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See Chinese contents: NB/T 47013.2-2015 NB/T 47013.2-2015: [Including 2018XG1] Nondestructive testing of pressure equipments - Part 2: Radiographic testing
This Part of NB/T 47013 specifies detection technology and quality grading requirements for X-ray and gamma-ray used for welding joints on metal melting of pressure equipment.
