6
Pipework of metal; Metal ventilation channels; Penstock pipes of metal; Water-pipes of metal; Branching tubes of metal for pipelines; Pipes of metal including those from alloy steel and titanium; Stainless steel; Tubes of stainless steel; Common metals and their alloys including stainless steel; Prefabricated metal buildings; Modular prefabricated steel framing; Aluminium; Aluminium and its alloys; Aluminium moulds; Cast steel; Unwrought steel; Steel alloys; Plated steel; Bright steel tubes; Slabs of metal including those from alloy steel and titanium; Ducts of metal, for central heating installations; Building materials of metal; Shaped metal portions; Roof components of metal; Pillars of metal for building
37
Servicing of pipelines; Installation of pipelines; Pipeline laying; Construction of pipelines; Services for the repair of pipelines; Installation of industrial piping; Installation of pipework systems; Pipeline construction and maintenance; Maintenance and repair of industrial piping; Maintenance and repair of pipeline systems; Installation of plant; Installation of conveyors; Installation of industrial plant; Polishing (cleaning); Installation of industrial fire protection; Installation of fire detection systems; Maintenance of fire alarm installations; Pipeline installation and repair; Installation of pipe systems for conducting of liquids; Installation of oil refineries; Installation of fabricated construction units; Insulation of pipes; Installation of electrical and generating machinery
40
Metal treating; Machining parts for others; Applying finish to stainless steel sheets and coils; Custom manufacture of steel construction elements; Metal fabrication and finishing services; Welding services; Treatment of aluminum; Metal finishing; Finishing of surfaces by shot peening; Finishing of surfaces by peen forming; Burnishing by abrasion; French polishing; Polishing of metals; Burnishing services; Abrasive polishing of metal surfaces; Stainless steel polishing services; Processing of metal surfaces by abrasive polishing; Processing of metal surfaces by precision grinding and abrasive polishing; Steel cutting; Heat treatment and coating of steel; Custom manufacture of prefabricated buildings; Energy production; Metal stamping; Blacksmithing; Heat treatment of metals
42
Design of pipelines; Design of industrial machinery; Design of industrial plant