- Seamless pipes and tubes (1)
- Pipes, seamless steel (4)
- Tubes, seamless steel (2)
- Tubing, mechanical or hypodermic sizes: cold drawn stainless (3)
- Welded pipe and tubes (5)
- Conduit: welded, lock joint, or heavy riveted (1)
- Pipes, wrought: welded, lock joint, or heavy riveted (6)
- Tubes, wrought: welded or lock joint (7)
- Well casing, wrought: welded, lock joint, or heavy riveted (4)
