NF A09-254-1*NF EN ISO 20769-1:2018 Non-destructive testing - Radiographic inspection of corrosion and deposits in pipes by X- and gamma rays - Part 1 : tangential radiographic inspection
2018NF A09-254-1*NF EN ISO 20769-1:2018 Non-destructive testing - Radiographic inspection of corrosion and deposits in pipes by X- and gamma rays - Part 1 : tangential radiographic inspection