摘要
对埋地管道进行防腐层检测最常用的方法是电流梯度法和电位梯度法,在理论条件下可以获得非常准确的检测数值与评价结果,然而,在实际检测中却常出现检测评价结果与实际不符的情况。文章结合工程实例,分析了电流梯度法检测架空出露管道段、防腐层破损点、拐点和三通处存在的问题,对防腐层检测提出了改进建议。检测前应首先找出被检测管道上影响防腐层检测的各种因素,并确定他们的具体位置,然后合理布置检测点位。
The most often used methods to inspect anticorrosion layer of buried pipeline are the current gradient method and the potential gradient method. Although under theoretical conditions theses methods can offer very exact inspection data and assessment results, in practical inspections they often give discrepancy between inspection results and actual status. In combination with a practical project, this paper analyses existing problems in inspecting overground pipeline section, outcropped pipeline section, damaged points of anticorrosion layer, bends and tee joints by current gradient method, and brings forward improving proposals, that are to find factors affecting anticorrosion layer inspection and determine their locations, then arrange reasonably inspecting points on the inspected pipeline.
出处
《石油工程建设》
2008年第1期36-39,共4页
Petroleum Engineering Construction
关键词
埋地管道
防腐层
检测技术
电流梯度法
buried pipeline
anticorrosion
inspection technology
current gradient method
