Welding defects

Welding defects

Welding Defects:-

• Hot cracks
• Cold cracks/Delayed cracks
• Porosities
• Lack of fusion
• Incomplete/excess penetration
• Undercut
• Slag/ Inclusion
• Mismatch
• Burn through
• Root Cavity
• Caters
• Spatters

What is Meaning of Defect:-

A defect is a reject able discontinuity, which occurs in an amount great enough to render a particular object or structure unsuitable for its intended service based on criteria in the applicable code.

Classification of Defects:-

1) Planar defects / Two dimensional defects —    E.g. cracks, lack of fusion, lack of penetration, are crtical in nature and are not tolerated to any extent.

2) Voluminal defects / Three dimensional defects —   E.g. slag inclusion, cavities, porosities, etc are tolerated to a certain extent depending on the product class and applicable code.

3) Geometric defects–   E.g. excess reinforcement, underfill, root suck back, distortion are also permitted to a certain extent.

Weld Joint Discontinuities:-

Types:-