73049030

Other, having an external diameter of less than 140 mm and containing less than 0.45% by weight of carbon

73049090

Other

7305

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.

73051100

Line pipe of a kind used for oil or gas pipelines:'Longitudinally submerged arc welded

730512

Other, longitudinally welded:

73051210

Electric resistance welded (ERW)

73051290

Other

730519

Other:

73051910

Spiral or helical submerged arc welded

73051990

Other

73052000

Casing of a kind used in drilling for oil or gas

730531

Other, welded:'Longitudinally welded: