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Figure 10 – TOFD theory on weld inspection. Tipical image formation.

Talking about automation in ultrasonic inspection, the use of TOFD technique on weld eliminates the need of multi-channels UT pulse-echo devices decreasing inspection costs. “Time-of-flight” gives information about defect depths and heights ins an better way than conventional pulse-echo UT.

The use of TOFD on the evaluation of turrets defects was decided because of the great amount of TOFD application on weld inspection with good results.

Figure 11 – TOFD theory on weld inspection. Real weld inspection image with defects.

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