摘要
压力容器在高压、振动的条件下长时间运行会频繁出现裂纹、刺漏等缺陷,这些缺陷在振动条件下进一步扩展会导致疲劳开裂。为探究这些缺陷产生的原因,以便于尽早发现和预防,由塔里木油田牵头对牙哈作业区169台压缩机附属压力容器进行了详尽的专项检测和技术分析,并对故障率最高的三级出口球罐进行了化学分析、金相分析、硬度测定、有限元分析和应变测试。最终确定,缺陷产生的原因是焊缝和热影响区硬度值过高、应力偏大以及振动带来的交变载荷引起的机械疲劳。
Under the operation condition of high pressure and vibration for a long time,the pressure vessel will have cracks and leakage frequently.Further extension of these defects under vibration condition will lead to fatigue cracking.In order to explore the causes of these defects,so as to find and prevent the defecte as soon as possible,Tarim Oilfield took the lead to carry out detailed special inspection and technical analysis on 169 auxiliary pressure vessels of compressors in Yaha operation area,and performed the chemical analysis,metallographic analysis,hardness measurement,finite element analysis and strain test for the three-stage outlet spherical tanks with the highest failure rate.Finally,it is determined that the causes of the defects are too high hardness of welds and HAZs,excessive stress and mechanical fatigue induced by alternating load due to vibration.
作者
李亚军
李循迹
王立辉
燕自峰
龚道永
张玉福
魏星
LI Yajun;LI Xunji;WANG Lihui;YAN Zifeng;GONG Daoyong;ZHANG Yufu;WEI Xing(PetroChinaTarim Oilfield,Korla 841000,China;LANPEC Technologies Limited,Lanzhou 730070,China;Machine Industry Shanghai Lanya Petrochemical Equipment Inspection Institute Co.,Ltd.,Shanghai 201518,China)
出处
《石油工程建设》
2020年第6期84-88,共5页
Petroleum Engineering Construction
关键词
压力容器
裂纹
振动
机械疲劳
检验检测
pressure vessel
crack
vibration
mechanical fatigue
inspection and detection
