These parts are available in the Routing Library.
Each pipe and tube part can have configurations with different dimensions and properties. For example, pipe with a certain diameter could have multiple configurations with different lengths and thicknesses. A connection point
(CPoint) might specify pipe of that diameter, but the Routing application allows you to select other configurations.
Electrical route parts include wires, standard cables and ribbon cables. These parts can have a number of parameters, including external diameter, size of the core, color, and minimum bend radius. They are available in the Cable/Wire Library.
User defined parts can have many configurations with different dimensions and properties. For example, a rectangular user defined route can have multiple configurations with different widths, heights, thicknesses and lengths. A connection point (CPoint) might specify a route section with specific dimensions, but the Routing application allows you to select other configurations. 
After you create a route, parts for pipe, tube, electrical, and user defined routes are listed in the Route Parts 
folder of the assembly’s FeatureManager design tree.