Process 3D Cad systems, such as Autodesk / Bentley / Microstation create the typical .dwg / .dgn files. These systems typically include the Alias supplied ISOGEN tool to dump thinks like piping Isometrics's from the 3D model. The ISOGEN tool also creates .idf / .pcf text files which are then used by pipe fabricators for spool design (SPOOLGEN) and by constructors to build the plant / refinery.
The .PCF file is essentlally a english like text file with each component (flange, weld, valve etc.) being identified by a 3D coordinate, part number and other important information. The file specifications for .idf and .pcf are supported by Alias are are usually standard output of the major 3D Cadd systems. The file specs are published by Alias and freely available.
However, my company does not use Microstation and I have .dgn files to deal with on a large project. We use these files to render the plant in a 3D modeling tool used by constructors in the field to review the plant design / integrate data from other construction support systems and create work packages etc. the CAD deliverables are a whole lot more than just the printed ISO or pretty 3D picture. The .PCF files have valuable data in them, if I can get to them.
In the project I am working on, our engineering partner can produce .pcf files in a limited fashion. Their current CAD system does not produce all of the information we typically need and upgrading to the latest and greatest version of the CAD tool is not an option during the project.
