![]() Small defects such as these can be verified by Liquid Penetrant Testing (Dye check). Some porosity, cracks, and slag inclusions are visible and may not need further inspection to require their removal. Slag inclusions, undercut, and cracks are usually unacceptable. Porosity (bubbles) in the weld are usually acceptable to a certain degree. ![]() Defects can be varied and classified as critical or non critical. These types of defects occur when the welding procedures are not adhered to possible causes include the current setting, arc length, electrode angle, and electrode manipulation. ![]() Incomplete penetration forms channels and crevices in the root of the weld which can cause serious issues in pipes because corrosive substances can settle in these areas. Lack of fusion is the poor adhesion of the weld bead to the base metal incomplete penetration is a weld bead that does not start at the root of the weld groove.
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