德国规范AD2000要求:
NDT shall be carried out I principle after the last heat treatment or forming process.无损检测原则上应在最终热处理后执行。
If weld can not be accessible after the last heat treatment, other agreements maybe made between the parties concerned. In this case of weld which is subjected to both RT and UT testing. RT may be performed prior to the last heat treatment.如果最终热处理后焊缝无法进行无损检测,生产厂家、用户和第三方可协商其它的方法。在这种情况下,焊缝应进行射线和超声检测,此时射线检测可在最终热处理前执行。