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无损检测焊缝的目的,是防止焊缝由于缺陷的存在而引起破裂。破裂的危险性取决于三个因素:应力、材料性能和缺陷。通常无损检测方法仅针对第三个因素。所以无损检测的可靠性,只是焊缝可靠性的一个方面。
The purpose of nondestructive testing of welds is to prevent the welds from rupturing due to the presence of defects. The risk of rupture depends on three factors: stress, material properties and defects. The usual non-destructive testing method is only for the third factor. Therefore, the reliability of non-destructive testing is only one aspect of the reliability of the weld.