(2) Strictly focus on the quality of film scanning in the scanning process, and regularly carry out cleaning and maintenance to avoid problems such as scratches and white lines on the film.(3) The finest image quality that can be distinguished on the digitized image shall be consistent with that on the film and meet the requirements for film evaluation.(4) Digital image files formed by film scanning shall be saved in DICONDE format and jpg format (or other common formats). The DICONDE format is not modifiable and is saved as the original record of the film; the jpg format (or other common format) is used for regular preview and retrieval in the PIS system, and the files in both formats are simultaneously uploaded to the PIS system.(5) The digital image files formed in the film scanning are saved with the 3-level directory of ‘Pipeline name-Valve station interval position-Weld No.’. The original film in the construction period is named as ‘weld No.-2 digits serial number’. The radiographic film formed in the excavation and re-photograph is named as ‘weld No. - FP-2 digit No.’ The re-photograph film is named as ‘weld No. - XF-2 digit No.