3.05.01 Steel/Piping/Mechanical Services
3.05.02 Electrical/Instrument Services
3.05.03 Ventilation/Heating/Sanitary Services
3.05.04 Waste Disposal/Drainage Services
3.05.05 Insulation Services
3.05.06 Surface Treatment, Sandblasting, Painting, Coating and Fireproofing Services
3.05.07 Scaffolding/Rigging/Covering Services
3.05.08 Civil Works/Building Contracting Services including Drilling/Tunnelling
3.05.09 Diving/ROV/Submersible operations
3.05.10 Subsea Construction Services
3.05.11 Diesel Aggregates/Generators Services
3.05.12 Pipe Cutting and Pipe Bending Services
3.05.13 Industrial Cleaning Services
3.05.14 Catalyst Handling/Regeneration Services
3.05.15 Bolt Tensioning Services
3.05.16 Rope Access Services
3.05.17 Welding and Jointing Services
3.05.18 Safety/Protection/Security/Firefighting System Services
3.05.19 Preservation of Mechanical and Electrical Components Services
3.05.20 Maintenance/Modification of Pumps and Rotating Equipment
3.05.21 Heat Treating and Demagnetising Services
3.05.22 Vehicle Maintenance and Repair Services
3.05.23 Machining Services (in situ and general machining)
3.05.24 Site Clean-up Services
3.05.25 Biological Sludge Treatment Services
3.05.26 Tank Bottom Sludge Treatment Services
3.05.27 Piling Services
3.05.30 Valve Management Services including testing and repair
3.05.31 Crane Management Services
3.05.99 Other Construction/Maintenance Services