苯乙烯储存、储罐最低要求

29.3.06.(JH)FinalDraft最终版本Minimumcontrol最低要求Temperatureindicatorandhightemperaturealarmfittedonstoragetankandsetat30degreesC储罐装温度计量仪,高温报警器(设定在30度)Purenitrogenblanketingisnotacceptable纯净的氮封是不可接受的Circulationcapability循环能力MaximumstoragetemperatureforStyreneMonomeris25degreesC苯乙烯的最大储存温度为25摄氏度ProposedMinimumandRecommendedControlsforShellmanagedorcontractedStyreneMonomerStorageTanks(thisexcludescustomertanksandtanksonourownmanufacturingsites).ThisdocumentsshouldbeusedinconjunctionwiththerelevantHSSEchecklist本清单适用于公司管理或租用的苯乙烯储罐(不包括客户和生产现场的储罐).本清单应该和有关检查表一并使用.Assumingminimumcirculationcapability-appropriateoxygen(minimumoxygenconcentrationinvapourgap,6-8%)andinhibitorlevels(min10ppmpTBC)mustbemaintainedduringstorage假定最小的循环能力-适当的氧气含量(气相中氧气含量最小为6-8%)和抑聚剂水平(最小10ppmPtbc)必须在储存期间有效保留NOTES:TheTechnicalExpertandtheHSSEAdvisormustusetheirexpertjudgementtoassesswhethertheseMinimumControlshavebeenmet.Ifthereareareaswhichrequireadditionalguidance-theassessorsmustconsultwithotherShellTechnicalorHSSEExpertspriortomakingafinalassessmentofthefacility(seeattachedlist).说明:技术专家和HSSE顾问必须应用他们的专用判定以确定是否符合最低的控制要求.如需要额外的指导,评估人可和壳牌公司技术和HSSE专家进行咨询,以完成最终的评估Tanklinings-stainlesssteelorlinedcarbonsteel(inorganiczincsilicate,bakedphenolicandmodifiedepoxycoatings).储罐内衬-不锈钢或加喷涂的碳素钢(无机锌硅酸盐,烘培石碳酸和改良环氧涂料)Pumpsandlines-stainlesssteel,galvanisedsteelorcarbonsteel泵和管线-不锈钢,镀锌钢和碳素钢Effectivecleaningprocedures有效的清洗程序JHeath2019/12/3Tanksmustbedesignedaccordingtorecognisedinternationalstandardse.g.API650,API2000,BS2654.储罐应按国际标准设计,如API650,BS2654CriticalParameter/Method关键参数/方法Inhibitoranalysis抑聚剂含量ASTMD4590-92Polymeranalysis聚合物分析ASTMD2121-90Colour颜色ASTMD1209-93Water水分ASTMD1364-90StyreneMonomertemperature苯乙烯温度Recommendedcontrols建议的控制措施Assumingadequatecirculationcapability-recommendedstoragedurationof30daysmaximumfortemperaturesupto30degreescentigrade.Afterwhichproductwillgooffspec.andchillingisrecommended假定有足够的循环能力-推荐储存最大期限为30天,温度30度.在此后产品将超标,建议冷冻处理FlameArrestorsonPVVOutletsarenotrecommended.Ifanopenventisused,thenaflamearrestorisrequiredforfiresafetyreasons.Quarterlyinspectionrecommended.泄压阀出口安装阻火器是不推荐的.如采用了开式通气口,那么需要安装阻火器以起到防火的作用.建议每季度进行检查Dedicatedlinesarerecommended.建议采用专用管线Slopedlines,nolowpoints(avoidstagnancy),smoothsurfaces(coating,nozzlesbelowliquidlevel)arerecommended.建议采用倾斜的管线,没有低点(防止产品停滞),光滑的表面(涂料,在液面下的管口)Sufficientventingcapacitytoavoidover-pressurisation足够的排放能力,以避免过压Quarterlyinspectiontoensurenopolymerbuild-upinhoses,tanks,valves,lines,ventsetc.isrecommended每季度检查是否在管线,储罐,阀门,软管,排气口等有聚合物生成Provisiontoapplyinternalfoaminjectiontostoragetankisrecommended建议安装向罐内加注泡沫的设施Avoidpotentialsourcesofcontamination避免可能的污染源Contingencyplanningintheeventofapolymerisationevent对由于聚合可能造成的事故制定应急计划AdditionalreferencematerialProductSafetyDataSheets()QuarterlyinspectionofPVVisrecommended每季度检查泄压阀NOTES:RecommendedControlsrepresentadditionalgoodpracticemeasureswhichshouldbeconsideredanddiscussedduringtheassessment说明:建议的控制措施表示为推荐的良好做法,应该考虑采纳,并在评估时讨论Assumingminimumcirculationcapability-appropriateoxygen(minimumoxygenconcentrationinvapourgap,6-8%)andinhibitorlevels(min10ppmpTBC)mustbemaintainedduringstorage假定最小的循环能力-适当的氧气含量(气相中氧气含量最小为6-8%)和抑聚剂水平(最小10ppmPtbc)必须在储存期间有效保留Facilitytotestforcriticalparameters测试关键参数的设施Intheeventofasignificantchangetooneoftheabove-thefrequencyofmeasurementshouldbeincreasedandadditionalparametersshouldbemeasured如上述任何一个发生明显变化,测试频率应提高,并测试额外参数AssumingtheaboveMinimumRequirementsaremet,thecriticalparametersandmeasurementfrequencyareasfollows假定上述最低条件得到满足,关键数据和测量的频率如下JHeath2019/12/3ShellCanadaStyreneStorageandHandlingguideCEFICStyreneDistributionGuidelines://://sww-knowledge.shell.com/knowhow/livelink.exe/fetch/2000/1476603/5462918/14988587/14992228/28633521/index.htm?nodeid=20635803&vernum=0WhoaretheShellexperts/focalpointswhocanbecontactedforadvice?Styrenestorageandhandling:Sitecontacts:Styrenereactionkinetics:StyreneProductStewardshipandHSEadvice:JHeath2019/12/3GuidancenotesforassessorOndemand-ideallyminimumcirculationtoachievehomogeneityinoneday.Ingeneral,circulationofthreevolumeswillachievehomogeneity,however,itisrecognisedthatthismaytakeupto3-4days按要求－理想的在一天内能达到最小的均匀一致的要求。一般来说，循环3个体积量能达到均衡性，但是，这可能需要3－4天Checksuitablelocationforsamplinginthatcirculationloop检查循环回路的取样点Afterdischargeofnewproductintotank-circulationshouldbeinitiatedfor24hours新产品进罐后，应在24小时内完成循环Mixingachievesuniformtemperatureandcomposition(polymer,oxygenandinhibitor).Therefore,inlet,outletandrecirculationconnectionsareideallylocatednearthebottomofthetankandcanbereversedsothattheproductispumpedfromthebottomanddischargedthroughtheswingpipebelowtheliquidsurface.混合达到均衡的温度和组成（聚合物，氧气和阻聚剂）为此，进料、出料和再循环管线最理想的是位于储罐的底部，并可倒转，以便产品从底部泵出，从液面下的回转管排出。Adequatetechnicalmeasurestocontrolproducttemperatureinstoragetanksmustbeprovidedinlocationswheretemperaturesroutinelyexceed25degreesC.Adequatetechnicalmeasuresmayincludecooling/