We've compiled a list of the most common weld discontinuities and how to correct them. A discontinuity is a flaw in the weld, but they are only considered to be weld defects when they exceed the limit allowed by the welding code. Learn more about welding codes here. Each code determines the extent of the discontinuity before it is classified as a defect and must be repaired.
For example, if a welding code acceptance criteria allows for undercut up to 1/32" deep and the welding inspector measures undercut that is 1/16" deep, then that weld is rejectable. If the undercut measured was 1/32" or less, then the weld is acceptable.
All defects are discontinuities, but not all discontinuities are defects. Understanding this forms the key to the proper analysis of any weld performed in accordance with the requirements of a welding code or specification.
Incomplete Joint Penetration
Concave Root Surface (Suck-back)
Earlbeck Technical Center
Still need some help? The Earlbeck Technical Center offers welder training and weld testing services in the Mid-Atlantic Area. Not only do we conduct testing services to any code, but we provide training to ensure you are ready to take your certification test. Click here to learn more.