[1]刘景新,赵 斌,刘红星,等.埋地天然气管道断裂故障诊断分析[J].焊管,2013,36(9):58-61.[doi:1001-3938(2013)09-0058-04]
 LIU Jingxin,ZHAO Bin,LIU Hongxing,et al.Buried Gas Pipeline Fracture Fault Diagnostic Analysis[J].,2013,36(9):58-61.[doi:1001-3938(2013)09-0058-04]
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埋地天然气管道断裂故障诊断分析
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《焊管》[ISSN:1001-3938/CN:61-1160/TE]

卷:
36
期数:
2013年第9期
页码:
58-61
栏目:
经验交流
出版日期:
2013-09-28

文章信息/Info

Title:
Buried Gas Pipeline Fracture Fault Diagnostic Analysis
文章编号:
1001-3938(2013)09-0058-04
作者:
刘景新1赵 斌2刘红星1魏明业1吴 婷1么 强2
(1. 唐山市特种设备监督检验所,河北 唐山 063000;
2. 河北联合大学,河北 唐山 063009)
Author(s):
LIU Jingxin1ZHAO Bin2 LIU Hongxing1WEI Mingye1WU Ting1YAO Qiang2
(1. Tangshan Special Equipment Supervising and Inspection Institute, Tangshan 063000, Hebei, China;
2. Hebei United University, Tangshan 063009, Hebei, China)
关键词:
管道焊缝未焊透裂纹断口微观分析有限元
Keywords:
pipeline weld incomplete penetration cracking fracture micro analysis finite element
分类号:
TG115.28
DOI:
1001-3938(2013)09-0058-04
文献标志码:
B
摘要:
埋地天然气管道在使用过程中环焊缝处由于各种原因容易产生裂纹,导致管道失效。对某天然气管道的开裂段取样,进行宏观形貌检查、微观断口分析及化学成分检测。结果表明,断裂管段材料中Cr含量较标准要求值偏低,且开裂位置存在未焊透缺陷是天然气管道开裂的主要原因。有限元分析结果表明,管道材料在应力载荷及腐蚀的共同作用下,管道环焊缝未焊透处将产生裂纹,该裂纹会随时间增加而不断扩展,最终导致管道失效。建议在管道的实际运行过程中,要加强监测并做好预警措施,避免因泄漏导致事故的发生。
Abstract:
During the application, some cracks easily appear in the circumferential weld of the buried gas pipeline due to various reasons, and it even leads to pipeline failure. Taking samples from some gas pipeline cracking section, macroscopic examination, micro fracture analysis, and chemical composition inspection were carried out. The results showed that the content of Cr in pipe materials is less than the specified value, and some incomplete penetration defects exist in cracking location, it is the main reason caused gas pipeline cracking. The finite element analysis results indicated that under the stress load and corrosion, the cracks will appear in incomplete penetration location of pipeline circumferential weld, which will extend with time going on, and finally lead to pipeline failure. In the actual operation process of pipeline, it should strengthen monitoring and early precaution measures, and avoid accidents caused by pipeline leakage.

参考文献/References:

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备注/Memo

备注/Memo:
基金项目:河北省质量技术监督局项目(编号:2011ZD17)。
刘景新(1968—),硕士,教授级高工,主要从事锅炉、压力容器和压力管道的安全检验研究工作。
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