Common metals and their alloys; steel alloys; stainless steels, titanium and titanium alloys; nickel and nickel alloys; copper and copper alloys; metallic pipes and tubes of steel; metallic pipes and tubes of stainless steel; metallic pipes and tubes of titanium and titanium alloys; metallic pipes and tubes of nickel and nickel alloys; metallic pipes and tubes of copper and copper alloys; metallic finned pipes and tubes; corrugated metallic pipes and tubes; metallic pipes and tubes with helical deformation; metallic round pipes and tubes; metallic flat pipes and tubes; metallic square pipes and tubes; metallic oval pipes and tubes

Metal tubes for industrial air dryers being parts of machines; metal tubes for industrial seawater desalination units being parts of machines; metal tubes for evaporator being parts of machines; metal tubes for liquid coolers being parts of machines, namely, for oil coolers for engines; steam engine boiler heating tubes being parts of machines; tubes for vacuum distillation apparatus being parts of machines; air-cooled condensers and metal tubes for air-cooled condensers being parts of machines; heat exchangers being parts of machines and metal tubes for heat exchangers being parts of machines; oil-water separators for pneumatic controls being part of machines and metal tubes for water separators being parts of machines; exhausts for motors and engines; exhaust metal intake tubes for engines; tubes for recycling of flue gases for engines boilers; metal tubes for engine cooling systems; exhaust gas recirculation systems for internal combustion engines comprised primarily of coolers, exhaust air flow vane assemblies, and emission reduction units; selective catalytic reduction systems for internal combustion engines comprised primarily of ammonia flow control units, ammonia injection manifolds, ammonia injection grids, transition ducting, external and interconnection piping, catalysts, and storage tanks, all sold as a unit; metal tubes and pipes for selective catalytic reduction systems, being machine parts for catalytic converters

Metal tubes being parts for air-conditioning installations; metal tubes for drying installations; metal tubes for sea water desalination installations; metal tubes for water purification installations; metal tubes for liquid evaporation installations; metal tubes for liquid cooling installations; tubes, namely, heat exchanger tubes, for thermal power plants and for nuclear power plants; metal tubes for distillation installations; metal tubes for heating installations for vehicles; metal tubes for air cooling installations for vehicles; metal tubes for installations for heating water in swimming pools; boiler pipes tubes for heating installations; tubes for steam generating installations, tubes for refrigeration installations, metal tubes being parts for ventilation installations; metal tubes for water distribution installations; metal tubes for sanitary installations; refractory furnace heating tubes; heating tubes for heating boilers; heat exchangers, other than parts of machines; gas condensers, other than parts of machines; electrochemical gas generators; liquid cooling installations for water, air, and refrigerant; air re-heaters, other than parts of machines; water heaters; refrigerating apparatus and installations; drying apparatus and installations for use in heating, ventilation systems, air conditioning systems and refrigeration systems; heaters for vehicles; air conditioners for vehicles

Advice and information relating to installation and maintenance of tubes and pipes; rental of construction equipment; machinery installation, maintenance and repair; repair information on tubes and pipes