| 73 | | | HS Code for Articles of iron, iron or steel |
| | 73044910 | Non cold rolling (drawing) stainless steel seamless boiler tubes ( |
| | 73045110 | Other cold-rolled steel seamless boiler tubes |
| | 73045910 | Other non-rolled steel seamless boiler tubes |
| | 73045990 | Other non-rolled alloy steel seamless circular cross-section |
| | 73049000 | Nes seamless steel tubes and hollow profiles |
| | 73051100 | Oil longitudinal submerged arc welding, gas crude steel |
| | 73051200 | Other longitudinal welds oil, natural gas crude steel |
| | 73051900 | Other petroleum, natural gas crude steel |
| | 73052000 | Other drilling for oil, natural gas thick sleeve |
| | 73053100 | The other longitudinal weld thick steel tube |
| | 73053900 | Other welding methods other crude steel tube |
| | 73059000 | Crude steel pipe cross section nes |
| | 73062900 | Other oil and gas drilling and the guide cannula |
| | 73063011 | Other non-iron alloy welded tube cross-section |
| | 73063019 | Other non-iron alloy welded tube cross-section |
| | 73063090 | Other non-iron alloy welded tube cross-section |
| | 73064000 | Other thin stainless steel welded tube cross-section |
| | 73065000 | Other thin circular section steel welded tube |
| | 73066100 | Other welded tube of rectangular or square cross-section |
| | 73066900 | Other non-circular cross-section of another welded tube |
| | 73071100 | No malleable cast iron tube or pipe fittings |
| | 73072900 | Other stainless steel tube or pipe fittings |
| | 73079200 | Nes a steel threaded elbows, pipe, tube |
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