What does TOFD stand for?

Time of Flight Diffraction

Time of Flight Diffraction is an advanced ultrasonic testing method used to detect and size defects in materials, particularly in welds and thick-walled components. This technique works by sending ultrasonic waves into the material and analyzing the diffracted signals that bounce off the tips of any flaws inside. Unlike conventional ultrasonic testing that focuses on reflected signals, this method uses the time it takes for these diffracted waves to travel to determine the location and size of internal defects with high precision.

This technique is widely used in industries like power generation and oil and gas, especially for safety-critical inspections. It is valued for its speed, accuracy, and ability to store digital records of the inspection.