进口阻火阀德国阻火器又名防火器、管道防火器，是防止外部火焰窜入存有******气体的设备、管道内或阻止火焰在设备、管道间蔓延。它是用来阻止介质（如氢气，氧气等）火焰向外蔓延的安全装置，由一种能够通过气体的、具有许多细小通道或缝隙的固体材料（阻火元件）所组成。管道防爆阻火器是用来阻止***气体、液体的火焰蔓延和防止回火而引起***的安全装置。通常装在输送或排放******气体的管线上。如火炬、加热燃烧系统、***体回收系统或其他***气体系统。在早期阻火器就已被应用在石油工业中，以后又广泛用用于矿山、煤矿、水运及化学工业中。在石油工业中，阻火器被广泛应用在石油及石油产品的储罐上。当储存轻质石油产品的油罐遇到明火或雷击时，就可能引起火灾。为了防止这种***的产生而使用阻火器。进口阻火器-工作原理（传热作用、器壁效应）传热作用：燃烧所需要的必要条件之一就是要达到一定的温度,即着火点。低于着火点,燃烧就会停止。依照这一原理,只要将燃烧物质的温度降到其着火点以下,就可以阻止火焰的蔓延。当火焰通过阻火元件的许多细小通道之后将变成若干细小的火焰。设计阻火器内部的阻火元件时,则尽可能扩大细小火焰和通道壁的接触面积,强化传热,使火焰温度降到着火点以下,从而阻止火焰蔓延。器壁效应：燃烧与***并不是分子间直接反应,而是受外来能量的激发,分子键遭到***,产生活化分子,活化分子又分裂为寿命短但却很活泼的自由基,自由基与其它分子相撞,生成新的产物,同时也产生新的自由基再继续与其它分子发生反应。当燃烧的可燃气通过阻火元件的狭窄通道时,自由基与通道壁的碰撞几率增大,参加反应的自由基减少。当阻火器的通道窄到一定程度时,自由基与通道壁的碰撞占主导地位,由于自由基数量急剧减少,反应不能继续进行,也即燃烧反应不能通过阻火器继续传播。随着阻火器通道尺寸的减小,自由基与反应分子之间碰撞几率随之减少,而自由基与通道壁的碰撞几率反而增加,这样就促使自由基反应减低。当通道尺寸减少到某一数值时,这种器壁效应就造成了火焰不能继续传播的条件,火焰即被阻止。因此器壁效应是防止火焰的主要机理。进口阻火器-测度标准对阻火器进行测试鉴定的要求，世界各国不尽相同，现将几个***对阻火器测试要求的情况简介如下：（1）英国消防研究部门要求阻火器应具备阻爆和耐烧两种性能。测试阻火器的介质不能使用氢气和***气体，规定使用丙烷。阻火器耐烧时间要求2小时。（2）德国标准规定，对于容量大于1000升的储罐上用的阻火器必须具备阻爆和耐烧两种性能。试验介质不能用氢气和***气体，要求阻火器耐烧时间为2小时。（3）苏联对阻火器要求具备阻爆和耐烧两种性能。试验用的介质即为阻火器使用时的介质。阻火器耐烧时间要求为2小时。（4）日本对阻火器要求进行阻爆和耐烧性能的试验，试验介质可用已烷气体。（5）美国于1936年制定石油及***储罐阻火器测试***标准，后又经过几次修订。标准要求石油储罐上的阻火器应具备阻爆和耐烧两种性能进口阻火器主体材质A3（WCB）L2304（CF3）316（CF8M）316（CF3M）衬里公称通径/压力：DN15-400mm(1/2-16”)PN0.6-5.0MPa(150-600Lb)阻火层材质：304304L316316L哈氏合金蒙乃尔合金防爆等级BS5501：IIAIIBIIC螺帽螺栓：20#304304L316316L密封垫片：丁晴橡胶垫片聚四氟乙烯垫片石墨垫片密封面：突面（RF）平面（FF）凹凸面（MFM）榫槽面（TG）法兰标准：HGGBHGJJBANSTJISDINSBNF连接形式：法兰连接（II）内螺纹连接（III）外螺纹连接（IV）对焊连接（I）工作温度：碳钢：-30℃~+350℃不锈钢：-80℃~+480℃产地品牌：德国ORSEN奥尔申北京华泰辉阀门有限公司（http://www.bj-)是德国ORSEN奥尔申阀门集团在中国的***代理，其业务为负责德国ORSEN奥尔申阀门集团在中国的***渠道运作，是中国大陆***有权***一级代理单位，我处迄今只针对项目***，并未***区域代理商。公司以***的研发和生产中心，覆盖***的销售（010-57165677、13718983583)和服务网络，***的品质和资源优势，得到国际上许多石化、电力、冶金用户的认同。ImportedFirevalveGermany,alsoknownasfireflamearresters,pipeflamearrestoristopreventexternalflamefleeingthereareflammableorexplosivegasequipment,pipelineorpreventflamespreadbetweendevices,pipes.Itisusedtopreventthemedia(suchashydrogen,oxygen,etc.)safetymeansflamespreadoutwardlybyathroughgaspassageh***ingapluralityof***allslitsorsolidmaterial(fireretardantelement)formed.Pipelineexplosionflamearresterisusedtopreventflammablegas,liquidflamespreadandcauseasafetydevicetopreventtemperingexplosion.Usuallymountedonapipelinetotransportflammablegasesoremissi***.Suchasatorch,burningheatingsystems,oilvaporrecoverysystemorotherflammablegassystems.Intheearlyarresterhadbeenusedintheoilindustry,andlaterwidelyusedformining,coal,waterandchemicalindustries.Intheoilindustry,theflamearresteriswidelyusedinthepetroleumandpetroleumproductsstoragetanks.Whenlightpetroleumproductstoragetanksencounteredfireorlightning,itmaycauseafire.Inordertopreventthisdangergeneratedusingflamearrester.Importflamearrester-works(heateffect,thewalleffect)Heateffect:Oneofthenecessaryconditi***requiredforcombustionistoreachacertaintemperature,theignitionpoint.Belowtheignitionpoint,theburningstops.Accordingtothisprinciple,aslongasthecombustiontemperatureofthesubstancedroppedbelowitsignitionpoint,canpreventthespreadofflame.Aftermanyofthe***allpassagethroughtheflamearresterelementwillbecomesometinyflame.Whendesigningtheinteriorofthearresterarresterelementstomaximizethecontactareais***allandthechannelwallofflame,heattransferenhancement,theflametemperaturedropsbelowtheignitionpoint,therebypreventingthespreadofflame.Walleffect:Combustionandexplosionisnotdirectlybetweenmolecularreaction,butbyexternalexcitationenergyofmolecularbonddestruction,resultingintheactivationofmolecules,activationofmolecularlifeagainsplitintoshortbutveryactivefreeradicalscollidewithothermoleculestogenerateanewproduct,butalsoproducenewradicalsthenreactedcontinuedwithothermolecules.Whenthecombustiongasthroughthenarrowchannelcanfireretardantelements,freeradicalsandthechannelwallcollisionprobabilityincreases,reducingfreeradicalsparticipateinthereaction.Whentheflamearresternarrowchanneltoacertainextent,impactoffreeradicalsandthechannelwalldominatesduetothesharpreductioninthenumberoffreeradicals,thereactiondoesnotproceed,thatthecombustionreactioncannotcontinuetospreadthroughtheflamearrester.Withthepassagebetweenthedecreasingsizeoftheflamearrester,freeradicalsandreactivemoleculescollisionprobabilitybereduced,whiletheRadicalsandthechannelwallbutincreasedprobabilityofcollision,thusreducingtheurgeradicalreacti***.Whenthechannelsizereductiontoacertainvalue,whichiscausingtheconditionofthewalleffectcannotcontinuetoflamepropagation,flameJibeiblocked.Thusthewalleffectisthemainmechani***topreventtheflame.Importflamearrester-MeasureStanda***Identificationoftheflamearrestertestrequirementsvaryaroundtheworld,nowseveralnationaltestrequirementsforflamearrestorasoutlinedbelow:(1)Britishfireresearchdepartmentforthearrestershouldh***eburstresistanceandresistancetofiretwoproperties.Arrestertestmediacannotusehydrogenandacetylenegas,requiretheuseofpropane.Fire-resistantburntimerequirementistwohours.(2)Germanstanda***,thecapacityformorethan1000litersofstoragetanksmusth***eaflamearresterexplosionresistanceandresistancetofiretwoproperties.Testmediumcannotbeusedhydrogenandacetylenegas,burnresistancerequirementsZuhuotimeis2hours.(3)requirestheSovietarresterexplosionresistanceandresistancetofiretwoproperties.Testmediumisthemediumflamearresteruse.Zuhuoresistantburntimerequirementsfortwohours.(4)Japanarrestertestrequirements,testmediaexplosionresistanceandresistancetofireperformance***ailablehexanegas.(5)theUnitedStatestodevelopoilandgasolinetanksarrestertestnationalstandardin1936,andthenafterafewrevisi***.Standardoiltankontheflamearrestershouldh***eburstresistanceandresistancetofiretwopropertiesImportflamearrestermainmaterial?A3(WCB)L2304(CF3)316(CF8M)316(CF3M)liningNominaldiameter/pressure:DN15-400mm(1/2-16")PN0.6-5.0MPa(150-600Lb)FireLayerMaterial:304304L316316LHastelloyMonelExplosionlevelsBS5501:IIAIIBIICNutsBolts:20#304304L316316LGasket:NBRGasketPTFEgasketgraphitegasketSealingsurface:raisedface(RF)plane(FF)convexsurface(MFM)tongueandgroove(TG)FlangeStandard:HGGBHGJJBANSTJISDINSBNFConnection:Flanged(II)threadedconnection(III)externalthreadconnection(IV)weldedconnecti***(I)Workingtemperature:carbonsteel:-30℃~+350℃stainlesssteel:-80℃~+480℃BrandOrigin:GermanyORSENOrrShenBeijingHuataiHuiValveCo.,Ltd.(http://www.bj-)istheonlyagentinGermanyORSENOrrShenValveGroupinChina,anditsbusinessisinchargeoftheGermanORSENOrrShenValveGrouponlychanneloperati***inChina,mainlandChinaisthesolerighttoauthorizeanagent,Iplacesofaronlyforprojectsauthorized,notauthorizedregionalagent.Company-classR&Dandproductioncenter,globalsales(010-80842199,13718983583)andservicenetwork,superiorqualityandresources,manyinternationalpetrochemical,power,metallurgyuser'sidentity.)