There really isn't an industry standard, but the Autodesk Fabrication products are established products so it is rare to find a pattern that cannot be used for an MEP fitting. If you do have a request for a new pattern then please submit the request along with supporting information like a sketch or specification sheet of the fitting to this community. We monitor the community for requests and consider them for future development. The votes (Kudos) helps to escalate the request.

Brett Stacks
Product Manager, MEP Fabrication
Autodesk, Inc.