Note
	An up-to-date CNS classification has to be installed. If you are not quite sure, please check the state in PARTadmin.

The class CNSPIPECONNECTOR_ROUND refers to the single pipe's openings. So there can be multiple instances per part, which then could have completely different data (diameter, type, etc.).

The class CNSPIPING concerns the entire model and is only available once per part.