Have you ever asked how are various liquids transferred to a ship at a port? In main ports which are the hub of transportation like Dubai, normally the liquid cargo reach at the terminal via pipelines. Ok, but how about transferring oil, Diesel Oil, Fuel Oil, etc. loaded in a ship?? Are we using various pipes for each?!
The answer is a part of Oil Transportation Industry named: Pigs.
They are separating various liquids in a pipeline as they move along the pipes. Before pigs, the pipeline itself is a miracle of industry.
Pipelines are systems of connected tubing used to transport goods and materials such as sewage and water, natural gas, biofuels, and liquid petroleum. Pipelines are installed throughout the country, and they vary by the goods transported by the size of the pipes and the material used to make pipes. The US and Canada comprise a vast network of inter- and intrastate pipelines. More than 840,000 km of pipelines run through Canada as part of a broader oil and gas segment that employs between 100,000 and 200,000 Canadians.
It is easy to guess the pipelines are like roads in transportation or veins across the body of economy in different parts of the world.