Open a P&ID (process and instrumentation diagram) when you need to create a 3D model in Revit.
In Revit, open the model that corresponds to the P&ID you want to model.
P&ID Collaboration panel
P&ID Modeler. In the P&ID Modeler palette, you can also click Start Modeling.
The preview pane of the P&ID Modeler palette displays the drawings in the project.
A preview of the drawing displays in the top pane. A list of pipe lines displays in the bottom pane.
Video: Sharing a P&ID with Revit