A pipeline is a system of pipes for long-distance transportation of a liquid or gas, typically to a market area for consumption. The latest data from 2014 gives a total of slightly less than 2,175,000 miles (3,500,000 km) of pipeline in 120 countries around the world. The United States had 65%, Russia had 8%, and Canada had 3%, thus 76% of all pipeline were in these three countries. The main attribute to pollution from pipelines is caused by corrosion and leakage
HDPE pipelines on a mine site in Australia
A "Pig" launcher/receiver, on the natural gas pipeline in Switzerland
An elevated section of the Alaska Pipeline
Gas pipe in the dry region of Antofagasta, Chile
A pipe is a tubular section or hollow cylinder, usually but not necessarily of circular cross-section, used mainly to convey substances which can flow — liquids and gases (fluids), slurries, powders and masses of small solids. It can also be used for structural applications; hollow pipe is far stiffer per unit weight than solid members.
Drain pipe of the Louvre
Pipe installation on a street in Belo Horizonte, Brazil
Historic water mains from Philadelphia included wooden pipes
Carbon Steel Pipe in a storage yard