在一台厚壁容器射线检测中底片所示影像形貌无法判断是否为缺陷。利用超声检测确定其埋藏深度,刨开该处焊缝发现两处横跨环焊缝的贯穿性裂纹缺陷。可见在大壁厚容器的射线检测中,裂纹检出率受到诸多因素的影响,导致检出率不高,可靠性不够。故在条件允许的情况下,应首选超声波及相关的检测方法,或采用射线检测和超声波检测相结合的方法。 In a thick-walled container ray detection film shown in the image morphology can not determine whether the defect. Ultrasonic testing was used to determine the depth of burial, and the weld at the place was found to have penetrated crack defects across the girth weld. Visible in the thick wall container ray detection, the crack detection rate by many factors, resulting in the detection rate is not high, the reliability is not enough. Therefore, when the conditions permit, the preferred ultrasonic and related detection methods, or the combination of ray detection and ultrasonic detection methods.