| 7306.11.00 | 50 | With an outside diameter exceeding 114.3 mm | kg |  |  |  | 
| 7306.19.10 | 10 | With an outside diameter not exceeding 114.3 mm | kg |  |  |  | 
| 7306.19.10 | 50 | With an outside diameter exceeding 114.3 mm | kg |  |  |  | 
| 7306.19.51 | 10 | With an outside diameter not exceeding 114.3 mm | kg |  |  |  | 
| 7306.19.51 | 50 | With an outside diameter exceeding 114.3 mm | kg |  |  |  | 
| 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: |  |  |  |  | 
| 7306.21.80 |  | Tubing |  | Free |  | 10% | 
| 7306.21.80 | 10 | Imported with coupling | kg |  |  |  | 
| 7306.29.10 |  | Casing: |  |  |  |  | 
| 7306.29.10 | 30 | Imported with coupling | kg |  |  |  | 
| 7306.29.60 |  | Tubing: |  |  |  |  | 
| 7306.29.60 | 10 | Imported with coupling | kg |  |  |  | 
| 7306.29.81 | 10 | Imported with coupling | kg |  |  |  | 
| 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: |  |  |  |  | 
| 7306.30.30 | 00 | Tapered steel pipes and tubes principally used as parts of illuminating articles | kg | Free |  | 45% | 
| 7306.30.50 | 10 | Suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heaters, whether or not cold drawn | kg |  |  |  | 
| 7306.30.50 | 20 | Other, cold-rolled (cold-reduced) with a wall thickness not exceeding 2.54 mm | kg |  |  |  | 
| 7306.30.50 | 25 | With an outside diameter not exceeding 114.3 mm: |  |  |  |  | 
| 7306.30.50 | 25 | Imported with coupling | kg |  |  |  | 
| 7306.30.50 | 28 | Internally coated or lined with a non-electrically insulating material, suitable for use as electrical conduit | kg |  |  |  | 
| 7306.30.50 | 35 | Tube and pipe hollows for redrawing | kg |  |  |  | 
| 7306.30.50 | 40 | Other, imported with coupling | kg |  |  |  |