1. Butt joint:
In Butt welded type, the parts lie in the same plane and are joined at their edges.
2. Corner joint:
The parts in a corner joint form a right angle and are joined at the center of the angle.
3. Lap joint:
In a Tee-joint, one joint is right angle to the other joint in the approximate shape of the letter “T”.
5. Edge joint:
The parts in edge joint are parallel with at least one of their edges in common and the joint is made at the common edge(s).