气田供水管道内腐蚀失效分析研究  

Failure Analysis on Internal Corrosion of Gas Field Water Supply Pipeline

作　　者：陈妍君 刘畅[1] 王欢欢[2] Chen Yanjun;Liu Chang;Wang Huanhuan(CNPC Southwest Oil&Gas Filed Company Safety,Environment and Tech.Supervision Institution,Chengdu,Sichuan 610000;CNPC Southwest Oil&Gas Filed Company Northwest Sichuan Gas Field,Jiangyou,Sichuan 621700)

机构地区：[1]中国石油西南油气田分公司安全环保与技术监督研究院,四川成都610000 [2]中国石油西南油气田分公司川西北气矿,四川江油621700

出　　处：《西部特种设备》2023年第6期59-65,72,共8页Western Special Equipment

摘　　要：某气田供水管道运行期间发生两次内腐蚀失效。本研究通过扫描电镜、能谱分析等室内实验,对失效管段化学成分、金相组织、腐蚀微观形貌、腐蚀产物等进行了分析,并针对两次失效均发生在管道全线高点位置和管顶穿孔的特点,开展了输送工艺分析和对比测厚验证。结果表明该供水管道内腐蚀失效是-由ClO_(2)、Cl^(-)与水垢加速点蚀导致的。本研究还提出了气田水管道易在翻越点发生管顶点蚀的规律,为气田水管道腐蚀管控提供重要参考。One gas field water supply pipeline has been found failed twice because of internal corrosion.In addition to chemical composition analysis,microstructure analysis,scanning electron microscope observation and X-ray energy spectrum analysis,this study conducts hydraulic analysis and wall thickness measurements,in order to discover the reason why two failures both occurs on the twelve-o'clock of inwall,and also the peak of the pipeline.The result shows that ClO_(2)、Cl^(-) and scale deposit all contribute to these two failures,and that peaks of pipelines are more likely to suffer from pitting on the direction of twelve o'clock.

关 键 词：供水管道 内腐蚀 失效分析 

分 类 号：TE89[石油与天然气工程—油气储运工程]