Queries in pdms 12.1 sp2, 'pipe in pipe' double piping

Any update regarding 'pipe in pipe'/double pipe modelling and its isometric generation from aveva???

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.

Yes i mean in E3D any option developed? also, can a 3d iso view of pipe and equipment  be shown in piping isometric?

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.

Jacketed Piping we need separate catalogue

@mno.:oK.
@deva:-how seperate catalogues will help in modelling of pipe in pipe. how can these be made for jacketed piping.

You have probably read this already...

https://www.avevaworldforum.com/showthread.php?11556-Jacketed-piping

You need a catalogue with "special" components (i.e. jumpers) to model the outside pipe

yes, but why dont aveva provide specific solution  for pipe in pipe modelling.?

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 ;))