Derwent Classification System: Petroleum
Comprehensive coverage of all aspects of the oil and gas industry with limited coverage of competitive products e.g. coal and peat.
Approximate IPCs are given in brackets
| H01 | Obtaining crude oil and natural gas - including exploration, drilling, well completion, production and treatment. General off-shore platform and drilling technology is included together with the treatment of tar sands and oil shales (C10G, E21B). |
| H02 | Unit operations - including distillation, sorption and solvent extraction (C10G). |
| H03 | Transportation and storage - only large scale systems are included. Road tankers and retail petrol station-type applications are excluded. Treatment of pollution from marine oil tankers is included. |
| H04 | Petroleum processing - including treating, cracking, reforming, gasoline preparation - biosynthesis based on hydrocarbon feedstocks is included (C10G). |
| H05 | Refinery engineering. |
| H06 | Gaseous and liquid fuels - including pollution control. Chemical aspects of catalytic exhaust systems for cars are included as well as liquid or gaseous fuels of non-petroleum origin eg methanol or ethanol-based fuels. Combustion improvement additives for liquid fuels are included (C10L). |
| H07 | Lubricants and lubrication - this excludes self-lubricating surfaces eg PTFE coated surfaces and lubrication systems in general. The section includes lubricants of non-petroleum origin eg silicone oils (C10M). |
| H08 | Petroleum products, other than fuels and lubricants - this includes hydraulic fluids and electrical oils even when of non-petroleum origin (C10M). |
| H09 | Fuel products not of petroleum origin - excluding coal handling, preparation or mining, but including coking, briquetting, peat processing synthesis, gas production, coal gasification. Combustion improvement additives for coal, peat and other non-hydrocarbon based fuels are included in this Section together with coal liquefaction and desulphurisation. |