This International Standard specifies how to characterize internal displays, ie classify them as planar or non-planar. This standard is also applicable to the display exposed on the surface of the weld after removing the weld reinforcement.
GB/T 29711-2013 Referenced Document
ISO 17640 Non-destructive testing of welds - Ultrasonic testing - Techniques, testing levels, and assessment*, 2018-09-30 Update
GB/T 29711-2013 history
1970GB/T 29711-2023 Non-destructive testing of welds and ultrasonic testing of internal discontinuity characteristics of welds
2013GB/T 29711-2013 Non-destructive testing of welds.Ultrasonic testing.Characterization of indications in welds