| 730511 | 730511 - Iron or steel (excluding cast iron); line pipe of a kind used |
| 730512 | 730512 - Iron or steel (excluding cast iron); line pipe of a kind used |
| 730519 | 730519 - Iron or steel (excluding cast iron); line pipe of a kind used |
| 730520 | 730520 - Iron or steel (excluding cast iron); casing of a kind used in |
| 730531 | 730531 - Iron or steel (excluding cast iron); tubes and pipes (other t |
| 730539 | 730539 - Iron or steel (excluding cast iron); tubes and pipes (other t |
| 730590 | 730590 - Iron or steel (excluding cast iron); tubes and pipes n.e.c. i |