1对经修订的批准指南的修正等效的固定气体灭火系统，如SOLAS74中所述，对于机舱和货油泵舱(MSC/CIRC.)1委员会在其第八十四届会议（年5月7日至16日）上批准了SOLAS74中提到的用于机器处所和货泵舱的等效固定气体灭火系统批准修订指南的修正案(MSC/Circ.)，载于附件。2请成员国政府在批准用于机器处所和货泵舱的等效固定气体灭火系统（如SOLAS74中所述）时应用修订指南的修正案，并提请船舶设计者、船东注意、设备制造商、测试实验室和其他相关方。附件对经修订的批准指南的修正等效的固定气体灭火系统，如SOLAS74中所述，对于机舱和货油泵舱(MSC/CIRC.)1在第1段中，参考“SOLAS第II-2/7和II-2/63条”由参考“SOLAS第II-2/10.4和II-2/10.9”和参考“SOLAS第II-2/5”被引用“FSS规则，第5章”取代。2在第2段中，引用“SOLAS第II-2/5.1、5.3.1、5.3.2至5.3.3”被引用“FSS规则，第5章，第2.1条”取代。3在第3段中，将设计浓度百分比“20%”替换为设计浓度百分比“30%”。4现有第6款由以下内容代替：“6所有系统的设计都应允许在排放前疏散受保护的空间。还应提供装置，用于在灭火剂释放到人员正常工作或可以进入的任何处所时自动发出声音和视觉警告。警报应在疏散空间所需的时间段内运行，但在介质释放前不少于20秒。应避免不必要的接触，即使浓度低于不利影响水平。6.1即使浓度低于不利影响水平，接触气体灭火剂的时间也不应超过5分钟卤化碳灭火剂的使用时间可达到根据受保护空间的最大预期净体积计算的未观察到的不利影响水平(NOAEL)环境温度，无需额外的安全措施。如果要在高于其NOAEL的情况下使用卤化碳制剂，则应提供措施以限制暴露时间不超过根据科学接受的基于生理的药代动力学*(PBPK)模型或其等效模型明确规定的安全暴露限值灭火剂浓度和人体暴露时间。6.2对于惰性气体系统，对于设计浓度低于43%（相当于氧气浓度为12%，相当于海平面的氧气）的惰性气体系统，应提供限制暴露时间不超过5分钟或限制暴露于对于设计浓度在43%和52%之间（对应于12%和10%氧气，氧气的海平面当量）之间的惰性气体系统，不超过3分钟，根据最高预期环境温度下受保护空间的净体积计算.*参考文件FP44/INF.2-建立安全暴露标准的基于生理的药代动力学模型用于卤代烃灭火剂。6.3在任何情况下，卤化碳制剂的使用浓度均不得高于最低观察到的不利影响水平(LOAEL)或近似致死浓度(ALC)，惰性气体也不得用于气体浓度高于按净体积计算的52%的情况下。在最高预期环境温度下的受保护空间。”5现有第10和11段由以下内容代替：“10应制定措施确保暴露于受保护空间泄漏的逃生路线在药剂排放期间或之后不会变得危险。火灾事件。特别是，在火灾中会产生氟化氢(HF)蒸气，作为碳氟化合物灭火剂的分解产物，并对健康造成影响例如上呼吸道和眼睛刺激到影响逃生的程度。控制站和其他在火灾情况下需要有人值守的地点应规定在该地点将HF和HCl保持在5ppm以下。其他产品的浓度应在规定的时间内保持低于被认为是危险的浓度的曝光。“11药剂容器存放在受保护的空间内时，容器应均匀分布在整个空间内，并符合下列规定：.1手动启动的动力释放装置，位于受保护处所之外，应提供。应为此提供双重电源释放并应位于受保护空间之外，并立即可用；.2连接容器的电源电路应监测故障条件和断电。视觉和听觉警报应该是提供以表明这一点；.3连接容器的气动、电动或液压动力回路应该重复并广泛分开。气源或应监测液压的压力损失。视觉和应提供声音警报以表明这一点；.4在受保护处所内，释放受保护空间所必需的电路根据标准IEC或其他标准，系统应具有防火性同等标准。管道系统对系统的发布至关重要设计为液压或气动操作的应为钢制或其他等效的耐热材料，以满足行政;.5每个压力容器应装有自动超压装置释放装置，如果容器暴露在火灾和系统未运行的影响，将安全地排出内容物将容器移入受保护空间；.6容器和任何系统释放所必需的电路和管道的布置应使得在受保护处所内任何一个动力释放管线或容器阀因机械损坏、火灾或爆炸而损坏时，即单一故障概念，考虑到介质在整个空间内均匀分布的要求，至少仍可排放达到最低灭火浓度所需的药剂量；和。.7应监测容器因泄漏和排放而导致的压力下降。应在保护区、驾驶台或消防设备集中处所设置视觉和听觉警报，以指示这种情况。”6现有第14段由以下内容代替：“14对于所有船舶，灭火系统设计手册应说明控制灭火剂分解产物的推荐程序，包括碳氟化合物灭火剂产生的可能影响逃逸的HF蒸气。显然，药剂长时间暴露在高温下会产生更高浓度的这些类型的气体。应选择检测类型和灵敏度以及排放速率，以尽量减少试剂暴露于高温的时间。客船灭火装置的性能不应存在分解灭火剂对健康的危害，例如在客船上，分解产物不应在集合（组装）站附近排放。其他缓解措施包括疏散和戴上口罩。”7在附录第3节（试验方法）第3.4.2.2段中，将制造商推荐设计浓度“83%”的百分比替换为制造商推荐设计浓度“77%”的百分比。AMENDMENTSTOREVISEDGUIDELINESFORTHEAPPROVALOFEQUIVALENTFIXEDGASFIRE-EXTINGUISHINGSYSTEMS,ASREFERREDTOINSOLAS74,FORMACHINERYSPACESANDCARGOPUMP-ROOMS(MSC/CIRC.)1TheCommittee,atitseighty-fourthsession(7to16May),approvedamendmentstotheRevisedGuidelinesforapprovalofequivalentfixedgasfire-extinguishingsystems,asreferredtoinSOLAS74,formachineryspacesandcargopump-rooms(MSC/Circ.),setoutintheannex.2MemberGovernmentsareinvitedtoapplytheamendmentstotheRevisedGuidelineswhenapprovingequivalentfixedgasfire-extinguishingsystems,asreferredtoinSOLAS74,formachineryspacesandcargopump-roomsandbringthemtotheattentionofshipdesigners,shipowners,equipmentmanufacturers,testlaboratoriesandotherpartiesconcerned.ANNEX

1Inparagraph1,thereferences“SOLASregulationII-2/7andII-2/63”arereplacedbythereferences“SOLASregulationII-2/10.4andII-2/10.9”andthereference“SOLASregulationII-2/5”isreplacedbythereference“theFSSCode,chapter5”.2Inparagraph2,thereferences“SOLASregulationII-2/5.1,5.3.1,5.3.2to5.3.3”arereplacedbythereference“theFSSCode,chapter5,regulation2.1”.3Inparagraph3,thepercentageofthedesignconcentration“20%”isreplacedbythepercentageofthedesignconcentration“30%”.4Theexistingparagraph6isreplacedbythefollowing:“6Allsystemsshouldbedesignedtoallowevacuationoftheprotectedspacespriortodischarge.Meansshouldalsobeprovidedforautomaticallygivingaudibleandvisualwarningofthereleaseoffire-extinguishingmediumintoanyspaceinwhichpersonnelnormallyworkortowhichtheyhaveaccess.Thealarmshouldoperatefortheperiodoftimenecessarytoevacuatethespace,butnotlessthan20sbeforethemediumisreleased.Unnecessaryexposure,evenatconcentrationsbelowanadverseeffectlevel,shouldbeavoided.6.1Evenatconcentrationsbelowanadverseeffectlevel,exposuretogaseousfireextinguishingagentsshouldnotexceed5minHalocarbonagentsmaybeuseduptotheNoObservedAdverseEffectLevel(NOAEL)calculatedonthenetvolumeoftheprotectedspaceatthemaximumexpectedambienttemperaturewithoutadditionalsafetymeasures.IfahalocarbonagentistobeusedaboveitsNOAEL,meansshouldbeprovidedtolimitexposuretonolongerthanthetimespecifiedaccordingtoascientificallyacceptedphysiologicallybasedpharmacokinetic*(PBPK)modeloritsequivalentwhichclearlyestablishessafeexposurelimitsbothintermsofextinguishingmediaconcentrationandhumanexposuretime.6.2Forinertgassystems,meansshouldbeprovidedtolimitexposuretonolongerthan5minforinertgassystemsdesignedtoconcentrationsbelow43%(correspondingtoanoxygenconcentrationof12%,sealevelequivalentofoxygen)ortolimitexposuretonolongerthan3minforinertgassystemsdesignedtoconcentrationsbetween43%and52%(correspondingtobetween12%and10%oxygen,sealevelequivalentofoxygen)calculatedonthenetvolumeoftheprotectedspaceatthemaximumexpectedambienttemperature.*RefertodocumentFP44/INF.2Physiologicallybasedpharmacokineticmodeltoestablishsafeexposurecriteriaforhalocarbonfireextinguishingagents.6.3InnocaseshouldahalocarbonagentbeusedatconcentrationsabovetheLowestObservedAdverseEffectLevel(LOAEL)northeApproximateLethalConcentration(ALC)norshouldaninertgasbeusedatgasconcentrationsabove52%calculatedonthenetvolumeoftheprotectedspaceatthemaximumexpectedambienttemperature.”

5Theexistingparagraphs10and11arereplacedbythefollowing:“10Provisionsshouldbemadetoensurethatescaperouteswhichareexposedtoleakagefromtheprotectedspacearenotrenderedhazardousduringorafterdischargeoftheagentintheeventofafire.Inparticular,hydrogenfluoride(HF)vapourcanbeproducedinfiresasabreakdownproductofthefluorocarbonfireextinguishingagentsandcausehealtheffectssuchasupperrespiratorytractandeyeirritationtothepointofimpairingescape.ControlstationsandotherlocationsthatrequiremanningduringafiresituationshouldhaveprovisionstokeepHFandHClbelow5ppmatthatlocation.Theconcentrationsofotherproductsshouldbekeptbelowconcentrationsconsideredhazardousfortherequireddurationofexposure.11Whereagentcontainersarestoredwithinaprotectedspace,thecontainersshouldbeevenlydistributedthroughoutthespaceandmeetthefollowingprovisions:.1amanuallyinitiatedpowerrelease,locatedoutsidetheprotectedspace,shouldbeprovided.Duplicatesourcesofpowershouldbeprovidedforthisreleaseandshouldbelocatedoutsidetheprotectedspace,andbeimmediatelyavailable;.2electricpowercircuitsconnectingthecontainersshouldbemonitoredforfaultconditionsandlossofpower.Visualandaudiblealarmsshouldbeprovidedtoindicatethis;.3pneumatic,electricorhydraulicpowercircuitsconnectingthecontainersshouldbeduplicatedandwidelyseparated.Thesourcesofpneumaticorhydraulicpressureshouldbemonitoredforlossofpressure.Visualandaudiblealarmsshouldbeprovidedtoindicatethis;.4withintheprotectedspace,electricalcircuitsessentialforthereleaseofthesystemshouldbefireresistantaccordingtostandardIECorotherequivalentstandards.Pipingsystemsessentialforthereleaseofsystemsdesignedtobeoperatedhydraulicallyorpneumaticallyshouldbeofsteelorotherequivalentheat-resistingmaterialtothesatisfactionoftheAdministration;.5eachpressurecontainershouldbefittedwithanautomaticoverpressurereleasedevicewhich,intheeventofthecontainerbeingexposedtotheeffectsoffireandthesystemnotbeingoperated,willsafelyventthecontentsofthecontainerintotheprotectedspace;.6thearrangementofcontainersandtheelectricalcircuitsandpipingessentialforthereleaseofanysystemshouldbesuchthatintheeventofdamagetoanyonepowerreleaselineorcontainervalvethroughmechanicaldamage,fireorexplosioninaprotectedspace,i.e.asinglefaultconcept,atleasttheamountofagentneededtoachievetheminimumextinguishingconcentrationcanstillbedischargedhavingregardtotherequirementforuniformdistributionofmediumthroughoutthespace;and..7thecontainersshouldbemonitoredfordecreaseinpressureduetoleakageanddischarge.Visualandaudiblealarmsintheprotectedareaandonthenavigationbridgeorinthespacewherethefirecontrolequipmentiscentralizedshouldbeprovidedtoindicatethiscondition.”

6Theexistingparagraph14isreplacedbythefollowing:“14Forallships,thefire-extinguishingsystemdesignmanualshouldaddressre

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