中国电力 ›› 2017, Vol. 50 ›› Issue (9): 155-160.DOI: 10.11930/j.issn.1004-9649.201612024

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某电厂主蒸汽管道爆管原因分析

孙中元, 仇云林   

  1. 苏州热工研究院有限公司,江苏 苏州 215004
  • 收稿日期:2016-12-07 出版日期:2017-09-25 发布日期:2017-09-11
  • 作者简介:孙中元(1985—),男,湖北黄冈人,硕士,工程师,从事管道应力分析、振动测试、支吊架调整工作。E-mail: sunzhongyuan@cgnpc.com.cn

Cause Analysis of Main Steam Piping Explosion in a Coal-Fired Power Plant

SUN Zhongyuan, QIU Yunlin   

  1. Suzhou Nuclear Power Research Institute Co., Ltd., Suzhou 215004, China
  • Received:2016-12-07 Online:2017-09-25 Published:2017-09-11

摘要: 针对某燃煤电厂主蒸汽管道发生的爆管事故,采用宏观结构应力分析与微观研究相结合的方法进行了主蒸汽爆管失效分析。失效分析考虑了管系力学、部件结构、材质成分、金相组织、材料力学性能、断面分析等因素。结果表明主蒸汽爆管原因在于母材选用不合理以及使用的焊材不匹配,同时焊接接头存在气孔、裂纹等严重缺陷。分析结果表明应加强重要动力管道的系统性安全检验,消除不应该存在的安全隐患,以避免出现类似问题。

关键词: 燃煤电厂, 主蒸汽, 爆管, 失效分析, 支吊架, 应力分析

Abstract: Regarding the main steam pipe explosion accident that occurred in a power plant, the analysis on the failure of the main steam pipe is conducted by means of the combination of macro structural stress analysis and microscopic study. Several related factors, such as piping mechanics, component structure, material component, metallographic structure, piping mechanical property, and section analysis, etc are also taken into account. The result shows that the unsuitable base metal and mismatched welding material are the major causes of the explosion. In addition, there exist some other severe defects in the weld joints such as cracks and blowholes. From the result it is pointed out that the safety testing of the power pipeline has to be enhanced to remove the potential safety risks and avoid such problems happening again.

Key words: coal-fired power plant, main steam, pipe explosion, failure analysis, pipe support and hanger, stress analysis

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