4
Carburants; Petroleum; Natural gas
6
Pipes, tubes and hoses, and fittings therefor, including valves, of metal; Manifolds of metal for pipelines; Penstock pipes of metal; Valves of metal, other than parts of machines; Valve assemblies of metal [other than parts of machines]; Tubes of metal; Joint connectors (Metal -) for pipes; Fittings of metal for pipes; Metal hose fittings; Pipe fittings [junctions] of metal; Tanks of metal; Vats of metal; Gas storage tanks of metal; Containers of metal for liquid fuel
7
Oil refining machines; Oil separators; Oil separators [machines]; Agricultural, earthmoving, construction, oil and gas extraction and mining equipment; Oil tanks [vehicle engine parts]; Valves [parts of machines]; Valves; Valves for pumps; Pump control valves; Steam/oil separators; Hydraulic valves; Hydraulic valves [parts of machines]; Fuel valves; Pumps [machines]; Pumps, compressors and blowers; Solar power generators
37
Oil and gas drilling; Drilling and pumping of oil; Extraction of gas; Extraction of oil; Oil pipeline construction; Construction of structures for the storage of natural gas; Construction of structures for the storage of crude oil; Construction of structures for the production of crude oil; Oil drilling; Maintenance and repair of oil and gas storage installations; Construction of oil and gas storage installations; Construction of pipelines; Pipeline installation and repair; Clearing of pipework systems used in the refining industries; Pipeline laying; Installation of gas pipelines; Laying and construction of pipelines; Maintenance and repair of pipelines; Installation of industrial pressure equipment; Installation of industrial piping; Installation of industrial pressure vessels; Repair of pressurised containers; Maintenance and repair of pressure equipment; Mining extraction; Installation of oil pipelines
39
Pipeline transport of gases; Transport of oil; Transportation of oil by pipeline; Transport of natural gas; Transportation of heavy fuel-oil; Oil distribution services; Storage of oil; Information services relating to the transportation of petroleum; Gas supplying [distribution]; Distribution of gas; Gas storage services; Distribution by pipeline and cable; Freight forwarding; Transport
40
Refining of oil; Processing of oil; Refining of gas; Treatment of natural gas; Processing of chemicals and petrochemicals
42
Design of pipelines; Pipeline inspection services; Technical design and planning of pipelines for gas, water and waste water; Oil prospecting; Surveying boreholes; Engineering research; Provision of surveys [technical]; Well bore surveying services; Technical survey services; Mining and mineral exploration services; Surveying and exploration services; Geophysical exploration for the oil industry; Geophysical exploration for the mining industry; Geophysical exploration for the gas industry; Exploration of gas and oil; Analysis for oil research; Provision of technical consultancy to the petrochemical industry; Provision of technical consultancy to the oil refining industry; Technological consultancy; Conducting feasibility studies relative to gas exploitation; Conducting feasibility studies relative to gas exploration; Exploration services in the field of the oil, gas and mining industries; Geophysical exploration for the oil, gas and mining industries; Conducting feasibility studies relative to oil field exploitation; Engineering design and consultancy; Technical consultancy services relating to structural engineering; Material testing; Materials testing and evaluation; Engineering services relating to gas transport and supply systems