Tubes are pipes for transporting liquids and gases. In passenger cars, the spectrum ranges from the air intake hose, the cooling water and fuel hoses to the brake hoses. Hose assemblies are hoses fitted with connectors. They are versatile due to their high bendability and are less susceptible to damage due to high loads or strong vibrations. In the case of hoses and pipes, the selection of the materials varies with the application of the mechanical, chemical or thermal load. Tubes are elongated hollow bodies with a circular cross-section and increased stiffness. They are used, for example, as semi-finished products, static elements of lattice frames and pipes for solid, liquid and gaseous substances. Pipelines are made up of individual standard pipes, Expansion joints, connecting elements, seals and pumps and can be connected to large networks. Tube classes can be determined via nominal pressure stages, as well as flange and seal designs.