Shouldered End Coupling Connection

[charlesdearden]

I am building a Poly spec and having troubles with using two types of stub ends in my spec.

I have a stub end for flanged pipe connection (pipe - stub end - backing ring - gasket - backing ring - stub end - pipe) that works fine.

Now I have added a shouldered end for a shouldered end coupling connection (pipe - stub end - coupling - stub end - pipe)

To do this I have added a new 'end code' - SCPL and used that end code for port 1 of the stub end (shouldered end)

This is also the end code for each port on the coupling.

The new piping connection is as follows -

end 1 - PL, SCPL

end 2 - SCPL

fasteners - Stub End

Req'd match - Nom. DIA

This connection works fine and brings in the shouldered ends fine when inserting the coupling, but when I have both stub ends in the spec, plant3d fails to tell the difference between the shouldered connection and stub end connection.

The screenshots show the successful flanged connection with a failed coupling connection and vise versa.

What am I missing here?

Thanks