242021 Line pipe of a kind used for oil or gas pipelines, welded, of an external diameter of > 406,4 mm, of steel

24202110 Line pipe, of a kind used for oil or gas pipelines, longitudinally welded, of an external diameter > 406,4 mm, of steel 24202150 Line pipe, of a kind used for oil or gas pipelines, other than longitudinally welded, of an external diameter > 406,4 mm, of steel