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 <= 168,3mm (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 > 168,3mm, 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 ForDrilling for oil or gas and Pipes With Attached Fittings, for Gases or Liquids, for Civil Aircraft, and Precision Tubes) 73043910 (01/1988-..) 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) 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-..) 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-..) 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) 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-..) 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-..) 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-..) 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-..) 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 73044991 (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 <= 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-..) 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 <=?á168,3mm (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-..) 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 > 168,3mm but <= 406,4mm (Excl. Line Pipe of a Kind Used for oil or gas Pipelines, CasingAnd 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-..) 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 OfA Kind Used for Drilling for oil or gas and Tubes, Pipes and Hollow Profiles of Heading 7304.49.10) 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-..) 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-..) 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', With Attached Fittings, for Gases or Liquids, for Civil Aircraft (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-..) 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 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-..) 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-..) 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) 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-..) 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-..) 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-..) 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)