Inspection of a Welded T-joint

The main types of T-joint welds are inspected with conventional UT, where common defects are generally cracks and lack of fusion. Having a better understanding of the defects can certainly help the technicians become more alert, especially when considering the main problematic areas.

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A T-joint consists of two plates welded at approximately 90° to each other in the form of T. Commonly used in the Structural industry, T-joints are generally fillet or groove type welds and in NDT sector referred to as weld overlays. Inspection can be challenging due to the actual weld geometries and the undesirable (repetitive) echoes within the test piece. Hence it’s difficult to accurately identify potential defects and of course their correct location.

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