This document specifies the principles for ultrasonic thickness measurement of metallic and non-metallic materials by direct contact, based on measurement of time-of-flight of ultrasonic pulses only.
BS EN 14127:2004 history
2011BS EN 14127:2011 Non-destructive testing. Ultrasonic thickness measurement
2004BS EN 14127:2004 Non-destructive testing - Ultrasonic thickness measurement