Time Of Flight Diffraction
This method is used for in-service welds and components. It sends ultrasonic waves through the material, and based on returning signals, can display, measure and record in real time defects in the material.
This detection method uses low amplitude waves that indicate the tips of cracks by diffraction of the waves. By measuring the time it takes for two sets of waves to make it to a receiver, a complete image of the weld and any damage can be identified.
This is one of the fastest methods of non destructive testing. Usually only one scan is required to find the necessary defect information. Complete record keeping of results, can track the growth or change of any flaws, so that valid risk based assessments can be calculated and cost effectively managed.