The installation of all necessary systems, valves and measuring devices required for system management should be as straightforward as possible. However a compromise between ensuring optimum operation and maintenance and the constraints of space limitations is often inevitable. Normally all that is required to identify potential hazards is some common sense. However, the risk assessment which is a requirement for operation also provides notes on safe operation. The operator can request the plant engineer to do this, especially prior to acceptance of the system, to ensure smooth operation of the system.