摘要
某X70钢天然气输气管道发生凹陷泄漏事故,通过宏观分析、力学性能试验、金相检验、微观分析、残余应力测试、有限元模拟等方法,对管道凹陷泄漏的原因进行了分析。结果表明:管道在铺设时受到岩石的挤压而产生凹陷,在管道服役过程中,凹陷处壁厚严重减薄,应力水平大幅升高而产生了微裂纹,裂纹逐渐扩展穿透管壁,最终导致管道泄漏。
A dent leakage accident occurred in an X70 steel natural gas pipeline.By means of macro analysis,mechanical properties test,metallographic examination,micro analysis,residual stress testing and finite element simulation,the causes of pipeline dent leakage were analyzed.The results show that the pipeline was compacted by rock during laying pipelines,which resulted in pipeline dent.During the service of the pipeline,micro cracks formed in the dent due to the wall thickness of the depression was seriously thinned and the stress level rised sharply.The crack propagated gradually and penetrated the pipeline wall,eventually led to pipeline leakage.
作者
武刚
朱丽霞
罗金恒
刘畅
李丽锋
孙明楠
WU Gang;ZHU Lixia;LUO Jinheng;LIU Chang;LI Lifeng;SUN Mingnan(CNPC Tubular Goods Research Institute,Xi'an 710077,China;CNPC Key Laboratory for PetroChina Tubular Goods Engineering,Xi'an 710077,China;HSE and Technical Supervision Research Institute of Southwest Oil & Gas Field Company, Chengdu 610041, China)
出处
《理化检验（物理分册）》
CAS
2019年第7期478-482,共5页
Physical Testing and Chemical Analysis(Part A:Physical Testing)
基金
“十三五”国家重点研发计划(2017YFC0805804)
中国石油天然气股份有限公司重大科技专项(2016E-0610)
关键词
输气管道
凹陷
泄漏
有限元模拟
gas pipeline
dent
leakage
finite element simulation
