功能安全概述-Functional Safety overview.ppt

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1、00FunctionalsafetyEngineering–FSMOverviewHighIntegritycanmeandifferentthingstodifferentpeoplebutitisofcriticalimportanceinmostofourkeymarkets.Onethingiscommonacrossourclients..theyallwanttheirprocesstoreactinacontrolledmannerincriticalconditionsandreducerisktopeople,theenvironment,andbus

2、iness.IntrotoFunctionalSafetyRiskinourworldSafety–thehottopicDisastersthatmustnotberepeated!HighIntegritycanmeandifferentthingstodifferentpeoplebutitisofcriticalimportanceinmostofourkeymarkets.Onethingiscommonacrossourclients..theyallwanttheirprocesstoreactinacontrolledmannerincriticalco

3、nditionsandreducerisktopeople,theenvironment,andbusiness.WhatishighintegrityAutomation“Functionalsafety”PartoftheoverallsafetyrelatingtotheEUCandtheEUCcontrolsystemwhichdependsonthecorrectfunctioningoftheE/E/PEsafety-relatedsystems,othertechnologysafety-relatedsystemsandexternalriskreduc

4、tionfacilities(IEC61508,part4)Theabilityofasafety-relatedsystemtocarryouttheactionsnecessarytoachieveasafestatefortheequipmentundercontrolortomaintainasafestatefortheequipmentundercontrol{Comparewithsafety:Freedomfromunacceptableriskofharm.}ToreduceRiskandtoprotectPeople,EnvironmentandBu

5、siness!RISK:-Acombinationoftheprobabilityofoccurrenceofharmandtheseverityofthatharm.ExxonValdezaccidentinMarch1988LiquidgastankinMexicoCityexplodes;334die-1984Whydowehavesafetystandards?Whydowehavesafetystandards?FromIEC61508Safetyinstrumentedsystemshavebeenusedformanyyearstoperformsafet

6、yinstrumentedfunctionsintheprocessindustries.Ifinstrumentationistobeeffectivelyusedforsafetyinstrumentedfunctions,itisessentialthatthisinstrumentationachievescertainminimumstandardsandperformancelevels.SAFETY:-FreedomfromunacceptableRisk!Increasedfocusonsafety,liabilitiesandstandardsIEC6

7、1508–“Goodpractice”benchmarkforHSEIncreasedproductionateverlowercosts.PushingproductionandequipmenttotheirlimitsReducemaintenancetime-supplychainpressuresFlexible–“quick-change”processesPersonneltrainingissuesDwindlingtechnicalcompetenceIncreaseinhazardousmaterialsWhythef