Section 15 Base metals and articles of base metal 73 Articles of iron or steel 73 05 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 73 05 39 - - Other 73 05 39 00 - - Other Commodity Code Description 73 05 39 00 000 - - Other