6
Common metals and their alloys; Steel alloys; Stainless steel, Titanium and Titanium alloy; Nickel and Alloys of nickel; Copper and copper alloys; Pipes and tubes of metal, of steel; Pipes and tubes of metal, of stainless steel; Pipes and tubes of metal, of titanium and titanium alloys; Pipes and tubes of metal, of nickel and nickel alloys; Pipes and tubes of metal, of copper and copper alloys; Finned pipes and tubes of metal; Corrugated pipes and tubes of metal; Pipes and tubes of metal with helical deformations; Round pipes and tubes of metal; Flat pipes and tubes of metal; Squared pipes and tubes of metal; Oval pipes and tubes of metal
7
Pipes and tubes for air dryers (parts of machines); Pipes and tubes for desalination plants (parts of machines); Pipes and tubes for water purifiers (parts of machines); Pipes and tubes for evaporators (parts of machines); Pipes and tubes for liquid coolers (parts of machines); Pipes and tubes for boilers (parts of machines); Pipes and tubes for nuclear reactors (parts of machines); Pipes and tubes for distilling apparatus (parts of machines); Aerocondensers and pipes and tubes for aerocondensers (parts of machines); Condensing installations; Condensers (parts of machines) and pipes and tubes for condensers (parts of machines); Water heaters (parts of machines) and pipes and tubes for water heaters (parts of machines); Heat exchangers (parts of machines) and pipes and tubes for heat exchangers (parts of machines); Water separators and pipes and tubes for water separators (parts of machines); Silencers for motors and engines; Pipes and tubes for exhausts for motors and engines; Pipes and tubes for recycling burned gases; Pipes and tubes for cooling systems for motors and engines; Exhaust gas recirculation (EGR) systems; SCR systems; Pipes and tubes for SCR systems
11
Pipes and tubes for air-conditioning installations; Pipes and tubes for drying installations; Pipes and tubes for desalination plants; Pipes and tubes for water purification installations; Pipes and tubes for liquid evaporation plants; Pipes and tubes for liquid cooling installations; Pipes and tubes for heating plants and for nuclear power plants; Pipes and tubes for distillation installations; Pipes and tubes for heating installations for vehicles; Pipes and tubes for air conditioning installations for vehicles; Pipes and tubes for installations for heating water in swimming pools; Boiler pipes [tubes] for heating installations; Pipes and tubes for steam generating installations, pipes and tubes for refrigeration installations, pipes and tubes for ventilation installations; Pipes and tubes for water supply installations; Pipes and tubes for sanitary installations; Refractory tubes; Boiler pipes; Heat exchangers, not parts of machines; Gas condensers; Installations for evaporating; Gas generators (installations); Cooling installations for liquids; Air heating apparatus; Booster water heaters; Refrigerating appliances and installations; Drying apparatus and installations; Heaters for vehicles; Air conditioners for vehicles
37
Construction; Information and consultancy relating to construction; Consultancy and information relating to the installation and maintenance of pipes and tubes; Hire of building machinery; Machinery installation, maintenance and repair; Repair information