AutoCAD P&ID comes with various out of the box pipe lines to use in your P&ID drawings.
However, there are no out of the box pipe lines available that can be used if you wanted to show something like heat or electrical tracing. In order to do this you will need to create a multiple line style via the Project Setup and the project's projSymbolStyle.dwg.
To show this process I have created an Autodesk Screencast video, "How to setup multiple line style for AutoCAD P&ID".
If you follow through the video this will show you how to create the multiple line style to use in a P&ID project.