Pipe to Pipe Draw rappresentation

Dear guys,
i need you for the problem during drawings generation, it's possibile remove the outline rappresentation when i have the pipe to pipe or some half couplings TEE??

Do you mean the line that seems to break the pipe in two?
It depends on the Logical Offline attribute.
In Design you can run the following macro:

var !x coll all TEE WITH (APOS EQ LPOS)
DO !Y VALUES !X
 $!Y
 OFFL ON
ENDDO