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1、DIFFERENCESBETWEENIEC61511ANDISA84.01-1996AngelaE.Summers,P.E.,PhDPresident,SIS-TECHSolutions,LLC12621Featherwood,Suite120Houston,Texas77034KEYWORDSStandards,SafetyInstrumentedFunction,Validation,VerificationABSTRACTTheinternationalstandardIEC61511willbereleasedinitsentiretyasafinalst
2、andardthisyear.TheISASP84committeehasvotedtoacceptIEC61511asANSI/ISA84.01-2003.Ithasalsobegunworkonaguidancedocument,concerningtransitiontoandimplementationofIEC61511intheUnitedStates.TheauthorofthispaperistheTaskTeamLeaderforthisguidancedocument.AlthoughIEC61511usesalifecycleconcept,
3、itisnomirrorimageofISA84.01-1996.Aninternationalstandardmustharmonizethestandardsofmanycountries.Consequently,thestandardwilladdnewrequirementsformanagementoffunctionalsafety,componentselection,design,pre-startupsafetyreviews,operationandmaintenance,andauditing.Thispaperwillnotpresent
4、anoverviewoftheIEC61511standard.Rather,thispaperwillfocusonthemostsignificantdifferencesbetweenIEC61511andISA84.01-1996,highlightingwhatendusersneedtoconsiderinmigratingtheircurrentISA84.01-1996programsintoIEC61511programs.LIFECYCLEDIFFERENCESCopyright2003byISA–TheInstrumentation,Syst
5、emsandAutomationSociety.PresentedatISAExpo2003;www.isa.orgIntheUnitedStates,manycompaniesmustadheretoOSHA1910.119,ProcessSafetyManagement(PSM)forHighlyHazardousChemicals.TheISASP84committeecreatedtheISA84.01-1996standardtosupplementPSMintheareasrelatedtotheimplementationofinstrumentat
6、ionandcontrolsnecessaryforsafeoperation.RatherthanrepeatingPSMmandates,thestandardreferencesOSHA1910forsomekeyPSMprogramelements.Specifically,ISA84.01-1996doesnotcoversafetymanagement,hazardanalysis,pre-start-upsafetyreview,ortraining.ManyothercountriesdonothavearegulationsimilartoOSH
7、A1910.Therefore,IEC61511includesspecificrequirementsintheareasofsafetymanagement,hazardanalysis,pre-start-upsafetyreview,andtraining.Theinclusionoftheserequirementsensuresthatacompletesafetymanagementsystem,asrequiredintheUnitedStates,isimplementedworldwide.Therequirementswillbediscus
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