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