在役电站锅炉定期检验过程中, 磁粉探伤是对承压部件内外部表面检验使用最多的表面探伤方法。结合JB/T 4730.4—2005中的有关规定, 深入分析了电站锅炉定期检验过程中焊缝表面磁粉检测的工艺及实际操作技术, 以提高表面缺陷的检出率。结合标准规定, 对检出缺陷的处理进行了一定程度的探讨。

During the periodic inspection for in-service power plant boiler, magnetic particle testing was used mostly for the inner and outer inspection of the pressure vessel parts. Combining the relative requirements in standard JB/T 4630.4—2005, the magnetic particle testing procedure and practice operation technique for the weld inspection during the inspection were deeply analyzed to improve the detection efficiency for the surface defect. And combining the standard, the proceeding methods for detected defects were discussed.