Visual examination is performed to check weld size and appearance. This test is perform to detect surface cracks, fusion between weld bead, gas hole, excessive undercut and more. It is used in conjunction with all other NDT methods. For visual examination required several CWI’s staff.
Visual Testing is a cost effective method used for quality control. A minimum of equipment is needed.
Many Non Destructive Testing (NDT) techniques used for the inspection of welding is surface crack detection. We shall briefly examine the two most common methods of surface crack detection, Liquid Penetrant Testing (PT), sometimes referred to as Magnetic Particle Testing (MT).
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