ISO 16828:2012定义了飞行时间衍射（TOFD）技术应用于低合金碳钢部件不连续性检测和尺寸确定的一般原则。它也可用于其他类型的材料，前提是在应用TOFD技术时，必须考虑材料的几何形状、声学特性和检测灵敏度。 虽然它在一般情况下适用于ISO 16810涵盖的材料和应用中的不连续性，但它包含了对焊接应用的参考。选择这种方法是为了明确超声波探头的位置和扫描方向。 除非参考文件中另有规定，否则ISO 16828的最低要求: 2012年适用。 除非另有明确规定，否则ISO 16828:2012适用于ISO 16811中定义的以下产品类别:a）类别1，无限制；b） 第2类和第3类的限制适用于第9条所述。 4类和5类产品的检验需要特殊程序。第9条也提到了这些问题。 ISO 10863中描述了使用TOFD进行焊缝检查的技术。 ISO 15626中给出了相关的验收标准。

ISO 16828:2012 defines the general principles for the application of the time-of-flight diffraction (TOFD) technique for both detection and sizing of discontinuities in low alloyed carbon steel components. It can also be used for other types of materials, provided the application of the TOFD technique is performed with necessary consideration of geometry, acoustical properties of the materials, and the sensitivity of the examination. Although it is applicable, in general terms, to discontinuities in materials and applications covered by ISO 16810, it contains references to the application on welds. This approach has been chosen for reasons of clarity as to the ultrasonic probe positions and directions of scanning. Unless otherwise specified in the referencing documents, the minimum requirements of ISO 16828:2012 are applicable. Unless explicitly stated otherwise, ISO 16828:2012 is applicable to the following product classes as defined in ISO 16811: a) class 1, without restrictions; b) classes 2 and 3, restrictions apply as stated in Clause 9. The inspection of products of classes 4 and 5 requires special procedures. These are also addressed in Clause 9. Techniques for the use of TOFD for weld inspection are described in ISO 10863. The related acceptance criteria are given in ISO 15626.