| 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: | | | | |
| 7306.30.10 | 00 | Having a wall thickness of less than 1.65 mm | kg | Free | | 25% |
| 7306.30.30 | 00 | Having a wall thickness of 1.65 mm or more: | | | | |
| 7306.30.50 | 10 | Suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heaters, whether or not cold drawn | kg | | | |
| 7306.40.10 | | Having a wall thickness of less than 1.65 mm | | Free | | 36% |
| 7306.40.10 | 10 | Containing more than 0.5 percent by weight of nickel: | | | | |
| 7306.40.10 | 10 | Containing more than 1.5 percent but less than 5 percent by weight of molybdenum | kg | | | |
| 7306.40.50 | | Having a wall thickness of 1.65 mm or more | | Free | | 11% |
| 7306.40.50 | 15 | Suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heaters, whether or not cold-drawn | kg | | | |
| 7306.40.50 | 40 | Containing more than 0.5 percent but less than 24 percent by weight of nickel | kg | | | |
| 7306.40.50 | 42 | Containing less than 15 percent by weight of chromium | kg | | | |
| 7306.40.50 | 62 | Containing more than 0.5 percent but less than 24 percent by weight of nickel: | | | | |
| 7306.40.50 | 62 | Containing more than 1.5 per- cent but less than 5 percent by weight of molybdenum | kg | | | |
| 7306.40.50 | 85 | Containing more than 0.5 percent but less than 24 percent by weight of nickel | kg | | | |
| 7306.50.10 | 00 | Having a wall thickness of less than 1.65 mm | kg | Free | | 35% |
| 7306.50.30 | 00 | Having a wall thickness of 1.65 mm or more: | | | | |
| 7306.50.50 | 10 | Suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heaters, whether or not cold-drawn | kg | | | |
| 7306.61.10 | 00 | Having a wall thickness of 4 mm or more: | | | | |
| 7306.61.50 | 00 | Having a wall thickness of less than 4 mm: | | | | |
| 7306.69.10 | 00 | Having a wall thickness of 4 mm or more: | | | | |
| 7306.69.50 | 00 | Having a wall thickness of less than 4 mm: | | | | |
| 7307.19.30 | 70 | With mechanical, push-on (rubber compression) or flanged joints attached | kg | | | |
| 7307.91.50 | 10 | With an inside diameter of less than 360 mm: | | | | |
| 7307.93.30 | | With an inside diameter of less than 360 mm: | | | | |
