In this page you will know if the Basic Process Control System (BPCS) cannot protect an equipment from overpressure, how a SIS (Safety Instrumented System) or ANSI /ISA 61511-1-2018 and Layers Of Protection Analysis (LOPA) are collectively used to do the job. You will see how the redundancy of an instrument is used to ensure the availability of an action such as closure or opening of a valve. You will also know how a Safety Integrity Level (SIL) and Probability of Failure on Demand (PFD), common mode failures are determined. Finally, you must be aware that the use of SIS to protect an equipment from an overpressure scenario is the user’s responsibility.
To know details about SIS, please contact Dilip K Das at 1(816)400-3238 or email to dilipkdas@gmail.com.