I have questions regarding DCS and SIS; please, experts, help answer them.
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I’m a complete beginner and would like to know how the safety level is determined, what factors are taken into account, what the response time of SIS is, and by how much it’s faster than DCS. Is SIS mandatory for all types of factories?
It is commonly used in oil, gas, and chemical plants.
SIS is a safety instrumented system, while DCS is a control system; they are two separate systems, and chemical processing plants generally need to have a SIS system in place. The SIS system operates on a millisecond scale, with SOE history records
You can search for SIL classification on Baidu; it’s SIL, not SIS
Find experts to conduct a HAZOP analysis and determine the safety level; high-risk processes must also be addressed
SIS is a safety instrumented system, while DCS is a control system; they are two separate systems, and chemical processing plants generally need to have a SIS system in place. The SIS system operates on a millisecond scale, with SOE history records