受限空间安全

受限空间安全第1页，课件共30页，创作于2023年2月ConfinedSpaceStatisticsLeadingcauseofoccupationalfatalitiesinthiscountryTheStandardcovers240,000workplaces

and12.2millionworkersWorkersmake4.8millionentries/yearStandardmayprevent85%offatalities

andnearly11,000injuries第2页，课件共30页，创作于2023年2月DefinitionofaConfinedSpace

(mustmeetallthreecriteria)Limitedmeansforentryorexit(manholes,vaults,&pits)Largeenough&soconfiguredthatanemployeecanbodilyenterand performassignedworkNotdesigned

forcontinuous

occupancyTwotypes–Permit&Non-PermitRequiredSpaces第3页，课件共30页，创作于2023年2月DefinitionofPermit-Required

ConfinedSpacesAconfinedspacethathasoneormoreofthefollowingcharacteristics:ContainsorhaspotentialtocontainahazardousatmospherePotentialforengulfmentInternalconfigurationthatcantraporasphyxiateentrantAnyotherserioussafetyorhealthhazards(electrical,hotwork,drowning...)第4页，课件共30页，创作于2023年2月WhatisaHazardousAtmosphere?Anatmospherethatmayexposeemployeestotheriskofdeath,incapacitation,impairmentofabilitytoself-rescue,oracuteillnessresultingfromthefollowing:Flammablegas,vaporormistinexcessof10%oftheLFLCombustibledustataconcentrationthatis>or=LFLOxygenconcentration<19.5%or>23.5%Anysubstancewithconcentration>PELAnyotheratmosphericconcentrationthatisIDLH第5页，课件共30页，创作于2023年2月Permit-RequiredSpacesonCampusElectricalvaults:electricalhazards,lowoxygen,&/orasbestosSewermanholes:CO,lowoxygen, &/ortoxicgasesStormdrainmanholes:CO,lowoxygen,&/ortoxicgases第6页，课件共30页，创作于2023年2月Permit-RequiredSpacesonCampus(cont)PoolPit:lackofoxygen,toxicgases,&/ordrowningSewerTanks:toxicgases,lowoxygen, drowning,&/orelectrocutionhazardsCommunicationVaults:low oxygen,asbestos, &/orelectricalhazards第7页，课件共30页，创作于2023年2月Non-PermitRequiredSpacesSpacesthatdonotcontainor,withrespecttoatmospherichazards,havethepotentialtocontainanyhazardcapableofcausingdeathorseriousphysicalharm: Utilityclosets Below-gradetrenches Storagevaults Utilitysubbasements第8页，课件共30页，创作于2023年2月ConfinedSpacesonCampusEH&SandPPMjointlydeterminewhichtypesofspacesorspecificspacesaredefinedasconfinedspacesAllconfinedspacesoncampuswillbeconsidered“PermitRequired”untilpre-entryproceduresdetermineotherwise.OnlytheEntrySupervisorisauthorizedtodowngradeentryrequirements.第9页，课件共30页，创作于2023年2月ConfinedSpaceEntryProceduresSpaceEvaluationAlternateEntryProceduresPermit-RequiredEntryProcedures第10页，课件共30页，创作于2023年2月SpaceEvaluationRefertoFlowChartEntrySupervisormustevaluate&authorizeanentryThiswilldetermineif“AlternateEntry”or“Permit-Required”Ifthespaceisreclassifiedasan“AlternateEntry”thenthefollowingconditionsmustexist:onlyhazardisthepotentialforahazardousatmosphere;andpotentialhazardcanbeeliminatedthroughcontinuedforcedairventilation;andprevious¤tgastestsmustshowabovetwoconditionsaretrue第11页，课件共30页，创作于2023年2月第12页，课件共30页，创作于2023年2月AlternateEntryProcedures

Procedurethatmaybeusedtoenteraconfinedspaceiftheonlyhazardpresentinthespaceisatmosphericinnatureand:Theatmospherichazardcanbecontrolledbymechanicalventilationaloneand;Thepermitspacewillnotbecomeimmediatelydangeroustolifeandhealth(IDLH)ifthemechanicalventilationshouldfail.第13页，课件共30页，创作于2023年2月AlternateEntryProcedures(cont)EntrySupervisorensuresspacehasbeenproperlyclassifiedUseguarding/cover/barriertoprevent falls(whenremovingcover)Lockout/tagoutallhazardous energysourcesCompletelogTestforO2,flammablegases/vaporsandpotentialtoxicaircontaminantsSetupventilation(supplyairtakenfromcleansource)TheEntrantwillevacuatetheconfinedspaceifhe/shebecomesawareofanunrecognizedhazard第14页，课件共30页，创作于2023年2月第15页，课件共30页，创作于2023年2月第16页，课件共30页，创作于2023年2月PermitRequiredEntryProceduresEntrySupervisor,EntryAttendantandEntrantmustparticipateInspectandsetupsafetyequipmentEntrySupervisorestablishesspecificrescueproceduresLockandtagoutallhazardoussourcesofenergyUseguardingIfremovinganentrancecoverSampleandrecordairforhazardouscontaminantsEntrySupervisorcompletesPermitpriortoentry第17页，课件共30页，创作于2023年2月PermitRequiredEntryProcedures(cont)AttendantverifiesacceptableentryconditionsEntrantwearsretrievalequipmentduringentireoperationAttendantcontinuouslymonitorsatmosphere&recordsreadingswiththeportablegasdetectorImmediatelyevacuatespaceifsafetyequipmentfailsorspacebecomesorhaspotentialtobecomeimmediatelyhazardousUponcompletion,EntrySupervisorcompletespermitandfiles第18页，课件共30页，创作于2023年2月PotentialConfined

SpaceHazardsEngulfmentOxygendeficiency(19.5%orless)Oxygenenrichment(23.5%orhigher)FlammablegasesorvaporsCombustibledustsToxicsubstancesIDLHatmospheresPhysicalhazards第19页，课件共30页，创作于2023年2月MonitoringConfinedSpace

AirQualityPriortoenteringanyconfinedspace,preparethegasdetectorConducta“bumptest”.Breatheintothegasdetectorprobeandlookforadecreaseinoxygenconcentration-shouldalarmSampleairqualitybyslightlyremovinglidorthroughholeinlidbeforecompletelyopeningthespaceMonitorwithprobeslowlyatdifferentverticalheightsMeasureinthefollowingorder:Oxygen,LEL,H2S,CORecordresultsontheConfinedSpaceEntryPermitRecordSheet第20页，课件共30页，创作于2023年2月MonitoringConfinedSpace

AirQuality(cont.)ThegasdetectormustbeonduringtheENTIREentryoperationWillberegularlyinspectedbytheAttendant.RecordgasreadingsataminimumofonehourintervalsCeaseentryoperationsandremoveentrypersonnelifthefollowingconcentrationsareexceededatanytime:Oxygenreadinglessthan19.5%orgreaterthan22.5%Combustiblegasreadinggreaterthan9%LELH2Sreadinggreaterthan9ppmCOreadinggreaterthan34ppm第21页，课件共30页，创作于2023年2月VentilatingaConfinedSpaceSetuponeormoreblowersto provideadequateventilationfor thespace.Ventilationmustbe forceddraftdischargeofcleanair intospace(notexhaustofspace)EnsureventilationairsupplyisfromcleansourceAllowenoughtimeforblowerstoclearthespacebeforeentering.Ensurethattheblowersremainonduringtheentireentryprocedure.Iftheblowerfails,theEntrantmustleavethespaceimmediatelyNote:thisappliestoboth“PermitRequired”and“AlternateEntry”procedures第22页，课件共30页，创作于2023年2月TypesofPersonal

ProtectiveEquipmentProtectiveclothingWeldingapron/sleevesRespiratorsGlovesSafetyglasses第23页，课件共30页，创作于2023年2月RetrievalEquipmentRescueharness(chestorfullbody)RescuetripodRopeorcable(inspectfordamage)第24页，课件共30页，创作于2023年2月DepartmentResponsibilitiesEH&SEstablish&updatewrittenprogramprovidetrainingreviewrecords&provideconsultationPPM&CommunicationServicesEnsureallinvolvedemployeesreceivetraining&followproceduresprovideandmaintainequipmentmaintainrecords第25页，课件共30页，创作于2023年2月EntrySupervisorResponsibilitiesEnsureallpersonsinvolvedinaconfinedspaceentryareproperlytrainedEvaluateandclassifytheconfinedspacepriortoentryCompletetheConfinedSpaceEntryPermit(ifrequired)Ensurecanceledpermitsareproperlyfiled第26页，课件共30页，创作于2023年2月EntrantResponsibilitiesCompletedConfinedSpacetrainingMuststayinconstantcontactwiththeAttendant(I.e.sight,voice,orradio)duringaPermitRequiredConfinedSpaceentryUsetheappropriatesafetyequipmentasspecifiedontheEntryPermit第27页，课件共30页，创作于2023年2月EntryAttendantResponsibilitiesCompletedConfinedSpaceTrainingObtain&installrequiredsafetyequipmentforPermitRequiredConfinedSpaceentriesMonitorpedestrianbarrierstoprotectentrant(s)fromexternalhazardsMonitortheatmosphereduringtheentireentryoperationMustremaininpositionuntilrelievedbyanothertrainedAttendantEnsurealllockout/tagoutmeasures(ifimplemented)remaininplaceResponsiblefororderinganevacuationifasituationdevelopsthatcouldendangertheEntrant第28页，