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本文简单介绍了15MnNbR球罐历次检验情况,本次全面检验中应用TOFD检测技术对环焊缝进行检测,从检测面的选择、检测工艺参数的设置、检测发现缺陷,采用射线方法复验、缺陷性质返修确认为裂纹,说明TOFD技术应用于球罐焊缝裂纹缺陷的检测是一种行之有效的方法,不仅能检测内部裂纹,而且能发现扫描面盲区内的近表面裂纹。
In this paper, we briefly introduce the 15MnNbR spherical tank past inspection. In this comprehensive inspection, the TOFD inspection technology is used to inspect the girth weld. The selection of the test surface, the setting of the process parameters, the detection of defects, the re-inspection by the ray method, It is confirmed that the TOFD technique is used to detect crack defects in the weld of the spherical tank. It is an effective method to detect not only the internal cracks, but also the near-surface cracks in the blind area of the scanning surface.