NF A09-254-2*NF EN ISO 20769-2:2018 Non-destructive testing - Radiographic inspection of corrosion and deposits in pipes by X- and gamma rays - Part 2 : double wall radiographic inspection
2018NF A09-254-2*NF EN ISO 20769-2:2018 Non-destructive testing - Radiographic inspection of corrosion and deposits in pipes by X- and gamma rays - Part 2 : double wall radiographic inspection