- Seamless pipes and tubes (2)
- Pipes, seamless steel (3)
- Tubes, seamless steel (1)
- Tubing, mechanical or hypodermic sizes: cold drawn stainless (1)
- Welded pipe and tubes (2)
- Conduit: welded, lock joint, or heavy riveted (1)
- Tubes, wrought: welded or lock joint (6)
