Inspection of a Welded T-joint

A T-joint consists of two plates welded at 90° to each other in the form of a 'T'.  Commonly used in the structural industry, T-joints generally use fillet or groove type welds on each side of the vertical plate, these welds can be ‘part’ or ‘full’ penetration welds, each presenting their own challenges.

Due to the complex geometry of the part, in an A-Scan only view, signals can be difficult to interpret. small inaccuracies in probe positioning or the angle of reflection may place a signal as a defect in the weld when in fact it is it is a reflection from the internal wall. situations like this can lead to false calls and unnecessary repairs.

  A009_Welded-TJoint.pdf  (734.9KB)