我国压力容器无损检测标准JB4 730— 94规定的标准反射体有长横孔和短横孔 2种试块 ,2种试块对超声波反射规律的研究表明 ,由此可能引起对缺陷评定的矛盾 ,因此 ,2种试块并存在 1个标准中是不合理的。通过 2种试块的比较 ,并参照国外标准 ,建议在标准修订时只保留 1种长横孔试块 ,即CSK -ⅡA试块。 China’s pressure vessel non-destructive testing standards JB4 730-94 standard reflector body with long holes and short holes two kinds of test blocks, two kinds of test blocks on the ultrasonic reflection of the law shows that this may lead to conflict assessment of defects, Therefore, it is unreasonable for two kinds of test blocks to exist in one standard. By comparing two kinds of test blocks and referring to foreign standards, it is suggested that only one kind of long horizontal hole test block, ie, the CSK-IIA test block be reserved when the standard is revised.