Fault Safety Setting of Safety Instrumented System
With the scale and automation of chemical production process,the role of safety instrumented system(SIS)in safety production is becoming more prominent.It is particularly important to improve the safety integrity and system availability of SIS.Firstly,the definition of fault safety type in SIS is analyzed to determine the safety status of SIS in case of faults.Then the failure modes of different types of measuring instruments are analyzed,dangerous failure and safe failure states are identified,and the fault safety settings of the measuring instruments are determined.The fault safety configuration of the logic controller and the safe position of the final component are briefly analyzed,specific implementation methods are provided for the complete fault safety configuration of the SIF loop.The fault safety setting of the instrument requires careful review at every stage of design,manufacturing,construction,and commissioning in order to deliver engineering projects meeting safety requirements.
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