I looked into this further. SPR 1194232 led to an update in Creo Parametric's Help Center.
A part created in the piping module is not recognized as a "PIPE" part type in the same way as Sheetmetal, Skeleton, Harness, etc. will be. This condition setting value is intended to look for pipe features in a part, not for a pipe model type.
Document CS102512 should have indicated that the Help Center was updated to clarify the PART_PIPE value in the following sections:
Both sections contain the note: "PRT_PIPE is not for piping systems created using the Piping module but only for models that contain pipe features." The note was added to Creo Parametric 2.0 so if you're using the Pro/ENGINEER Help Center you will not see the changes.
I'll rework CS102512 because it is currently unclear. If this doesn't explain what you're seeing, I recommend you open a case with Technical Support.