AOPL: Association of Oil Pipe Lines, an industry trade group.
API: American Petroleum Institute, an industry trade group.
Barrel: 42 U.S. gallons.
Batch: A quantity of petroleum product of similar specification that is moved as an identifiable unit through the pipeline.
Booster Station: A pump station used to increase the pressure of oil received through a main pipeline to transmit it to the next station or terminal.
Cold Zone: Area safe for necessary personnel.
Common Carrier: Any transportation system available for use by the public for transporting cargo; almost all interstate pipelines are common carriers.
Crude Oil: The basic raw mineral pumped from the earth. There are many different grades of crude, each containing various vapors, liquids and solids. This crude is changed at a refinery into products.
Easement: An interest in land owned by another that entitles its holder to a specific limited use.
Geographic Information System: A computer-based system that captures, stores, edits, displays, plots, and analyzes geographically referenced information.
High Consequence Area: Population center or environmentally sensitive area.
High Pressure Pipelines: Pipe systems which operate at 600 psi to 2000 psi and higher.
Hot Zone: Area where hazardous vapors and liquids are present.
Interface: The mixture which occurs in normal pipeline operations between batches of petroleum products having different specifications. Also known as "transmix."
Line Section: A continuous run of pipe between locations.
Manifold: An arrangement of piping valves to provide interconnecting links between a number of pumps, tanks, and lines at a pump station.
Pig: A device placed inside a pipeline that is used to clean or scrape residues from the inner wall of the pipe.
Pipeline System: All parts of the physical facilities through which commodities move, including line pipe, valves, pumping units, metering stations and tankage.
Products: Refined substances made from crude oil. Gasoline, fuel oil, butane and a host of various other petroleum products that we transport in pipelines.
Right-of-Way: A strip of land on which permission has been granted by landowners for the construction/maintenance of a pipeline.
Smart Pig: A device placed inside the pipeline to provide data about the pipeline, such as measuring dents or locating corrosion.
Tank Farm: A group of tanks connected to a pipeline through which oil is moved.