Pipeline transport is the transportation of goods through a pipe. Most commonly, liquids and gases are sent. but pneumatic tubes using compressed air can also transport solid capsules. As for gases and liquids, any chemically stable substance can be sent through a pipeline. Therefore sewage, slurry, water, or even beer pipelines exist: but g crude petroleum and refined arguably the most valuable are those transporting crude petroleum and refined petroleum products including fuels:oil (oleoduct),natural gas (gas grid),and biofuels