What is the term for a weld made at the back of a single groove weld?

The term for a weld made at the back of a single groove weld is "back weld." This type of weld is applied from the opposite side of the base metal and serves several purposes, including reinforcing the welded joint and ensuring complete penetration of the groove. In welding applications, back welds can help in minimizing the potential for cracks and improving the overall strength and integrity of the connection.

Understanding the distinction among the various types of welds is crucial for welders, as each type has specific uses and benefits depending on the joint design and application. A backing weld is similar but is specifically referred to as a filler material that supports the weld pool; it is not the same as a back weld, which emphasizes the weld made from the backside. Other terms like support weld and edge weld refer to entirely different processes and applications unrelated to the context of backing a single groove weld. Therefore, the back weld clearly defines the action of reinforcing the weld from the opposite side, highlighting its importance in structural integrity.