This industry comprises establishments primarily engaged in the pipeline transportation of natural gas from processing plants to local distribution systems. This industry includes the storage of natural gas because the storage is usually done by the pipeline establishment and because a pipeline is inherently a network in which all the nodes are interdependent.
Operating oil and gas field gathering lines--are classified in Sector 21, Mining, Quarrying, and Oil and Gas Extraction; and Providing natural gas to the end consumer--are classified in Industry 221210, Natural Gas Distribution.