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
Transalpine Pipeline It could be used to reverse the southern branch of the Druzhba pipeline to supply Slovakia. In Würmlach, Austria, the Adria-Wien Pipeline (AWP) branches off from the Transalpine Pipeline. It supplies the OMV refinery in Schwechat. Through the proposed Bratislava - Schwechat Pipeline it may supply also Slovakia. In addition to the sea transport, the Pan-European Pipeline, if constructed, will supply the Transalpine Pipeline. The diameter of the trunkline between Trieste and Ingolstadt is . Both sections starting from Ingolstadt are with in diameter. The pipeline has ten pumping stations. The pipeline system includes tank farms in Trieste and Lenting,