"Over the past 70 plus years, a nationwide system of pipelines has been constructed to transport almost 100 percent of the natural gas and about 71 percent of the oil and refined petroleum products consumed in the United States. Three industry segments are involved in transporting these energy materials by pipelines: hazardous liquid pipeline operators, gas transmission pipeline operators and gas distribution utilities. The first two industry segments transport energy materials from producers, refiners, and processors to industrial and commercial end users, as well as to terminals and to local gas distribution utilities. Local gas utilities distribute natural gas to residential customers and smaller commercial users. The majority of the materials transported by the hazardous liquid and gas transportation operators are moved via large diameter steel pipelines from wells and refineries to where they are used or distributed further. Approximately 299,000 miles of onshore gas transmission pipelines and 171,000 miles of onshore hazardous liquid pipelines move natural gas, crude oil, and petroleum products throughout the U.S. every day."
Pipeline and Hazardous Materials Safety Administration: https://phmsa.dot.gov/