| 7306.50.50 | 50 | With an outside diameter not exceeding 114.3 mm | kg | | | |
| 7306.50.50 | 70 | With an outside diameter exceeding 114.3 mm but not exceeding 406.4 mm | kg | | | |
| 7306.61 | | Other, welded, of noncircular cross section: | | | | |
| 7306.61 | | Of square or rectangular cross section: | | | | |
| 7306.61.10 | 00 | Having a wall thickness of 4 mm or more: | | | | |
| 7306.61.10 | 00 | Of iron or nonalloy steel | kg | Free | | 1% |
| 7306.61.30 | 00 | Of alloy steel | kg | Free | | 28% |
| 7306.61.50 | 00 | Having a wall thickness of less than 4 mm: | | | | |
| 7306.61.50 | 00 | Of iron or nonalloy steel | kg | Free | | 25% |
| 7306.61.70 | | Of alloy steel | | Free | | 35% |
| 7306.61.70 | 30 | Of stainless steel | kg | | | |
| 7306.61.70 | 60 | Other | kg | | | |
| 7306.69 | | Of other noncircular cross section: | | | | |
| 7306.69.10 | 00 | Having a wall thickness of 4 mm or more: | | | | |
| 7306.69.10 | 00 | Of iron or nonalloy steel | kg | Free | | 1% |
| 7306.69.30 | 00 | Of alloy steel | kg | Free | | 28% |
| 7306.69.50 | 00 | Having a wall thickness of less than 4 mm: | | | | |
| 7306.69.50 | 00 | Of iron or nonalloy steel | kg | Free | | 25% |
| 7306.69.70 | | Of alloy steel | | Free | | 35% |
| 7306.69.70 | 30 | Of stainless steel | kg | | | |
| 7306.69.70 | 60 | Other | kg | | | |
| 7306.90 | | Other: | | | | |
| 7306.90.10 | 00 | Of iron or nonalloy steel | kg | Free | | 5.5% |
| 7306.90.50 | 00 | Of alloy steel | kg | Free | | 10% |
| 7307 | | Tube or pipe fittings (for example, couplings, elbows, sleeves), of iron or steel: | | | | |
