PCM+ACVG技术在钢管外防腐层检测中的应用  

Application of PCM and ACVG Techniques in the Detection of External Anti-Corrosive Coating of Steel Pipe

作　　者：赵永威 ZHAO Yongwei(The School of Mechanical Engineering,Tongji University)

机构地区：[1]同济大学机械与能源工程学院

出　　处：《上海煤气》2024年第4期8-10,共3页Shanghai Gas

摘　　要：防腐层失效将造成钢管保护能力下降,加速钢管腐蚀,给钢管安全运行埋下隐患。PCM技术作为一种先进的非破坏性检测技术,能够有效检测钢管外防腐层的缺陷,且能全面有效评估外防腐层的整体性能,经常被用来对燃气钢管外防腐层进行检测。选取某段运行钢管作为现场测试对象,采用PCM技术,施加信号至钢管,精确记录电流随检测路径距离的衰减情况;再结合管线资料对目标钢管防腐层情况进行分析;然后使用ACVG法定位腐蚀点,并结合现场开挖测试进行验证,从而为燃气钢管维护管理提供策略指导。The failure of anti-corrosive coating will cause the steel pipe’s protection ability to decline,accelerate the corrosion of the steel pipe and cause potential safety hazards for the pipeline's operation.PCM(Pipeline Current Mapper)technique,as an advanced non-destructive detection technology,is effective in detecting flaws in the external anti-corrosive coating of steel pipe.It can also fully and effectively evaluate the overall performance of the external anti-corrosive coating and is often used to test the external anti-corrosive coating of gas steel pipe.A certain section of the running steel pipe was selected as the field test subject.The PCM technology was utilized to apply the signal to steel pipe and accurately record the attenuation of the current with the detection path distance.The anti-corrosive coating of the target steel pipe was analyzed in combination with the pipeline data,and then the ACVG(Alternating Current Voltage Gradient)method was employed to precisely locate the corrosion point,and the onsite excavations test was combined for verification,so as to provide strategic guidance for the maintenance and management of the steel pipe.

关 键 词：PCM技术 ACVG 外防腐层缺陷 非开挖检测技术 

分 类 号：TE988.2[石油与天然气工程—石油机械设备]