| 7304.90.10 | 00 | Having a wall thickness of 4 mm or more: | | | | |
| 7304.90.50 | 00 | Having a wall thickness of less than 4 mm: | | | | |
| 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: | | | | |
| 7305.12 | | Other, longitudinally welded: | | | | |
| 7305.19 | | Other: | | | | |
| 7305.20 | | Casing of a kind used in drilling for oil or gas: | | | | |
| 7305.20.20 | 00 | Of iron or nonalloy steel: | | | | |
| 7305.20.60 | 00 | Of alloy steel: | | | | |
| 7305.31 | | Other, welded: | | | | |
| 7305.31 | | Longitudinally welded: | | | | |
| 7305.31.40 | 00 | Other: | | | | |
| 7305.39 | | Other: | | | | |
| 7305.90 | | Other: | | | | |
| 7306 | | Other tubes, pipes and hollow profiles (for example, open seamed or welded, riveted or similarly closed), of iron or steel: | | | | |
| 7306.11.00 | | Line pipe of a kind used for oil or gas pipelines: | | | | |
| 7306.19 | | Other: | | | | |
| 7306.21 | | Casing and tubing of a kind used in drilling for oil or gas: | | | | |
| 7306.21 | | Welded of stainless steel: | | | | |
| 7306.21.30 | 00 | Casing: | | | | |
| 7306.29.10 | | Other: | | | | |
| 7306.29.10 | | Casing: | | | | |
| 7306.29.10 | | Of iron or nonalloy steel: | | | | |
| 7306.29.31 | 00 | Other: | | | | |
Harmonized Tariff Schedule of the United States inquiry: i
