34980 - Fabricated pipe & Pipe fittings
3498013 - - Fabricated pipe & Fittings: Iron & Steel
3498015 - - Fabricated pipe & Fittings: Aluminum & Aluminum-base alloy
3498017 - - Fabricated pipe & Fittings: Copper & Copper-base alloy
3498019 - - Fabricated pipe & Fittings: all other Nonferrous fabricated pipe & Pipe fittings
3498XX0 - - Fabricated pipe & Fittings (Miscellaneous - Volume)
3498XX2 - - Fabricated pipe & Fittings (Miscellaneous - Speciality)