本美国国家标准以推荐实施规程SNT-TC-1A的成功为基础，为人员认证提供了全面的最低要求。其中包括一级、二级和三级人员的无损检测讲师和雇主认证要求，以及三级人员的ASNT无损检测三级认证要求。现在包括热/红外测试的要求。本标准已获得美国国家标准协会（ANSI）的批准。

This standard builds upon the success of Recommended Practice No. SNT-TC-1A by providing comprehensive minimum requirements for personnel certification. Included are requirements for NDT instructors and employer certification of Level I, II, and III personnel, and a requirement for the ASNT NDT Level III certification of Level III personnel. Now includes requirements for thermal/infrared testing.