Plant Design Systems (PDS)is one of great engineering software that you can use to model 3-D.It use for oil and gas project.
PDS designed by Intergraph.
PDS provided solutions in areas like:
- Piping Modeling
- Equipment Modeling
- Electrical and HVAC Modeling
- Reporting Tools
- Drawing Module
- Geometry algorithms
- Graphic File Standards
- MicroStation APIs and design and cell file formats
- Design of Applications using graphic CAD engines and databases in tandem.
More details of this software, you can check out here
http://www.intergraphconsulting.com