一、引言近些年来,无损检验(NDT)技术的发展和操作人员能力的改进,业已探测出越来越多的焊缝缺陷。在现有建造标准中,焊缝缺陷允许标准之根据,似乎是武断的。一般来说,不管所论接头的使用条件如何,这样一些标准均要求一种通用的质量水平。研究工作表明,所有的焊接接头,都会含有缺陷,是否探查得出来,则取决于所用的 I. INTRODUCTION In recent years, more and more weld defects have been detected in the development of non-destructive testing (NDT) technology and the improvement of operator’s capabilities. In the existing construction standards, the basis of the allowable weld defects, it seems arbitrary. In general, such standards require a common level of quality, regardless of the conditions of use of the joints in question. Research shows that all welded joints, will contain defects, whether to probe out, it depends on the use of