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See Chinese contents: GB/T 11345-2013 GB/T 11345-2013: Non-destructive testing of welds -- Ultrasonic testing -- Techniques, testing levels, and assessment
This standard specifies the techniques for the manual ultrasonic testing of fusion-welded joints in metallic materials with thickness greater than or equal to 8 mm which exhibit low ultrasonic attenuation (especially that due to scatter) at object temperatures from 0 ~ 60 degree Celcius. It is primarily intended for use on full penetration welds where both the welded and parent material are ferritic.
