More than 180,000 miles of liquid petroleum pipelines traverse the United States. They connect producing areas to refineries and chemical plants while delivering the products American consumers and businesses need. Pipelines are safe, efficient and, because most are buried, largely unseen. They move crude oil from oil fields on land and offshore to refineries where it is turned into fuels and other products, then from the refineries to terminals where fuels are trucked to retail outlets. Pipelines operate 24 hours a day, seven days a week.