I’m a complete beginner; I just started working after graduating and have entered the environmental protection industry. I’m here to ask the experts about SIL
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If the safety instrumented system SIS has a SIL level of SIL2, what is then the required level for the instruments in this system? Once the SIL level is determined, what are the requirements regarding the selection of appropriate instruments? What are the requirements for control system design? What documents need to be provided? Thank you again to all the experts!
Have you met any seniors who have experience in this area? I truly seek advice
It is recommended to take a look at the GBT 20438.6-2017 standard. In simple terms, the SIL level of a control loop is determined by the sum of the PFD values of its various components. These PFD values, in turn, are influenced by factors such as the hardware architecture, hardware fault tolerance, systemic capabilities, and common-cause failures; as a result, the situation is quite complex. SIL1 is the easiest level to achieve, while higher levels such as SIL2 require detailed analysis and calculations taking into account various constraints.
Which department is responsible for evaluating the SIS rating for safety systems?
There are manufacturers specialized in conducting SIL assessments
I recommend \"Engineering Design and Application of Safety Instrumented Systems\" published by Sinopec Press. Although the translation isn’t particularly good, the content is sufficient to answer your questions.