Iron or steel (excluding cast iron); line pipe of a kind used for oil or gas pipelines (not seamless), longitudinally submerged arc welded, having circular cross-sections, external diameter exceeds 406.4mm

730511 Longitudinally submerged arc welded:

73051110 Of iron or nonalloy steel

7305111030 With an external diameter exceeding 406.4 mm but not exceeding 609.6 mm

7305111060 With an external diameter exceeding 609.6 mm

7305115000 Of alloy steel

7305110000 Iron or steel (excluding cast iron); line pipe of a kind used for oil or gas pipelines (not seamless), longitudinally submerged arc welded, having circular cross-sections, external diameter exceeds 406.4mm

73051100 Longitudinally submerged arc welded

73051100 Longitudinally submerged arc welded