| Subject | English | Catalan |
| environ. | gas pipeline A long pipe, especially underground, used to transport gas over long distances | gasoducte |
| environ. | oil pipeline A line of pipe connected to valves and other control devices, for conducting oil | oleoducte |
| environ. | transportation by pipeline Transportation of gases, liquids or slurries by a system of tubes, of steel or plastics. Petroleum, natural gas and products derived from them are the main substances transported by pipelines | transport per oleoducte, gasoducte, etc. |