Answer:

Please see AutoPIPE Vessel help for information on exporting drawings.
Following are the important information for drawing extractions in AutoPIPE Velssel:

• 2D and 3D Drawings can be automatically created:

- DWG -  *.DWG

- Microstation - *.DGN

- AutoCAD / BricsCAD (Classical version) -  *.DWG ...... (Note: AutoPIPE Vessel does not support Lite versions)

- SolidWorks - *.SLDPRT (3D only)

• Users do not need AutoCAD/BricsCAD license anymore to generate .dwg drawing files after version 45.00.00.133 (except Solidworks for 3D).
  To generate the drawings without the AutoCAD/BricsCAD software then choose DWG option in CAD software.
  
  
• User can choose MicroStation option in Preferences to create the DGN format and can be opened in Bentley View Software for free.
• If you have AutoCAD/BricsCAD/Solidworks software then you must select a Cad Software from the Preference dialog and enter the executable path.
• After using the "Execute > Generate Drawing" command; AutoPIPE Vessel will export a formatted file, automatically start the cad software using the path specified, and then open the respective file just exported. If no software is specified, then navigate to the folder containing the AutoPIPE Vessel model, search for a *.DGN drawing file, and use other applications to manipulate the file as needed.  

Refer below video explaining the steps to generate the drawings,

If there is a need to export a different file type or add to the dropdown listings of compatible applications that are currently available, please post an IDEA, instructions here.