Curved Arrays for Improved Inspection of Small Pipe Welds

This paper describes computer modeling and testing of phased arrays curved in the passive axis to improve focusing on small diameter pipe welds; in practice, a couple of curvatures satisfy most diameter and wall thickness applications. The modeling was followed by experimental testing using one of the curved arrays. Not surprisingly, the curved array showed signifi cant improvements over a fl at array on reference notch sizing. One of the major advantages of using curved arrays —as opposed to matrix arrays —is that curving is an economical and simple solution.

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