33210 - Gray & Ductile iron foundries (Miscellaneous)
33211 - Ductile iron pressure pipe & Fittings
3321121 - - Ductile iron pressure pipe, <14 in. (inside diameter)
3321122 - - Ductile iron pressure pipe: 3-10 in.
3321123 - - Ductile iron pressure pipe, 14 in. or more (inside diameter)
3321124 - - Ductile iron pressure pipe: 10-20 in.
3321125 - - Ductile iron fittings, <14 in. (inside diameter)
3321126 - - Ductile iron fittings, 14 in. or more (inside diameter)
3321127 - - Ductile iron pressure pipe: 20-54 in.
3321130 - - Ductile iron pressure pipe: Other
3321133 - - Ductile iron pressure pipe Fittings: 3-10 in.
3321136 - - Ductile iron pressure pipe Fittings: 10-20 in.
3321139 - - Ductile iron pressure pipe Fittings: 20-54 in.
3321142 - - Ductile iron pressure pipe Fittings: Other
3321199 - - Ductile iron pressure pipe & Fittings (Miscellaneous)
33212 - Ductile iron castings (General)
3321222 - - Ductile iron castings: Automotive uses
3321224 - - Ductile iron castings: Construction & Utility uses
3321231 - - Ductile iron castings: Valve uses
3321232 - - Ductile iron castings: Electric & Electronic equipment uses
3321233 - - Ductile iron castings: Machinery uses
3321234 - - Ductile iron castings: Heat resistant parts + Coke oven door parts
3321239 - - Ductile iron castings: all other Uses
3321240 - - Other Ductile iron castings for all other Uses, incl Electric & Electronic equipment uses, Heat-resistant parts & Coke oven door parts
3321299 - - Ductile iron castings (Miscellaneous)
33216 - Molds & Stools for Heavy steel ingots
33217 - Cast iron pressure pipe & Fittings
3321731 - - Cast iron pressure pipe, <14 in. (inside diameter)
3321732 - - Cast iron pressure pipe: 3-in.
3321733 - - Cast iron pressure pipe, 14 in. or more (inside diameter)
3321734 - - Cast iron pressure pipe: 10-20 in.
3321735 - - Cast iron pressure pipe fittings, <14 in. (inside diameter)
3321736 - - Cast iron pressure pipe fittings, 14 in. or more (inside diameter)
3321737 - - Cast iron pressure pipe: 20-54 in.
3321740 - - Cast iron pressure pipe: Other
3321743 - - Cast iron pressure pipe Fittings: 3-10 in.
3321746 - - Cast iron pressure pipe Fittings: 10-20 in.
3321749 - - Cast iron pressure pipe Fittings: 20-54 in.
3321752 - - Cast iron pressure pipe Fittings: Other
3321799 - - Cast iron pressure pipe & Fittings (Miscellaneous)
33218 - Cast iron soil pipe & Fittings + Special fittings
3321822 - - Cast iron soil pipe: =<3 in.
3321824 - - Cast iron soil pipe: 3-5 in.
3321827 - - Cast iron soil pipe: =>5 in.
3321830 - - Cast iron soil pipe Fittings: <3 in.
3321833 - - Cast iron soil pipe Fittings: 3-5 in.
3321836 - - Cast iron soil pipe Fittings: =>5 in.
3321899 - - Cast iron soil pipe & Fittings + Special fittings (Miscellaneous)
33219 - Gray iron castings (General)
3321931 - - Gray iron castings: Rolls for Rolling mills
3321939 - - Gray iron castings: Automotive uses
3321949 - - Gray iron castings: Construction & Utility uses
3321998 - - Gray iron castings: all other Uses
3321999 - - Gray iron castings (Miscellaneous)
3321XX0 - - Gray & Ductile iron foundries (Miscellaneous - Volume)
3321XX2 - - Gray & Ductile iron foundries (Miscellaneous - Speciality)