Northwest Pipeline is a natural gas pipeline network which takes gas from western Canada and the Rocky Mountains via the Westcoast Pipeline and brings it into California , either through Gas Transmission Northwest or Kern River . A small amount of gas goes through the San Juan Basin to El Paso Natural Gas . It is owned by the Williams Companies . Its FERC code is 37.
8-579: Consisting of over 3,900 miles of bi-directional pipeline with 41 compressor stations , it is capable of a peak capacity of 3.8 million dekatherms per day. Klickitat Public Utility District sells landfill gas to Puget Sound Energy that is transported through the Northwest Pipeline. Northwest Pipeline gathers from the Rockies and Canada. Its primary market is the Northwestern states. Its biggest market
16-439: A pipeline route. The size of the station and the number of compressors (pumps) varies, based on the diameter of the pipe and the volume of gas to be moved. Nevertheless, the basic components of a station are similar. Natural gas may move through a pipeline system typically at speeds of up to 25 mph (11.2 m/s), depending on pressures and pipeline diameters. For a pipeline system operating at a nominal pressure of 1000 psi (such as
24-456: A pipeline the gas pressure gradually decreases due to frictional effects and needs to be periodically repressurized at intervals of about 40 to 100 miles (64 to 161 km). Siting of compressor stations is dependent on terrain, accessibility and whether there are other tie-ins such as gas wells in the vicinity. Frequent elevation changes and a greater number of gas wells will require more compressor stations. The compressor station, also called
32-422: A pumping station, is the "engine" that powers a long-distance gas pipelines. As the name suggests, the station compresses the gas (increasing its pressure) thereby providing additional energy to move it through the pipeline. The compressor is driven by an electric motor or an engine fueled by some of the natural gas bled from the pipeline or liquid fuel such as diesel. Companies install compressor stations along
40-459: Is the greater Seattle area. This article about pipeline transport is a stub . You can help Misplaced Pages by expanding it . Compressor station A compressor station is a facility which helps the movement of gas from one location to another in a pipeline system. Gases typically transported over long distances in this way include natural gas , methane , ethylene , hydrogen , ammonia and carbon dioxide . While being transported through
48-508: The UK National Transmission System ) compressor stations compress the gas from about 48 bar (700 psi) to 65 bar (950 psi). Compressor stations generally operate at a pressure ratio of 1:1.4. During compression the gas may increase in temperature from 5 °C (41°F) to 45 °C (113°F). Limiting the pressure ratio ensures that the temperature rise across the compressors is not high enough to require after-coolers to prevent damage to
56-416: The pipeline protective coatings. As the pipeline enters the compressor station the gas passes through scrubbers, strainers or filter separators. These are vessels designed to remove any free liquids or solid particles from the gas before it enters the compressors. Though the pipeline is carrying “dry gas,” some water and hydrocarbon liquids may condense out of the gas stream as the gas cools and moves through
64-405: The pipeline. Any liquids that may be produced are collected and stored for sale or disposal. A piping system directs the gas from the separators to the gas compressor for compression. There are three commonly used types of engines that drive the compressors and are known as "prime movers": As the pipeline enters the compressor station a pig receiver may be installed to receive pigs sent down
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