This International Standard defines the general principles of monitoring by tandem and longitudinal and longitudinal-transverse (LLT) wave techniques for the detection of dis ontinuities perpendicular to the surface.
NF A09-335*NF EN ISO 16826:2014 Referenced Document
EN 1330-4 Non-destructive testing - Terminology - Part 4: Terms used in ultrasonic testing
ISO 16810 Non-destructive testing - Ultrasonic testing - General principles
ISO 16811 Non-destructive testing - Ultrasonic testing - Sensitivity and range setting