Section 15 Base metals and articles of base metal 73 Articles of iron or steel 73 05 Other circular tubes and pipes, diameter >406.4mm, of iron or steel 73 05 19 Iron/steel line pipe, spirally welded, circular x-section,>406.4mm ext. diam. Commodity Code Description 73 05 19 00 Iron/steel line pipe, spirally welded, circular x-section,>406.4mm ext. diam. 73 05 19 10 Spiral or helical submerged arc welded 73 05 19 90 Other
