Chapter 14

Safety instrumentation

Modern process facilities are highly instrumented. The instruments are used to monitor on-going process conditions, provide information to the operating technicians, adjust operating variables, and take corrective action should process conditions move outside the safe range through the use of alarms, interlocks, and trips will all bring the system back to a safe state. This chapter provides an overview of instrumentation and its role in ensuring safety.


Safety instrumented systems; SIS; Safety integrity level; SIL; HIPPS; SIL; High integrity pressure protection system; HIPPS; Alarms; Emergency shutdown

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