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Pipeline Terms

AGA: American Gas Association.


APGA: American Public Gas Association.


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.


Compressor Station: A facility that increases the pressure of a gas to move it through a pipeline system.


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.


Cubic foot: Most common unit of measurement for gas volume.


Easement: An interest in land owned by another that entitles its holder to a specific limited use.


Gas: Natural gas, flammable gas, or gas which is toxic or corrosive.


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.


INGAA: Interstate Natural Gas Association of America. 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 and valves to provide interconnecting links between a number of pumps or compressors, tanks or pressure vessels, and lines at a pipeline facility.


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 or compressor units, metering stations and tankage, storage caverns or pressure vessels.


Products: Refined substances made from crude oil. Gasoline, fuel oil, butane and a host of various other petroleum products that we transport in pipelines.


Pump Station: A facility that increases the pressure of a hazardous liquid to move it through a pipeline system. 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 hazardous liquids are moved.