1、BRITISH STANDARD BS EN 13648-2:2002 Cryogenic vessels Safety devices for protection against excessive pressure Part 2: Bursting disc safety devices for cryogenic service The European Standard EN 13648-2:2002 has the status of a British Standard ICS 23.060.40 NO COPYING WITHOUT BSI PERMISSION EXCEPT
2、AS PERMITTED BY COPYRIGHT LAWBS EN 13648-2:2002 This British Standard, having been prepared under the direction of the Engineering Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 3 July 2002 BSI 3 July 2002 ISBN 0 580 39973 7
3、National foreword This British Standard is the official English language version of EN 13648-2:2002. The UK participation in its preparation was entrusted to Technical Committee PVE/18, Cryogenic vessels, which has the responsibility to: A list of organizations represented on this committee can be o
4、btained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facili
5、ty of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users of this publication are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity f
6、rom legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in th
7、e UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 8, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Dat
8、e CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN136482 May2002 ICS23.060.40 Englishversion CryogenicvesselsSafetydevicesforprotectionagainst excessivepressurePart2:Burstingdiscsafetydevicesfor cryogenicservice RcipientscryogniquesDispositifsdeprotectioncontre lessupressionsPartie2:Disposi
9、tifdescuritdisque derupturepourservicecryognique KryoBehlterSicherheitseinrichtungengegen DruckberschreitungTeil2:Berstscheibeneinrichtungen ThisEuropeanStandardwasapprovedbyCENon5April2002. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope
10、 an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagem
11、adebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Iceland,Ireland,Italy,Luxembourg,Malta,Netherla
12、nds,Norway,Portugal,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2002CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.N
13、o.EN136482:2002EEN136482:2002(E) 2 Contents page Foreword3 1 Scope 4 2 Normativereferences 4 3 Termsanddefinitions. .5 4 Requirements .5 4.1 General5 4.2 Design .5 4.2.1 Designtemperature .5 4.2.2 Coincidenttemperature .5 4.2.3 Sublimatingcryogens .6 4.3 Materials6 4.3.1 General6 4.3.2 Metallicmater
14、ials .6 4.3.3 Corrosionresistance .6 4.3.4 Oxygencompatibility .6 4.3.5 Acetylenecompatibility. 6 4.3.6 Nonmetallicmaterials .6 5 Productiontesting .7 5.1 Pressureandbursttests .7 5.2 Additionaltestsforburstingdiscsafetydeviceswithnonreplaceableburstingdisc assemblies7 5.2.1 Leaktests 7 5.2.2 Visual
15、examination 7 6 Cleanliness .7 7 Marking .7 8 Preventionofsubstitution 7 AnnexZA (informative) ClausesofthisEuropeanStandardaddressingessentialrequirementsorother provisionsofEUDirectives 8EN136482:2002(E) 3 Foreword Thisdocument(EN136482:2002)hasbeenpreparedbyTechnicalCommitteeCEN/TC268“Cryogenicve
16、ssels“, thesecretariatofwhichisheldbyAFNOR. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofanidenticaltextor byendorsement,atthelatestbyNovember2002,andconflictingnationalstandardsshallbewithdrawnatthelatest byNovember2002. Thisdocumenthasbeenpreparedunderamandateg
17、iventoCENbytheEuropeanCommissionandtheEuropean FreeTradeAssociation,andsupportsessentialrequirementsofEUDirective(s). ForrelationshipwithEUDirective(s),seeinformativeannexZA,whichisanintegralpartofthisdocument. ThisdocumentalsosupportstheobjectivesoftheframeworkDirectivesonTransportofDangerousGoods.
18、This standardhasbeensubmittedforreferenceintotheRIDand/orthetechnicalannexesoftheADR. ThisEuropeanStandardiscomposedofthefollowingParts: EN136481, CryogenicvesselsSafetydevicesforprotectionagainstexcessivepressurePart1:Safetyvalves forcryogenicservice; EN136482, CryogenicvesselsSafetydevicesforprote
19、ctionagainstexcessivepressurePart2:Burstingdiscs safetydevicesforcryogenicservice; prEN136483,CryogenicvesselsSafetydevicesforprotectionagainstexcessivepressurePart 3 : DeterminationofrequireddischargeCapacityandsizing. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsof
20、thefollowing countriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,CzechRepublic,Denmark,Finland, France,Germany,Greece,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Spain, Sweden,SwitzerlandandtheUnitedKingdom.EN136482:2002(E) 4 1Scope ThisEuropeanStandardspecifiesth
21、erequirementsforthedesign,manufactureandtestingofburstingdiscsafety devicesforcryogenicservice,i.e.foroperationwithcryogenicfluidsbelow10Cinadditiontooperationat ambienttemperature.Itisarequirementofthisstandardthattheburstingdiscsafetydevice(s)comply withprENISO41262.Intheeventofdifferentrequiremen
22、ts,thisstandardtakesprecedenceoverthatstandard. ThisstandardisrestrictedtoburstingdiscsafetydevicesnotexceedingasizeofDN100designedtorelievesingle phasevapoursorgases.Aburstingdiscassemblycanbespecified,constructedandtestedsuchthatitissuitable forusewithmorethanonegasorwithmixturesofgases. NOTE This
23、standarddoesnotprovidemethodsfordeterminingthecapacityofburstingdiscsafetydevicesforaparticular cryogenicvessel.SuchmethodsareprovidedinprEN136483. 2 Normativereferences ThisEuropeanStandardincorporates,bydatedorundatedreference,provisionsfromotherpublications.These normativereferencesarecitedatthea
24、ppropriateplacesinthetextandthepublicationsarelistedhereafter.For datedreferences,subsequentamendmentstoorrevisionsofanyofthesepublicationsapplytothisEuropean standardonlywhenincorporatedinitbyamendmentorrevision.Forundatedreferencesthelatesteditionofthe publicationreferredtoapplies(includingamendme
25、nts). EN12511:2000, CryogenicvesselsTransportablevacuuminsulatedvesselsofnotmorethan1 000 litres volumePart1:Fundamentalrequirements. EN12521:1998,CryogenicvesselsMaterialsPart 1:Toughnessrequirementsfortemperatures below80C. EN17971, CryogenicvesselsGas/materialcompatibilityPart1:Oxygencompatibilit
26、y. EN12300:1998, CryogenicvesselsCleanlinessforcryogenicservice. ENISO6708:1995, PipeworkcomponentsDefinitionandselectionofDN(nominalsize)(ISO6708:1995). prEN12522, CryogenicvesselsMaterialsPart2:Toughnessrequirementsfortemperaturesbetween80C and20C. EN134581, CryogenicvesselsStaticvacuuminsulatedve
27、sselsPart1:Fundamentalrequirements. EN135301,CryogenicvesselsLargetransportablevacuuminsulatedvesselsPart 1:Fundamental requirements. prEN136483,CryogenicVesselsSafetydevicesforprotectionagainstexcessivepressurePart 3: DeterminationofrequireddischargeCapacityandsizing. prENISO41262, Safetydevicesfor
28、protectionagainstexcessivepressurePart2:Burstingdiscsafetydevices (ISO/FDIS41262:2002).EN136482:2002(E) 5 3 Termsanddefinitions ForthepurposesofthisEuropeanStandard,thefollowingtermsanddefinitionsapplyinadditiontothosegiven inprENISO41262. 3.1 DN(nominalsize) alphanumericdesignationofsizeforcomponen
29、tsofapipeworksystem,whichisusedforreferencepurposes.It comprisesthelettersDNfollowedbyadimensionlesswholenumberwhichisindirectlyrelatedtothephysicalsize, inmillimetres,oftheboreoroutsidediameteroftheendconnections ENISO6708:1995 3.2 pressure pressureforwhichthevalueisequaltothealgebraicdifferencebet
30、weentheabsolutepressureandthe atmosphericpressure 3.3 specifiedminimumtemperature lowesttemperatureforwhichtheburstingdiscsafetydeviceisspecified 3.4 specifiedmaximumtemperature highesttemperatureforwhichtheburstingdiscsafetydeviceisspecified 3.5 coincidenttemperature temperatureoftheburstingdiscass
31、ociatedwithaburstingpressureandwhichistheexpectedtemperatureofthe burstingdiscatthepressureintheemergencysituation 3.6 cryogenicfluids fluiddefinedascryogenicfluidinEN12511:2000orprEN134581orprEN135301 NOTE Thisincludestotallyevaporatedliquidsandsupercriticalfluids. 3.7 burstingdiscsafetydevicewitha
32、nonreplaceableburstingdiscassembly burstingdiscsafetydevicewhoseburstingdiscassemblyispermanentlyjoinedtotheburstingdischolderbythe manufacturer 4Requirements 4.1General TheburstingdiscsafetydeviceshallsatisfyalltherequirementsofprENISO41262exceptineventofdifferent requirements,wherethisstandardtake
33、sprecedence. 4.2Design 4.2.1Design temperature Thespecifiedminimumtemperatureshallbeequaltotheequilibriumtemperatureatatmosphericpressureofthe coldestfluidtoberelieved.Thespecifiedmaximumtemperatureshallbe+65Cunlessahighertemperatureis specifiedinthepurchaseorder. 4.2.2 Coincidenttemperature Thecoin
34、cidenttemperatureshallbe20Cunlessotherwisespecifiedbythepurchaseorder.EN136482:2002(E) 6 4.2.3 Sublimatingcryogens Wheretheburstingdiscsafetydeviceisspecifiedassuitableforservicewithproductsthat,whenventedto atmospherefromapressureanywherebetweenthedevicesspecifiedmaximumandminimumburstingpressures
35、andatatemperatureanywherebetweenthedevicesspecifiedmaximumandminimumtemperatures,condense fromgasorvapourdirectlytosolid,e.g.CO 2 ,thedesignshallbesuchastoavoidreductionofthedischargearea belowthatrequiredduetoaccumulationofsolidproduct. 4.3Materials NOTE Thisclauseindicatesimportantmaterialproperti
36、esforsafeuseofsafetyvalves(absenceofbrittleness,gas compatibility,etc.).ItdoesnotaddressallthePEDessentialrequirementsrelevanttomaterials(e.g.norecommendedmateria ls arelisted). 4.3.1General Materialsshallbecompatiblewiththeprocessfluid. 4.3.2Metallic materials Metallicmaterialsshallbeinconformancew
37、ithEN12521:1998orprEN12522asappropriatetothespecified minimumtemperature.Thestrengthofthematerialsshallbeadequatefortheirdutyatthemaximumspecified temperature. 4.3.3Corrosion resistance Inadditiontonormalatmosphericcorrosiveagentsassociatedwithindustrialatmospherestheenvironment surroundingcryogenic
38、vesselsischaracteristicallyoneofpersistentlowambienttemperaturestogetherwithhigh humidity.Thusparticularcaremustbetakentoensurethattheselectedmaterialsoftheburstingdisc,together withanycoating,andoftheburstingdiscsafetydeviceareappropriatesuchthatprematurefailureoranyother malfunctioncannotoccur.Alu
39、miniumdiscsshallbecoatedwithacorrosionresistantpolymerontheatmospheric sideonly. Somecopperalloysaresusceptibletostresscorrosioncracking,consequentlycarefulconsiderationshallbegiven beforeselectionofthesematerialsforcomponentsunderstress. 4.3.4 Oxygencompatibility Ifthespecifiedminimumtemperatureise
40、qualtoorbelowtheboilingpointofairortheburstingdiscassemblyis intendedforservicewithoxygenoroxidisingproducts,thematerialsshallbeoxygencompatibleinaccordance withEN17971. 4.3.5Acetylene compatibility Metallicmaterialsshallcontainlessthan70%copperifspecifiedforusewithmixturescontainingacetylene. 4.3.6
41、Nonmetallic materials Nonmetallicmaterialsare,sofar,wellestablishedforusefornonintegralburstingdi scsandforsealsandgaskets. Ifsuchmaterialsaretobeusedforstructuralparts,suchastheholder,theyshallhavepropertiesappropriateto theapplicationandatleastmeettherequirementsof4.3.2. Nonmetallicmaterialsshalla
42、lso: havemechanicalpropertiesthatwillallowtheburstingdiscsafetydevicetopassthetestsdefinedinclause5; meettherequirementsof4.3.4.EN136482:2002(E) 7 5Production testing 5.1 Pressureandbursttests TheyshallbeperformedinaccordancewiththerequirementsofprENISO41262.Burstingdiscswithacorrosion resistingcoat
43、ingshallhavetheeffectivenessofthatcoatingdemonstratedpriortopressuretesting.Thepressure testmediumshallbecleanwaterforhydraulictestsoroilfreeairoraninertgassuchasnitrogenforpneumatic tests. 5.2 Additionaltestsforburstingdiscsafetydeviceswithnonreplaceableburstingdisc assemblies 5.2.1Leak tests Eachb
44、urstingdiscsafetydevicewithanonreplaceableburstingdiscassemblyshallbesubjectedtoan appropriateleaktestthatwilldemonstratetheintegrityofthejointbetweentheburstingdiscanditsholder.Typical testsmightinclude,butarenotrestrictedto,amassspectrometersensingheliumcalibratedforaleak of10 9 mbarl/s,withvacuumontheven
