BS 7706:1993 Guide to calibration and setting-up of the ultrasonic time of flight diffraction (TOFD) technique for the detection, location and sizing of flaws
2014BS EN ISO 16828:2014 Non-destructive testing. Ultrasonic testing. Time-of-flight diffraction technique as a method for detection and sizing of discontinuities
2009BS EN 583-6:2008 Non-destructive testing - Ultrasonic examination - Time-of-flight diffraction technique as a method for detection and sizing of discontinuities
1993BS 7706:1993 Guide to calibration and setting-up of the ultrasonic time of flight diffraction (TOFD) technique for the detection, location and sizing of flaws