What are the different type of welds called?

There are several types of welds, including butt welds, where two pieces are joined end-to-end; lap welds, where one piece overlaps the other; corner welds, used to join two pieces at a right angle; and T-welds, which connect two pieces at a T-shape. Other types include edge welds and plug welds. Each type serves specific applications based on the joint configuration and structural requirements.