Oil and gas production handbook An introduction to oil ... - ABB Group

• Warning and escape: PA systems, beacons/lights, fire door and
damper release
A separate package related to fire and gas is the diesel- or electrically-driven
fire water pumps for the sprinkler and deluge ring systems.
For fire detection, coincidence and logic are often used to identify false
alarms. In such schemes, several detectors in the same area are required to
detect a fire condition or gas leakage for automatic reaction. This will include
different detection principles, e.g., a fire, but not welding or lightning strike.
Action is controlled by a fire and
gas system (F&G). Like the ESD
system, F&G action is specified
in a cause and action chart
called the Fire Area Protection
Datasheet. This chart shows all
detectors and fire protection
systems in a fire area and how
the system will operate.
The F&G system often provides
supervisory functions, either in
the F&G or the information
management system (IMS) to
handle such tasks as
maintenance, calibration or
replacement and hot work
permits, e.g., welding. Such
actions may require that one or
more fire and gas detectors or
systems are overridden or
bypassed. Specific work
procedures should be enforced,
such as a placing fire guards on duty, to make sure all devices are reenabled
when the work permit expires or work is complete.
8.1.4 Control and safety configuration
Piping and instrumentation diagrams (P&ID) show the process. Additional
information is needed for the specification of the process control and safety
systems design and their control logic. These include: Loop diagram,
Instrument datasheet, Cable schedule and Termination list.
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