Non-destructive testing - Radiographic inspection of corrosion and deposits in pipes by X - and gamma rays - Part 1: Tangential radiographic inspection (ISO 20769-1:2018)
Non-destructive testing -- Image quality of radiographs -- Part 5: Determination of the image unsharpness and basic spatial resolution value using duplex wire-type image quality indicators— 16 стр.
Non-destructive testing - Radiographic inspection of corrosion and deposits in pipes by X- and gamma rays - Part 2: Double wall radiographic inspection (ISO 20769-2:2018)— 42 стр.