摘要
3PE管防腐层与管体剥离会导致阴极保护屏蔽,进而引起一系列的腐蚀及应力腐蚀开裂风险,威胁油气管道运行安全。利用ABAQUS有限元模拟计算3PE防腐管热残余应力的Von Mises等效应力分布,预测可能发生失效的区域。评估了各个防腐层涂层厚度及收尾坡形等因素对残余热应力的影响。通过分析模拟结果采取相应措施最大程度减小残余热应力的形成,可有效控制3PE防腐层剥离事件的发生。
Once the 3PE coating was peeled off from the pipe,the cathodic protection system was failed and would cause a series of corrosion and cracking risks threatening the operation of oil and gas pipelines.The Von Mises equivalent stress distribution of thermal residual stress of 3PE anticorrosion pipe was simulated and calculated by ABAQUS finite element method,and the failure area was predicted.The effects of coating thickness and tail slope shape on residual thermal stress were evaluated.By analyzing the simulation results,the formation of thermal residual stress is minimized by taking corresponding measures,which can effectively control the peeling of 3PE pipelines.
出处
《石油天然气学报》
CAS
2019年第4期51-56,共6页
Journal of Oil and Gas Technology
