This International Standard specifies techniques for detection of surface imperfections in welds in ferromagnetic materials, including the heat affected zones, by means of magnetic particle testing. The techniques are suitable for most welding processes and joint configurations. Variations in the basic techniques that will provide a higher or lower test sensitivity, are described in Annex A.
本標準規定了鐵磁性鋼焊縫中缺欠的磁粉檢測顯示的驗收等級。 此驗收等級主要用于制造檢驗，若認為合適，也可用于在役檢驗。 本標準中的驗收等級基于采用GB/T 26951規定的方法和附錄A推薦的參數可望達到的檢測能力。驗收等級與焊接標準、技術條件或法規等有關。有關顯示的驗收等級的更多信息可在產品或應用標準中查到。
