| 7304.59.80 | 30 | Having an outside diameter exceeding 114.3 mm but less than 190.5 mm: | | | | |
| 7304.59.80 | 30 | Having a wall thickness less than 12.7 mm | kg | | | |
| 7304.59.80 | 45 | Having a wall thickness less than 12.7 mm | kg | | | |
| 7304.59.80 | 50 | Having a wall thickness of 12.7 mm or more but less than 19 mm | kg | | | |
| 7304.59.80 | 55 | Having a wall thickness of 19 mm or more | kg | | | |
| 7304.59.80 | 60 | Having an outside diameter exceeding 285.8 mm but not exceeding 406.4 mm: | | | | |
| 7304.59.80 | 60 | Having a wall thickness less than 12.7 mm | kg | | | |
| 7304.90 | | Other: | | | | |
| 7304.90.10 | 00 | Having a wall thickness of 4 mm or more: | | | | |
| 7304.90.10 | 00 | Of iron or nonalloy steel | kg | Free | | 1% |
| 7304.90.30 | 00 | Of alloy steel | kg | Free | | 8.5% |
| 7304.90.50 | 00 | Having a wall thickness of less than 4 mm: | | | | |
| 7304.90.50 | 00 | Of iron or nonalloy steel | kg | Free | | 25% |
| 7304.90.70 | 00 | Of alloy steel | kg | Free | | 35% |
| 7305 | | Other tubes and pipes (for example, welded, riveted or similarly closed), having circular cross sections, the external diameter of which exceeds 406.4 mm, of iron or steel: | | | | |
| 7305.11 | | Line pipe of a kind used for oil or gas pipelines: | | | | |
| 7305.11 | | Longitudinally submerged arc welded: | | | | |
| 7305.11.10 | | Of iron or nonalloy steel | | Free | | 5.5% |
| 7305.11.10 | 30 | With an external diameter exceeding 406.4 mm but not exceeding 609.6 mm | kg | | | |
| 7305.11.10 | 60 | With an external diameter exceeding 609.6 mm | kg | | | |
| 7305.11.50 | 00 | Of alloy steel | kg | Free | | 10% |
| 7305.12 | | Other, longitudinally welded: | | | | |
| 7305.12.10 | | Of iron or nonalloy steel | | Free | | 5.5% |
| 7305.12.10 | 30 | With an external diameter exceeding 406.4 mm but not exceeding 609.6 mm | kg | | | |
| 7305.12.10 | 60 | With an external diameter exceeding 609.6 mm | kg | | | |
