You mean jacketed piping? No, there is no functionality for that and there never will be in PDMS; all new development goes into E3D. 12.1 sp2 hasn't been supported for a number of years.
Nope, there is no such functionality in E3D either, sorry I wasn't clear. I think you should talk to your Aveva account manager or support office and let them know this is something that people need.
There is also no functionality to add a 3D view to the isometric. Some people write their own PML to create a plot file of the pipe using Draw, but that is something you will have to do yourself.
As of now there is no such functionality in PDMS / E3D.
You can discuss with your AVEVA account manager for support in such cases. (You can add this in your wishlist as well ;))