Line pipe of a kind used for oil or gas pipelines, having circular crosssections and an external diameter of > 406,4 mm, of iron or steel, longitudinally submerged arc welded
Line pipe of a kind used for oil or gas pipelines, having circular crosssections and an external diameter of > 406,4 mm, of flatrolled products of iron or steel (excl. products longitudinally arc welded)
Line pipe of a kind used for oil or gas pipelines, having circular crosssections and an external diameter of > 406,4 mm, of iron or steel, longitudinally arc welded (excl. products longitudinally submerged arc welded)