)In recent years,as for the frequent occurrence of failure accidents of high-grade steel pipelines caused by girth weld cracking,great attention has been drawn to the quality of girth weld and defect repair of high-grade steel pipelines.In terms of the types of girth weld defects of high-grade steel pipelines,the recommended treatment methods for girth weld defects in domestic and foreign repair standards for high-grade steel pipes were introduced,and the research results of the existing welding and non-welding repair technologies were systematically combed.As for welding repair technology,Type B sleeve is the preferred repair technology for repairing high-grade steel pipe girth weld defects.At present,the fullautomatic welding technology for horizontal straight welds and circumferential fillet welds for open tee,guard plate and Type B sleeve has basically met the conditions for popularization and application,and is expected to greatly improve the welding efficiency and welding quality.Non-welding repair technology divides into three types:composite material,epoxy sleeve and steel lining composite material repair technology.A series of verification tests were conducted abroad to repair the defects(50%incomplete fusion)of X42 pipeline girth welds with composite materials and steel lining composite materials.Compared with composite materials,steel-lined composite materials perform better in axial tensile load test.In China,steel epoxy sleeve was used to reinforce the girth weld,which was inspected and evaluated to be unnecessary to repair but has defects,and the composite steel lining repair technology was designed based on the composite material and epoxy sleeve repair technology.Finally,the solution and key research directions were put forward to solve the problem of girth weld defect repair of high-grade pipelines,and supposed to provide technical reserves for the safe operation of China–Russia Eastern Gas Pipeline Project and similar high-grade pipelines.

关 键 词：油气管道 高钢级 环焊缝缺陷 缺陷修复 

分 类 号：TE88[石油与天然气工程—油气储运工程]