7304 Tubes, pipes and hollow profiles, seamless, of iron or steel (excl. products of cast iron)

7304 (01/1988-..) Tubes, pipes and hollow profiles, seamless, of iron or steel (excl. products of cast iron) 73041010 (01/1988-12/2006) Line pipe of a kind used for oil or gas pipelines, seamless, of iron or steel, of an external diameter of <= 168,3 mm (excl. products of cast iron) 73041030 (01/1988-12/2006) Line pipe of a kind used for oil or gas pipelines, seamless, of iron or steel, of an external diameter of > 168,3 mm but <= 406,4 mm (excl. products of cast iron) 73041090 (01/1988-12/2006) Line pipe of a kind used for oil or gas pipelines, seamless, of iron or steel, of an external diameter of > 406,4 mm (excl. products of cast iron) 73041100 (01/2007-..) Line pipe of a kind used for oil or gas pipelines, seamless, of stainless steel 73041910 (01/2007-..) Line pipe of a kind used for oil or gas pipelines, seamless, of iron or steel, of an external diameter of <= 168,3 mm (excl. products of stainless steel or of cast iron) 73041930 (01/2007-..) Line pipe of a kind used for oil or gas pipelines, seamless, of iron or steel, of an external diameter of > 168,3 mm but <= 406,4 mm (excl. products of stainless steel or of cast iron) 73041990 (01/2007-..) Line pipe of a kind used for oil or gas pipelines, seamless, of iron or steel, of an external diameter of > 406,4 mm (excl. products of stainless steel or of cast iron) 73042010 (01/1988-12/1995) Drill pipe of a kind used for drilling for oil or gas, of iron or steel (excl. products of cast iron) 73042091 (01/1988-12/1995) Casing and tubing of a kind used for drilling for oil or gas, seamless, of iron or steel, of an external diameter <= 406,4 mm (excl. products of cast iron) 73042099 (01/1988-12/1995) Casing and tubing of a kind used for drilling for oil or gas, seamless, of iron or steel, of an external diameter > 406,4 mm (excl. products of cast iron) 73042100 (01/1996-12/2006) Drill pipe, seamless, of a kind used in drilling for oil or gas, of iron or steel (excl. products of cast iron) 73042200 (01/2007-..) Drill pipe, seamless, of stainless steel, of a kind used in drilling for oil or gas 73042300 (01/2007-..) Drill pipe, seamless, of a kind used in drilling for oil or gas, of iron or steel (excl. products of stainless steel or of cast iron) 73042400 (01/2007-..) Casing and tubing, seamless, of a kind used for drilling for oil or gas, of stainless steel 73042910 (01/2007-..) Casing and tubing of a kind used for drilling for oil or gas, seamless, of iron or steel, of an external diameter <= 168,3 mm (excl. products of cast iron) 73042911 (01/1996-12/2006) Casing and tubing of a kind used for drilling for oil or gas, seamless, of iron or steel, of an external diameter <= 406,4 mm (excl. products of cast iron) 73042919 (01/1996-12/2006) Casing and tubing of a kind used for drilling for oil or gas, seamless, of iron or steel, of an external diameter > 406,4 mm (excl. products of cast iron) 73042930 (01/2007-..) Casing and tubing of a kind used for drilling for oil or gas, seamless, of iron or steel, of an external diameter > 168,3 mm, but <= 406,4 mm (excl. products of cast iron) 73042990 (01/2007-..) Casing and tubing of a kind used for drilling for oil or gas, seamless, of iron or steel, of an external diameter > 406,4 mm (excl. products of cast iron) 73043110 (01/1988-12/2005) Tubes, pipes and hollow profiles, seamless, of circular cross-section, of iron or non-alloy steel, cold-drawn or cold-rolled `cold-reduced`, with attached fittings, for gases or liquids, for civil aircraft (excl. cast iron products) 73043120 (01/2006-..) Precision tubes, seamless, of circular cross-section, of iron or non-alloy steel, cold-drawn or cold-rolled `cold-reduced` (excl. line pipe of a kind used for oil or gas pipelines or casing and tubing of a kind used for drilling for oil or gas) 73043180 (01/2006-..) Tubes, pipes and hollow profiles, seamless, of circular cross-section, of iron or non-alloy steel, cold-drawn or cold-rolled `cold-reduced` (excl. cast iron products, line pipe of a kind used for oil or gas pipelines, casing and tubing of a kind used for drilling for oil or gas and precision tubes) 73043191 (01/1988-12/2005) Precision tubes, seamless, of circular cross-section, of non-alloy steel, cold-drawn or cold-rolled `cold-reduced` (excl. cast iron products and line pipe of a kind used for oil or gas pipelines or casing and tubing of a kind used for drilling for oil or gas and pipes with attached fittings, for gases or liquids, for civil aircraft) 73043199 (01/1988-12/2005) Tubes, pipes and hollow profiles, seamless, of circular cross-section, of iron or non-alloy steel, cold-drawn or cold-rolled `cold-reduced` (excl. cast iron products, line pipe of a kind used for oil or gas pipelines, casing and tubing of a kind used for drilling for oil or gas and pipes with attached fittings, for gases or liquids, for civil aircraft, and precision tubes) 73043910 (01/1988-12/2021) Tubes, pipes and hollow profiles, seamless, of circular cross-section, of iron or non-alloy steel, not cold-drawn or cold-rolled `cold-reduced`, unworked, straight and of uniform wall-thickness, for use solely in the manufacture of tubes and pipes with other cross-sections and wall-thicknesses (excl. cast iron products) 73043920 (01/1988-12/2005) Tubes, pipes and hollow profiles, seamless, of circular cross-section, of iron or non-alloy steel, not cold-drawn or cold-rolled `cold-reduced`, with attached fittings, for gases or liquids, for civil aircraft (excl. cast iron products) 73043930 (01/1988-12/2008) Tubes, pipes and hollow profiles, seamless, of circular cross-section, of iron (excl. cast iron) or non-alloy steel, not cold-drawn or cold-rolled `cold-reduced`, of an external diameter of > 421 mm and a wall-thickness of > 10,5 mm (excl. line pipe of a kind used for oil or gas pipelines and casing and tubing of a kind used for drilling for oil or gas) 73043950 (01/2022-..) Threaded or threadable tubes `gas pipe`, seamless, of iron or non-alloy steel (excl. of cast iron) 73043951 (01/1988-12/2005) Threaded or threadable tubes, seamless, of iron or non-alloy steel, plated or coated with zinc (excl. cast iron products) 73043952 (01/2006-12/2021) Threaded or threadable tubes `gas pipe`, seamless, of iron or non-alloy steel, plated or coated with zinc (excl. cast iron products) 73043958 (01/2006-12/2021) Threaded or threadable tubes `gas pipe`, seamless, of iron or non-alloy steel (excl. cast iron products and products plated or coated with zinc) 73043959 (01/1988-12/2005) Threaded or threadable tubes, seamless, of iron or non-alloy steel (excl. cast iron products and products plated or coated with zinc) 73043982 (01/2022-..) Tubes, pipes and hollow profiles, seamless, of circular cross-section, of iron or non-alloy steel, of an external diameter of <= 168,3 mm (excl. cold-drawn or cold-rolled, of cast iron, line pipe of a kind used for oil or gas pipelines, casing, tubing and drill pipe of a kind used in drilling for oil or gas and tubes, and gas pipes of subheading 7304 39 50) 73043983 (01/2022-..) Tubes, pipes and hollow profiles, seamless, of circular cross-section, of iron or non-alloy steel, of an external diameter of > 168,3 mm but <= 406,4 mm (excl. cold-drawn or cold-rolled, of cast iron, line pipe of a kind used for oil or gas pipelines, casing, tubing and drill pipe of a kind used in drilling for oil or gas and tubes, and gas pipes of subheading 7304 39 50) 73043988 (01/2022-..) Tubes, pipes and hollow profiles, seamless, of circular cross-section, of iron or non-alloy steel, of an external diameter of > 406,4 mm (excl. cold-drawn or cold-rolled, of cast iron, line pipe of a kind used for oil or gas pipelines, casing, tubing and drill pipe of a kind used in drilling for oil or gas and tubes, and gas pipes of subheading 7304 39 50) 73043991 (01/1988-12/2005) Tubes, pipes and hollow profiles, seamless, of circular cross-section, of iron or non-alloy steel, not cold-drawn or cold-rolled `cold-reduced`, of an external diameter of <= 168,3 mm (excl. cast iron products, line pipe of a kind used for oil or gas pipelines, casing and tubing of a kind used for drilling for oil or gas and tubes, pipes and hollow profiles of heading 7304.39.10 to 7304.39.59) 73043992 (01/2006-12/2021) Tubes, pipes and hollow profiles, seamless, of circular cross-section, of iron or non-alloy steel, not cold-drawn or cold-rolled (cold-reduced), of an external diameter of <= 168,3 mm (excl. cast iron products, line pipe of a kind used for oil or gas pipelines, casing, tubing and drill pipe of a kind used in drilling for oil or gas and tubes, pipes and hollow profiles of subheadings 7304 39 10 to 7304 39 58) 73043993 (01/1988-12/2021) Tubes, pipes and hollow profiles, seamless, of circular cross-section, of iron or non-alloy steel, not cold-drawn or cold-rolled (cold-reduced), of an external diameter of > 168,3 mm but <= 406,4 mm (excl. cast iron products, line pipe of a kind used for oil or gas pipelines, casing, tubing and drill pipe of a kind used for drilling for oil or gas and tubes, pipes and hollow profiles of subheadings 7304 39 10 to 7304 39 58) 73043998 (01/2009-12/2021) Tubes, pipes and hollow profiles, seamless, of circular cross-section, of iron or non-alloy steel, not cold-drawn or cold-rolled `cold-reduced`, of an external diameter of > 406,4 mm (excl. cast iron products, line pipe of a kind used for oil or gas pipelines, casing and tubing of a kind used for drilling for oil or gas and tubes, pipes and hollow profiles of heading 7304.39.52 and 7304.39.58) 73043999 (01/1988-12/2008) Tubes, pipes and hollow profiles, seamless, of circular cross-section, of iron or non-alloy steel, not cold-drawn or cold-rolled `cold-reduced`, of an external diameter of > 406,4 mm (excl. cast iron products, line pipe of a kind used for oil or gas pipelines, casing and tubing of a kind used for drilling for oil or gas and tubes, pipes and hollow profiles of heading 7304.39.30 to 7304.39.58) 73044100 (01/2006-..) Tubes, pipes and hollow profiles, seamless, of circular cross-section, of stainless steel, cold-drawn or cold-rolled `cold-reduced` (excl. line pipe of a kind used for oil or gas pipelines, casing and tubing of a kind used for drilling for oil or gas) 73044110 (01/1988-12/2005) Tubes, pipes and hollow profiles, seamless, of circular cross-section, of stainless steel, cold-drawn or cold-rolled `cold-reduced`, with attached fittings, for gases or liquids, for civil aircraft 73044190 (01/1988-12/2005) Tubes, pipes and hollow profiles, seamless, of circular cross-section, of stainless steel, cold-drawn or cold-rolled `cold-reduced` (excl. line pipe of a kind used for oil or gas pipelines or of a kind used for drilling for oil or gas and pipes with attached fittings, for gases or liquids, for civil aircraft) 73044910 (01/1988-12/2021) Tubes, pipes and hollow profiles, seamless, of circular cross-section, of stainless steel, not cold-drawn or cold-rolled `cold-reduced`, unworked, straight and of uniform wall-thickness, for use solely in the manufacture of tubes and pipes with other cross-sections and wall-thicknesses 73044930 (01/1988-12/2005) Tubes and pipes of circular cross-section, of stainless steel, not cold-drawn or cold-rolled, seamless, with attached fittings, for gases or liquids, for civil aircraft 73044983 (01/2022-..) Tubes, pipes and hollow profiles, seamless, of circular cross-section, of stainless steel, of an external diameter of <= 168,3 mm (excl. cold-drawn or cold-rolled, line pipe of a kind used for oil or gas pipelines, and casing and tubing of a kind used for drilling for oil or gas and tubes) 73044985 (01/2022-..) Tubes, pipes and hollow profiles, seamless, of circular cross-section, of stainless steel, of an external diameter of > 168,3 mm but <= 406,4 mm (excl. cold-drawn or cold-rolled, line pipe of a kind used for oil or gas pipelines, and casing and tubing of a kind used for drilling for oil or gas and tubes) 73044989 (01/2022-..) Tubes, pipes and hollow profiles, seamless, of circular cross-section, of stainless steel, of an external diameter of > 406,4 mm (excl. cold-drawn or cold-rolled, line pipe of a kind used for oil or gas pipelines, and casing and tubing of a kind used for drilling for oil or gas and tubes) 73044991 (01/1988-12/2005) Tubes, pipes and hollow profiles, seamless, of circular cross-section, of stainless steel, not cold-drawn or cold-rolled `cold-reduced`, of an external diameter of <= 406,4 mm (excl. line pipe of a kind used for oil or gas pipelines, casing and tubing of a kind used for drilling for oil or gas and tubes, pipes and hollow profiles of heading 7304.49.10 to 7304.49.30) 73044992 (01/2006-12/2007) Tubes, pipes and hollow profiles, seamless, of circular cross-section, of stainless steel, not cold-drawn or cold-rolled `cold-reduced`, of an external diameter of <= 406,4 mm (excl. line pipe of a kind used for oil or gas pipelines, casing and tubing of a kind used for drilling for oil or gas and tubes, pipes and hollow profiles of heading 7304.49.10) 73044993 (01/2008-12/2021) Tubes, pipes and hollow profiles, seamless, of circular cross-section, of stainless steel, not cold-drawn or cold-rolled `cold-reduced`, of an external diameter of <= 168,3 mm (excl. line pipe of a kind used for oil or gas pipelines, casing and tubing of a kind used for drilling for oil or gas and tubes, pipes and hollow profiles of heading 7304.49.10) 73044995 (01/2008-12/2021) Tubes, pipes and hollow profiles, seamless, of circular cross-section, of stainless steel, not cold-drawn or cold-rolled `cold-reduced`, of an external diameter of > 168,3 mm but <= 406,4 mm (excl. line pipe of a kind used for oil or gas pipelines, casing and tubing of a kind used for drilling for oil or gas and tubes, pipes and hollow profiles of heading 7304.49.10) 73044999 (01/1988-12/2021) Tubes, pipes and hollow profiles, seamless, of circular cross-section, of stainless steel, not cold-drawn or cold-rolled `cold-reduced`, of an external diameter of > 406,4 mm (excl. line pipe of a kind used for oil or gas pipelines, casing and tubing of a kind used for drilling for oil or gas and tubes, pipes and hollow profiles of heading 7304.49.10) 73045110 (01/2022-..) Tubes, pipes and hollow profiles, seamless, of circular cross-section, of alloy steel other than stainless, cold-drawn or cold-rolled `cold-reduced`, straight and of uniform wall-thickness, containing by weight >= 0,9% but <= 1,15% carbon and >= 0,5% but <= 2% chromium, whether or not containing by weight <= 0,5% molybdenum (excl. tubes, pipes and hollow profiles of subheadings 7304 19 to 7304 29) 73045111 (01/1988-12/2003) Tubes, pipes and hollow profiles, seamless, of circular cross-section, of alloy steel other than stainless, cold-drawn or cold-rolled `cold-reduced`, straight and of uniform wall-thickness, containing by weight >= 0,9% but <= 1,15% carbon and >= 0,5% but <= 2% chrome, whether or not containing by weight <= 0,5% molybdenum, of a length of <= 4,5 m (excl. tubes, pipes and hollow profiles of heading 7304.10 and 7304.20) 73045112 (01/2004-12/2021) Tubes, pipes and hollow profiles, seamless, of circular cross-section, of alloy steel other than stainless, cold-drawn or cold-rolled `cold-reduced`, straight and of uniform wall-thickness, containing by weight >= 0,9% but <= 1,15% carbon and >= 0,5% but <= 2% chrome, whether or not containing by weight <= 0,5% molybdenum, of a length of <= 0,5 m (excl. tubes, pipes and hollow profiles of subheadings 7304 19 to 7304 29) 73045118 (01/2004-12/2021) Tubes, pipes and hollow profiles, seamless, of circular cross-section, of alloy steel other than stainless, cold-drawn or cold-rolled `cold-reduced`, straight and of uniform wall-thickness, containing by weight >= 0,9% but <= 1,15% carbon and >= 0,5% but <= 2% chrome, whether or not containing by weight <= 0,5% molybdenum, of a length of > 0,5 m (excl. tubes, pipes and hollow profiles of subheadings 7304 19 to 7304 29) 73045119 (01/1988-12/2003) Tubes, pipes and hollow profiles, seamless, of circular cross-section, of alloy steel other than stainless, cold-drawn or cold-rolled `cold-reduced`, straight and of uniform wall-thickness, containing by weight >= 0,9% but <= 1,15% carbon and >= 0,5% but <= 2% chrome, whether or not containing by weight <= 0,5% molybdenum, of a length of > 4,5 m (excl. tubes, pipes and hollow profiles of heading 7304.10 and 7304.20) 73045130 (01/1988-12/2005) Tubes, pipes and hollow profiles, seamless, of circular cross-section, of alloy steel other than stainless, cold-drawn or cold-rolled `cold-reduced`, with attached fittings, for gases or liquids, for civil aircraft (excl. tubes, pipes and hollow profiles of heading 7304.51.11 and 7304.51.19) 73045181 (01/2006-..) Precision tubes, seamless, of circular cross-section, of alloy steel other than stainless, cold-drawn or cold-rolled `cold-reduced` (excl. line pipe of a kind used for oil or gas pipelines, casing and tubing of a kind used for drilling for oil and tubes, and pipes and hollow profiles, straight and of uniform wall-thickness, containing by weight >= 0,9% but <= 1,15% carbon and >= 0,5% but <= 2% chrome, whether or not containing by weight <= 0,5% molybdenum) 73045189 (01/2006-..) Tubes, pipes and hollow profiles, seamless, of circular cross-section, of alloy steel other than stainless, not cold-drawn or cold-rolled `cold-reduced` (excl. line pipe of a kind used for oil or gas pipelines, casing and tubing of a kind used for drilling for oil, precision tubes, and , pipes and hollow profiles, straight and of uniform wall-thickness, containing by weight >= 0,9% but <= 1,15% carbon and >= 0,5% but <= 2% chrome, whether or not containing by weight <= 0,5% molybdenum) 73045191 (01/1988-12/2005) Steel precision tubes, seamless, of circular cross-section, of alloy steel other than stainless, cold-drawn or cold-rolled `cold-reduced` (excl. line pipe of a kind used for oil or gas pipelines, casing and tubing of a kind used for drilling for oil and tubes, pipes and hollow profiles of heading 7304.51.11 to 7304.51.30) 73045199 (01/1988-12/2005) Tubes, pipes and hollow profiles, seamless, of circular cross-section, of alloy steel other than stainless, not cold-drawn or cold-rolled `cold-reduced` (excl. line pipe of a kind used for oil or gas pipelines, casing and tubing of a kind used for drilling for oil, precision tubes, and tubes, pipes and hollow profiles of heading 7304.51.11 to 7304.51.30) 73045910 (01/1988-12/2021) Tubes, pipes and hollow profiles, seamless, of circular cross-section, of alloy steel other than stainless, not cold-drawn or cold-rolled `cold-reduced`, unworked, straight and of uniform wall-thickness, for use solely in the manufacture of tubes and pipes with other cross-sections and wall-thicknesses 73045930 (01/2022-..) Tubes, pipes and hollow profiles of alloy steel (excl. stainless), seamless, of circular cross-section (not cold-drawn or cold-rolled), straight and of uniform wall-thickness, containing by weight >= 0,9% but <= 1,15% carbon and >= 0,5% but <= 2% chromium, whether or not containing by weight <= 0,5% molybdenum (excl. tubes, pipes and hollow profiles of subheadings 7304 19 to 7304 29) 73045931 (01/1988-12/2003) Tubes, pipes and hollow profiles of alloy steel (excl. stainless), seamless, of circular cross-section (not cold-drawn or cold-rolled), straight and of uniform wall-thickness, of a length <= 4.5m, containing by weight >= 0,9% but <= 1,15% carbon and >= 0,5% but <= 2% chrome, whether or not containing by weight <= 0,5% molybdenum (excl. tubes, pipes and hollow profiles of heading 7304.10, 7304.20 and 7304.59.10) 73045932 (01/2004-12/2021) Tubes, pipes and hollow profiles of alloy steel (excl. stainless), seamless, of circular cross-section (not cold-drawn or cold-rolled), straight and of uniform wall-thickness, of a length <= 0,5 m, containing by weight >= 0,9% but <= 1,15% carbon and >= 0,5% but <= 2% chrome, whether or not containing by weight <= 0,5% molybdenum (excl. tubes, pipes and hollow profiles of subheadings 7304 19 to 7304 29 and 7304 59 10) 73045938 (01/2004-12/2021) Tubes, pipes and hollow profiles, seamless, of circular cross-section, of alloy steel (excl. stainless) (not cold-drawn or cold-rolled) straight and of uniform wall-thickness, containing by weight >= 0,9% but <= 1,15% carbon and >= 0,5% but <= 2% chrome, whether or not containing by weight <= 0,5% molybdenum, of a length of > 0,5 m (excl. tubes, pipes and hollow profiles of subheadings 7304 19 to 7304 29 and 7304 59 10) 73045939 (01/1988-12/2003) Tubes, pipes and hollow profiles, seamless, of circular cross-section, of alloy steel (excl. stainless) (not cold-drawn or cold-rolled) straight and of uniform wall-thickness, containing by weight >= 0,9% but <= 1,15% carbon and >= 0,5% but <= 2% chrome, whether or not containing by weight <= 0,5% molybdenum, of a length of > 4,5 m (excl. tubes, pipes and hollow profiles of heading 7304.10, 7304.20 and 7304.59.10) 73045950 (01/1988-12/2005) Tubes, pipes and hollow profiles, seamless, of circular cross-section, of alloy steel other than stainless, not cold-drawn or cold-rolled `cold-reduced`, with attached fittings, for gases or liquids, for civil aircraft (excl. tubes, pipes and hollow profiles of heading 7304.59.31 to 7304.59.39) 73045982 (01/2022-..) Tubes, pipes and hollow profiles, seamless, of circular cross-section, of alloy steel other than stainless, of an external diameter of <= 168,3 mm (excl. cold-drawn or cold-rolled, line pipe of a kind used for oil or gas pipelines, casing and tubing of a kind used for drilling for oil or gas, and products of subheading 7304 59 30) 73045983 (01/2022-..) Tubes, pipes and hollow profiles, seamless, of circular cross-section, of alloy steel other than stainless, of an external diameter of > 168,3 mm but <= 406,4 mm (excl. cold-drawn or cold-rolled, line pipe of a kind used for oil or gas pipelines, casing and tubing of a kind used for drilling for oil or gas, and products of subheading 7304 59 30) 73045989 (01/2022-..) Tubes, pipes and hollow profiles, seamless, of circular cross-section, of alloy steel other than stainless, of an external diameter of > 406,4 mm (excl. cold-drawn or cold-rolled, line pipe of a kind used for oil or gas pipelines, casing and tubing of a kind used for drilling for oil or gas, and products of subheading 7304 59 30) 73045991 (01/1988-12/2005) Tubes, pipes and hollow profiles, seamless, of circular cross-section, of alloy steel other than stainless, not cold-drawn or cold-rolled `cold-reduced`, of an external diameter of <= 168,3 mm (excl. line pipe of a kind used for oil or gas pipelines, casing and tubing of a kind used for drilling for oil or gas and tubes, pipes and hollow profiles of heading 7304.59.10 to 7304.59.50) 73045992 (01/2006-12/2021) Tubes, pipes and hollow profiles, seamless, of circular cross-section, of alloy steel other than stainless, not cold-drawn or cold-rolled `cold-reduced`, of an external diameter of <= 168,3 mm (excl. line pipe of a kind used for oil or gas pipelines, casing and tubing of a kind used for drilling for oil or gas and tubes, pipes and hollow profiles of heading 7304.59.10 to 7304.59.38) 73045993 (01/1988-12/2021) Tubes, pipes and hollow profiles, seamless, of circular cross-section, of alloy steel other than stainless, not cold-drawn or cold-rolled `cold-reduced`, of an external diameter of > 168,3 mm but <= 406,4 mm (excl. line pipe of a kind used for oil or gas pipelines, casing and tubing of a kind used for drilling for oil or gas and tubes, pipes and hollow profiles of heading 7304.59.10 to 7304.59.38) 73045999 (01/1988-12/2021) Tubes, pipes and hollow profiles, seamless, of circular cross-section, of alloy steel other than stainless, not cold-drawn or cold-rolled `cold-reduced`, of an external diameter of > 406,4 mm (excl. line pipe of a kind used for oil or gas pipelines, casing and tubing of a kind used for drilling for oil or gas and tubes, pipes and hollow profiles of heading 7304.59.10 to 7304.59.38) 73049000 (01/2006-..) Tubes, pipes and hollow profiles, seamless, of non-circular cross-section, of iron or steel (excl. products of cast iron) 73049010 (01/1988-12/2005) Tubes, pipes and hollow profiles, seamless, of non-circular cross-section, of iron or steel, with attached fittings, for gases or liquids, for civil aircraft (excl. products of cast iron) 73049090 (01/1988-12/2005) Tubes, pipes and hollow profiles, seamless, of non-circular cross-section, of iron or steel (excl. products of cast iron, and tubes, pipes and hollow profiles with attached fittings, for gases or liquids, for civil aircraft)