6
Common metals and their alloys; Common metals, unwrought or semi-wrought; Small items of metal hardware; Tubes of metal; Copper tubes; Coated tubes of copper; Elbows, sleeves and junctions of tubes of metal, in particular in copper; Collars of metal for fastening pipes; Clips of metal for cables and pipes; Ducts of metal, for central heating installations
11
Taps for pipes and pipelines; Boiler pipes [tubes] for heating installations; Exhaust pipes for sanitary installations; Tubes and pipes for apparatus, plants and installations for heating, cooling, steam generating, cooking, drying, ventilating, water supply and sanitary purposes; Pipes [parts of sanitary installations]; Elbow bends (plastic -) for pipes [parts of sanitary installations]; Underfloor heating apparatus and installations; Coils [parts of distilling, heating or cooling installations]; Heat-stabilized polypropylene pipes for heating installations
17
Flexible hoses, not of metal; Pipe muffs, not of metal; Junctions, not of metal, for pipes; Non-metal gaskets; Insulating sheaths for industrial pipes; Insulation jackets for industrial pipes; Insulating plaster
40
Metal treating; Metal plating; Chromium plating; Millworking; Metal casting; Galvanization; Laminating; Metal tempering