Joint designation B-U8-GF specifies which type of weld?

The joint designation B-U8-GF indicates a specific type of groove weld configuration. In this designation, the letter "B" refers to the basic joint type, which in this case is a bevel. The "U" denotes that the groove is a U-groove shape, and the "8" signifies the depth of the groove in eighths of an inch. The "GF" at the end stands for "Groove Face" which pertains to the surface preparation for the weld.

In this context, the configuration described aligns precisely with that of a single-J-groove weld. A single-J groove involves a single beveled edge that is prepared in such a way that it resembles a "J" shape when seen in profile, allowing for effective penetration and fusion.

Understanding this standard nomenclature in welding helps in visualizing the weld joints and ensures proper welding techniques are applied, which is crucial for achieving structural integrity and performance in welded assemblies.