平板对接焊缝是压力容器中最常见的焊缝,对于焊缝中的裂纹、未熔合等面状危害性缺陷,超声波探伤比射线探伤有更高的检出率。超声波探伤中人为因素对检测结果影响大,工艺性强,对超声波检测人员的素质要求高。检测人员不仅要具备熟练的超声波探伤技术,还应了解有关的焊接基本知识,如焊接接头形式、坡口形式、焊接方法和可能产生的缺陷方向、性质等,从而获 Flat butt weld is the most common weld in pressure vessel. For flaw in weld and non-fusion flaw, ultrasonic flaw detection has a higher detection rate than radiographic flaw detection. Ultrasonic testing of human factors on the test results of a large, strong technology, the quality of the ultrasonic testing personnel demanding. Inspector should not only have a skilled ultrasonic flaw detection technology, but also should understand the basic knowledge of welding, such as the form of welding joints, groove forms, welding methods and possible defects in the direction, nature, etc., which won