针对钛/钢、锆/钢复合板容器设备常因覆层盖板焊缝的微小缺陷造成设备在压力试验时出现微泄漏，而常规单一无损检测方法不易检出或精确定位该焊缝微小缺陷的问题，采用氦气检漏法-荧光渗透法或氨气检漏法-荧光渗透法组合的检测工艺，实现了微泄漏点的精确定位，解决了微泄漏的检测问题。

The micro leakage often appears during pressure test of vessels equipment with titanium/steel and zirconium/steel cladding plate because of the tiny defect of the weld of the cover plate. However, the common practice single NDT method is not easy to detect or accurately position the defect. Through demonstration of three kinds of combination detection process, the results show that the helium leak detection-fluorescent penetrant method, as well as the ammonia leak detection-fluorescent penetrant method can realize accurate positioning of micro leakage point, and solve the problem of micro leakage detection.