气液分离器液相出口管线的腐蚀原因分析
Corrosion Causes Analysis of the Gas-Liquid Separator Liquid Phase Outlet Pipe
贾雅妮 1韩守鹏 2刘天庆 1李燕姣 1卢雪梅1
作者信息
- 1. 机械工业上海蓝亚石化设备检测所有限公司 上海 201620
- 2. 上海市特种设备监督检验技术研究院 上海 200062
- 折叠
摘要
某油田气液分离器的液相出口弯头和直管段均发现壁厚减薄,并存在2处穿孔泄漏.通过宏观检查、化学成分分析、金相分析、硬度检测、腐蚀形貌分析和垢物成分分析等方法,结合实际工况,对分离器液相出口弯头及直管的腐蚀原因进行了分析.结果表明,垢下腐蚀是导致管壁减薄、穿孔的主要原因,介质中的Cl和O等元素加速了腐蚀过程.
Abstract
The liquid phase outlet elbow and straight pipe section of a gas-liquid separator in a certain oilfield were found to have wall thickness reduction,and there were two perforation leakages.Through macro examination,chemical composition analysis,metallographic observation,hardness testing,as well as corrosion morphology and fouling analysis,etc.,combined with actual working conditions,the corrosion causes of the liquid phase outlet elbow and straight pipe of the separator were analyzed.The results showed that under-deposit corrosion was the main cause of pipe wall thinning and perforation,and the elements such as Cl and O in the medium accelerated the corrosion process.
关键词
气液分离器/失效分析/垢下腐蚀/腐蚀减薄Key words
Gas-liquid separator/Failure analysis/Under-deposit corrosion/Corrosion thinning引用本文复制引用
出版年
2024
NETL
NSTL
万方数据