HSE Q&A (Issue 40: Instrument Safety)
【Question 1】Do SIS and DCS valves need to be set up separately? Can SIL1 and below be shared? 【Answer】1)Refer to “Design Specifications for Safety Instrumented Systems in the Petrochemical Industry” (GB/T 50770-2013): Measurement and actuators are best set up independently. When control valves are shared, it should ensure thatSIS takes priority. 2)Refer to “Acceptance Specifications … Read more