Process area:
- Complex pipework
- Small vessels
- Multitude of sensitive instruments
- Small temperature window
- Typically a lot of maintenance in these areas
- Short circuit lengths
Transfer lines:
- Long circuit lengths required
- from limited power supply points
- Larger temperature window
- Less maintenance-intensive
Storage vessels:
- High power requirements (heat up)
- Less maintenance-intensive
Reactors :
- High temperature resistance capabilities
- High power requirements, usually during start up