It's not clear what you are trying to achieve.
A large sewage works will have different sections - but completely different from a Newspaper printing works (with re-cycle facility).
The only way you will truly appreciate how plant is connected is to visit a site and be shown round - some sites I have been involved in have school trips late spring/early summer.
I understand the latter is for you to configure your own process modelling prior to build.
"Tecnomatix Plant Simulation is a discrete event simulation tool that helps you to create digital models of logistic systems (e.g., production), so that you can explore the systems' characteristics and optimize its performance".