Time of Flight Diffraction (TOFD)

In a TOFD system, a pair of ultrasonic probes sits on opposite sides of a weld. One of the probes, the transmitter, emits an ultrasonic pulse that is picked up by the probe on the other side, the receiver.

TOFD is widely applied in industries like construction, aerospace, manufacturing, Oil and Gas Industry, and power generation for weld inspection, pressure vessel assessment, pipeline inspection, and aerospace component evaluation

What is TOFD in UT?

Time of Flight Diffraction (TOFD) is a reliable method of nondestructive ultrasonic testing (UT) used to look for flaws in welds. TOFD uses the time of flight of an ultrasonic pulse to find the location of a reflector.