[1]张 良,罗金恒,任国琪,等.某输气管线环焊缝泄漏失效分析[J].焊管,2016,39(12):65-68.[doi:10.19291/j.cnki.1001-3938.2016.12.015]
 ZHANG Liang,LUO Jinheng,REN Guoqi,et al.Leakage Failure Analysis of Some Gas Transportation Pipeline Circumferential Weld[J].,2016,39(12):65-68.[doi:10.19291/j.cnki.1001-3938.2016.12.015]
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某输气管线环焊缝泄漏失效分析
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《焊管》[ISSN:1001-3938/CN:61-1160/TE]

卷:
39
期数:
2016年第12期
页码:
65-68
栏目:
经验交流
出版日期:
2016-12-28

文章信息/Info

Title:
Leakage Failure Analysis of Some Gas Transportation Pipeline Circumferential Weld
文章编号:
10.19291/j.cnki.1001-3938.2016.12.015
作者:
张 良罗金恒任国琪张 皓
(中国石油集团石油管工程技术研究院, 西安 710077)
Author(s):
ZHANG Liang LUO Jinheng REN Guoqi ZHANG Hao
(CNPC Tubular Goods Research Institute, Xi’an 710077, China)
关键词:
管线环焊缝补焊原始裂纹泄漏
Keywords:
pipeline circumferential weld repair welding original crack leakage
分类号:
TG455
DOI:
10.19291/j.cnki.1001-3938.2016.12.015
文献标志码:
B
摘要:
为了分析某输气管线环焊缝泄漏失效原因,预防类似事件发生,通过磁粉检测、夏比冲击功测试、金相分析和扫描电镜等方法对环焊缝泄漏原因进行了分析。结果表明:环焊缝存在原始裂纹是管线发生泄漏的主要原因,受补焊作业影响,原始裂纹在焊接时已经形成,在附加应力、运行压力及焊接残余应力的共同作用下,焊接裂纹优先在晶粒粗大和高应力处等敏感位置相互连接,最终发生泄漏。建议提高管线焊接质量,并加强无损检测力度。
Abstract:
In order to analyze the leakage failure reason of some gas transportation pipeline circumferential weld and prevent the similar incidents. The leakage failure reasons of circumferential weld were analyzed by magnetic particle testing, Charpy impact test, metallographic examination and scanning electron microscopy. The results showed that the original crack existing in circumferential weld is the main reason. Influenced by repair welding operation, the original crack formed in the welding. Under the combined action of the additional stress, running pressure, and welding residual stress, the welding cracks were interconnected in some sensitive positions, priority in coarse grains and high stress areas, eventually leaked. It is suggested that to improve the quality of pipeline welding, and strengthen the nondestructive testing.

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备注/Memo

备注/Memo:
收稿日期: 2016-08-22
作者简介: 张   良(1986—), 男, 硕士, 工程师, 主要从事油气输送管道安全评价与失效分析工作,发表论文10余篇。
更新日期/Last Update: