Use the PCAT, the "ASME Add-On Pipe and Fittings Catalog - Metric.pcat" catalogue, as a source of additional schedule components and metric geometry components to add to your piping specifications.
Or
Request a piping specification from Cadgroup. Default specifications for each pipe schedule have been prepared and are available to those that download this catalogue.

For detailed information on this content refer to the enclosed ReadMe file from the below location.

C:\AutoCAD Plant 3D 2020 Content\CPak Common\CADGROUP ASME ADD-ON PIPES  FITTINGS CATALOG - METRIC 2018.bundle\ASME Add-On Pipes and Fittings Catalog - Metric\ASME Add-On Pipes and Fittings Catalog - Metric - ReadMe.pdf

Catalog support folder exists or if downloading can be copied to the following location:

• Windows 7/8/10: C:\AutoCAD Plant 3D 2020 Content\ CPak Common\CADGROUP ASME ADD-ON PIPES & FITTINGS CATALOG - METRIC 2020\

To uninstall this content pack, please go to Control Panel => Programs and Features => select the "CADGROUP ASME ADD-ON PIPES & FITTINGS CATALOG - METRIC 2018" => Uninstall

Additional specifications available include:
NOZZLE CATALOG
AS STEEL CATALOGUE
PVC
HDPE-METRIC
VICTAULIC-METRIC
CABLE LADDER
BEVEL SEAT
DC
H-LINE
HDI-Line
IPS
JOHN PERRY
TRICLAMP

Note: Please migrate the catalog file, if you want to use the same catalogs in the lower versions.