Pipeline transport are usually buried. The oil is moved through the pipelines by pump stations along the pipeline. Natural gas (and similar gaseous fuels) are lightly pressurised into liquids known as Natural Gas Liquids (NGLs). Natural gas pipelines are constructed of carbon steel. Hydrogen pipeline transport is the transportation of hydrogen through a pipe. Pipelines conveying flammable or explosive material, such as natural gas or oil, pose special safety concerns and there have been various accidents. Pipelines can be the target of theft, vandalism, sabotage, or even terrorist attacks. In war, pipelines are often the target of military attacks. It is uncertain
Central Europe Pipeline System out against a part of the pipeline in Southern-Germany by Red Army Faction sympathisers. At the end of the Cold War the system was significantly reduced as various military airports that used the system were closed, such as Bitburg Air Base and Soesterberg Air Base. However, in some other places expansion of the pipeline continued and in October 2008 construction of of additional pipeline was completed between Aalen and Leipheim. Since 1959, excess capacity of the pipeline may be used by civilian users. Currently, around 90% of the fuel transported through the system is for civilian users, customers including various