(1) The technical parameters of digital scanning of radiographic inspection film: optical density range 0.5-4.5, digital resolution ≥12bit, density contrast sensitivity ≤0.02, the finest image quality of the digital image should be consistent with that on the film, the format of digital image should be DICONDE.(2) The scanning should be strictly performed according to the instrument instructions. There should be certain personnel assigned to ensure that the equipment works normally, avoid scratches on the film and white lines on the digital image.(3) The scanned file is named according to the rule of "weld No. - sequence number". All film scanning files shall be stored digitally and back up to prevent file loss due to damage of the digital storage device.(4) Before scanning the radiographic film, two positions of intersections of the spiral welds of the front pipe and the rear pipe shall be marked with a circle to check the consistency of the weld and the radiographic film.