PDMS files are related to special CAD files in Plant Design Management System format.
PDMS file extension - Plant Design Management System file
What is pdms file? How to open pdms files?
File type specification:
The PDMS abbreviation is commonly used for special CAD files for Plant Design Management System.
PDMS is not used as an actual file extension, and "PDMS files" generally use any of the existing CAD formats from their respective programs, such as Solidworks, AutoCAD etc.