油田用承压钢管的质量要求很高,每根钢管都需要按照相关标准进行严格的检测。在使用漏磁法进行检测时,纵向伤检测的特殊性对检测技术及设备的设计提出了较高的要求。介绍一种基于永磁多极磁化的旋转探伤系统,对平直钢管实现在线质量监控,适合于钢管生产厂家进行高速批量检测。 High pressure steel pipe with high quality requirements, each pipe needs to be strictly tested in accordance with relevant standards. When using the magnetic flux leakage method to test, the particularity of the longitudinal injury detection puts forward higher requirements for the design of the detection technology and equipment. This paper introduces a rotary inspection system based on permanent magnet multipolar magnetization, which realizes on-line quality monitoring of flat steel pipe and is suitable for high-speed batch test of steel pipe manufacturer.