Category B weld joint refers to which kind of joint?

Category B weld joint refers to which kind of joint?

• A. Circumferential Joint
• B. Butt Weld
• C. Longitudinal Seam
• D. Fillet Weld

Answer: (C)

The concept here is how weld joints on cylindrical shells are classified by their orientation. A longitudinal seam is the weld that runs along the length of the cylinder, formed when rolled plates are edge-welded end-to-end along the axis of the shell. This orientation-specific designation distinguishes it from a circumferential joint, which runs around the vessel’s circumference, and from general weld types like a fillet weld or a butt weld that can apply in different directions. So, Category B refers to the longitudinal seam because it identifies the weld laid lengthwise along the cylinder, rather than around it or at a corner/intersection.

The concept here is how weld joints on cylindrical shells are classified by their orientation. A longitudinal seam is the weld that runs along the length of the cylinder, formed when rolled plates are edge-welded end-to-end along the axis of the shell. This orientation-specific designation distinguishes it from a circumferential joint, which runs around the vessel’s circumference, and from general weld types like a fillet weld or a butt weld that can apply in different directions.

So, Category B refers to the longitudinal seam because it identifies the weld laid lengthwise along the cylinder, rather than around it or at a corner/intersection.