Ultrasonic testing uses the transmission of high frequency sound waves into a material to detect imperfections within the material or changes in material properties. The most commonly used ultrasonic testing method is Pulse echo, wherein sound is introduced into the test object and reflections are returned to a receiver from internal imperfections and geometrical surfaces of the part.
Non-destructive testing is used for in-service inspection and for condition monitoring of operating plant. It is also used for measurement of components and for the measurement of physical properties such as hardness and internal stress.
Around the world, NDT technicians do thousands of inspections and tests every day to assess new product quality, equipment condition and reliability. By doing so, they help prevent failures in nuclear power, aviation, transportation, oil and gas, petrochemical plants and anywhere else where public safety or the environment could be significantly impacted. All without destroying or disassembling the item that is being inspected.
(as per ANSI/ASNT CP-105,ASNT Standard Topical Outlines for Qualification of Non-destructive Testing Personnel, latest edition)Download Ultrasonic Testing Syllabus