Copper pipes (other than parts of machines); Copper rings; Copper tubes (other than parts of machines); Thermally insulated pipes made of copper (other than parts of sanitary installations); Couplings of metal for pipes; Insulated metal pipes (other than parts of machines, engines or motors); Metal pipe fittings; Metal pipes (other than parts of machines, engines or sanitary installations); Metal pipes for building purposes; Metal water fittings incorporating flow control (parts for water pipes); Pipes of metal; Pre-insulated bonded metal pipes (other than parts of machines or for sanitary installations); Pre-insulated bonded metal pipes for water; Water pipes of metal