| 730410 | Line pipe Of a kind used for oil or gas pipelines |
| 730411 | 730411 - Iron or steel (excluding cast iron); seamless, line pipe of a |
| 730419 | 730419 - Iron or steel (excluding cast iron or stainless steel); seaml |
| 730420 | 730420 - Casings, tubing and drill pipe, for oil drilling |
| 730421 | 730421 - -- drill pipe |
| 730422 | 730422 - Steel, stainless; seamless, drill pipe, of a kind used in dri |
| 730423 | 730423 - Iron or steel (excluding cast iron or stainless steel); seaml |
| 730424 | 730424 - Steel, stainless; seamless, casing and tubing, of a kind used |
| 730429 | 730429 - Iron or steel (excluding cast iron or stainless steel); seaml |
| 730431 | 730431 - Iron or non-alloy steel (excluding cast iron); seamless, cold |
| 730439 | 730439 - Iron or non-alloy steel (excluding cast iron); seamless, (exc |
| 730441 | 730441 - Steel, stainless; cold-drawn or cold-rolled (cold-reduced), t |
| 730449 | 730449 - Steel, stainless; (excluding cold-drawn or cold-rolled), tube |
| 730451 | 730451 - Steel, alloy (not stainless steel); seamless, cold-drawn or c |
| 730459 | 730459 - Steel, alloy (not stainless steel); (excluding cold-drawn or |
| 730490 | 730490 - Iron or steel (excluding cast iron); seamless, tubes, pipes a |