Tubes, pipes and hollow profiles, seamless, of iron (other than cast iron) or steel

730411 Iron or steel (excluding cast iron); seamless, line pipe of a kind used for oil or gas pipelines, of stainless steel 730419 Iron or steel (excluding cast iron or stainless steel); seamless, line pipe of a kind used for oil or gas pipelines 730422 Steel, stainless; seamless, drill pipe, of a kind used in drilling for oil or gas 730423 Iron or steel (excluding cast iron or stainless steel); seamless, drill pipe, of a kind used in drilling for oil or gas 730424 Steel, stainless; seamless, casing and tubing, of a kind used in drilling for oil or gas 730429 Iron or steel (excluding cast iron or stainless steel); seamless, casing and tubing, of a kind used in drilling for oil or gas 730431 Iron or non-alloy steel (excluding cast iron); seamless, cold-drawn or cold-rolled, tubes, pipes and hollow profiles of circular cross-section 730439 Iron or non-alloy steel (excluding cast iron); seamless, (excluding cold-drawn or cold-rolled), tubes, pipes and hollow profiles of circular cross-section 730441 Steel, stainless; cold-drawn or cold-rolled (cold-reduced), tubes and pipes of circular cross-section 730449 Steel, stainless; (excluding cold-drawn or cold-rolled), tubes pipes and hollow profiles of circular cross-section 730451 Steel, alloy (not stainless steel); seamless, cold-drawn or cold-rolled (cold-reduced), tubes, pipes and hollow profiles of circular cross-section 730459 Steel, alloy (not stainless steel); (excluding cold-drawn or cold-rolled), tubes, pipes and hollow profiles of circular cross-section 730490 Iron or steel (excluding cast iron); seamless, tubes, pipes and hollow profiles, seamless, n.e.c. in heading no. 7304