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近年来,电站锅炉汽包纵环焊缝普查中,相继发现焊缝质量问题,这就直接威胁着电站的安全运行.因此如何提高在役设备的检测技术,确定缺陷大小和方位是目前急待探讨的课题.目前国内压力容器的焊缝质量栓验,普遍推广JB1152-81标准,标准中对缺陷大小的测定是以三条线(测长线、定量线、判废线)做为主要判据,这对于制造厂是方便可行的.而对于在役设备的检验,由于厂家及出厂年限不同,检验方法和标准也时有变更,显然按现行
In recent years, the investigation of power plant boiler drum vertical and horizontal seam welds, one after another found weld quality problems, which is a direct threat to the safe operation of power plants.So how to improve the detection equipment in service, to determine the size and orientation of defects is the urgent need Discussed the subject.At present, the pressure vessel quality test of the bolt, the general promotion of JB1152-81 standard, the standard size of the defect is determined by the three lines (measuring long line, quantitative line, sentenced to waste line) as the main criterion, This is convenient and convenient for the manufacturer.And for the test of the equipment in service, due to different manufacturers and factory years, test methods and standards are also subject to change, it is clear that the current