1、BRITISH STANDARD BS EN 13371:2002 Cryogenic vessels Couplings for cryogenic service The European Standard EN 13371:2001 has the status of a British Standard ICS 23.020.40 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS EN 13371:2002 This British Standard, having been prepare
2、d under the direction of the Engineering Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 5 March 2002 BSI 5 March 2002 ISBN 0 580 39213 9 National foreword This British Standard is the official English language version of EN 1
3、3371:2001. 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 obtained on request to its secretary. Cross-references The British Standards which implemen
4、t international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport
5、to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible European com
6、mittee 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 the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to
7、 9 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. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN13371 December2001 ICS23.020.40;23.040.70 Englishversion CryogenicvesselsCoup
8、lingsforcryogenicservice RcipientscryogniquesRaccordspourservice cryognique KryoBehlterKupplungenfrdentiefkaltenBetrieb ThisEuropeanStandardwasapprovedbyCENon11November2001. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthest
9、atusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation
10、 undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Iceland,Ireland,Italy,Luxembourg,Netherlands,Norway,Portugal,Spa
11、in,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2001CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN13371:2001EEN13371:
12、2001(E) 2 Contents page Foreword3 1 Scope 4 2 Normativereferences 4 3 Termsanddefinitions. .4 4 Generalrequirements 5 4.1 Designandconstruction. 5 4.2 Materials5 5 Prototypetests. 6 5.1 General6 5.2 Inspection .6 5.2.1 Designverification. 6 5.2.2 Dimensionofthecoupling. .6 5.2.3 Identificationofmate
13、rial .6 5.2.4 Cleanlinesscheck. .6 5.3 Testing 6 5.3.1 General6 5.3.2 Pressuretest . .6 5.3.3 Leaktests 6 5.3.4 Strengthtest. 7 5.3.5 Functionaltest. .7 6 Cleaningandpackaging 7 7 Marking .7 AnnexZA (informative) ClausesofthisEuropeanStandardaddressingessentialrequirementsorother provisionsofEUdirec
14、tives .8 Bibliography 9EN13371:2001(E) 3 Foreword ThisEuropeanStandardhasbeenpreparedbyTechnicalCommitteeCEN/TC268“Cryogenicvessels“,the secretariatofwhichisheldbyAFNOR. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofanidenticaltextor byendorsement,atthelatestbyJun
15、e2002,andconflictingnationalstandardsshallbewithdrawnatthelatestJune 2002. ThisEuropeanStandardhasbeenpreparedunderamandategiventoCENbytheEuropeanCommissionandthe EuropeanFreeTradeAssociation,andsupportsessentialrequirementsofEUDirective(s). ForrelationshipwithEUDirective(s),seeinformativeannexZA,wh
16、ichisanintegralpartofthisstandard. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowingcountriesarebound toimplementthisEuropeanStandard:Austria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece,Iceland, Ireland,Italy,Luxembourg,Netherlands,Norway,Po
17、rtugal,Spain,Sweden,SwitzerlandandtheUnitedKingdom.EN13371:2001(E) 4 1Scope ThisEuropeanStandardspecifiestheminimumrequirementsforthedesign,manufactureandtestingofcouplings forcryogenicservicetobeusedfortemporaryconnectingofflexiblehosestocryogenicvesselsatthefollowing operatingconditions: designtem
18、peraturerangefrom270 Cto+65C; maximumnominalpressure:80bar; nominalsize(DN)from10to100. Permanentconnectionssuchasflangesandunionsarenotcoveredbythisstandard. Itisintendedthatthecouplingsshouldbedesigned,testedandmarkedforserviceatoneofthegenerallyaccepted pressuree.g.PN40.Couplingscanthenbeselected
19、withaPNequaltoorgreaterthanthemaximumallowable pressure(PS)oftheequipmentforwhichtheyaretobeused. 2 Normativereferences ThisEuropeanStandardincorporatesbydatedorundatedreference,provisionsfromotherpublications.These normativereferencesarecitedattheappropriateplacesinthetextandthepublicationsareliste
20、dhereafter.For datedreferences,subsequentamendmentstoorrevisionsofanyofthesepublicationsapplytothisEuropean Standardonlywhenincorporatedinitbyamendmentorrevision.Forundatedreferencesthelatesteditionofthe publicationreferredtoapplies(includingamendments). EN12521, CryogenicVesselsMaterialsPart1:Tough
21、nessrequirementsfortemperaturesbelow80C EN12522 ,CryogenicVesselsMaterialsPart2:Toughnessrequirementsfortemperaturesbetween10Cto 80C EN1333:1996, PipeworkcomponentsDefinitionandselectionofPN EN17971, CryogenicvesselsGas/materialscompatibility EN12300, CryogenicvesselsCleanliness ENISO6708:1995, Pipe
22、workcomponentsDefinitionandselectionofDN(nominalsize) (ISO6708:1995) 3 Termsanddefinitions ForthepurposesofthisEuropeanStandard,thefollowingtermsanddefinitionsapply. 3.1 nominalsize(DN) asdefinedinENISO6708:1995 3.2 nominalpressure(PN) asdefinedinEN1333:1996 NOTE1 PN PS(asdefinedinPED) NOTE2 Seealso
23、thelastsentenceofthescope. 3.3 designtemperaturerange highestandlowesttemperaturetowhichthecouplingisspecifiedEN13371:2001(E) 5 3.4 specifiedminimumtemperature specifiedminimumtemperatureisthelowesttemperatureforwhichthecouplingmaybespecified 4 Generalrequirements 4.1Designandconstruction Couplingss
24、hallbeabletobeconnectedanddisconnectedwithinthefulldesigntemperaturerange.Themethodof assemblingandnecessaryforceshallbespecified.Thecouplingshallbesodesignedthatthenecessaryforceto connectordisconnectitmaybeappliedbyhandtoolsinacontrolledmanner. Thedesignshallbesuchthatdisconnectionunderpressurewil
25、lbeobviousbyaudiblegasventingorothermethod beforecompletedisconnection. Thedesignshallbesufficientrobusttowithstandworstanticipatedhandlinge.g.droponpavementandthe hammeringetc. Theburstpressureshallbemorethanthreetimesthenominalpressurewithinthedesigntemperaturerange(see 5.3.4). Couplingsshallbelea
26、ktightinaccordancewith5.3.3. Couplingsshallbemadeinsuchawaythatanticipatedvibrationsfromvehicleengine,pumporpulsatingflowmay notcauseleakage. Couplingsforflammablefluidsshallbeelectricallyconductivefromoneendtotheother(electricalresistanceless than0,5 ) Couplingsshouldhaveadequateprotections,suchasa
27、caporaplug,formatingsurfacesandthethreadagainst damageorcontamination.Thedesignofanycaporplugshouldtakeinconsiderationthepossibilityofleakageof residualproduct. Ifsealsareusedtheyshouldbedesignedforlonglifeoreasyreplacementandaninstructionformaintenanceshall begiven. 4.2Materials Allcouplingsshallbe
28、madeofmaterialscompatiblewithmaterialsofthevesselpipingequipment,theflexible hosesandthefluidconveyed. Amaterialissaidtobecompatiblewhenitdoesnotleadtoanyviolentreaction(ignition)oranyslowreaction (detrimatalageing)thatmayoccurduringexpectedlife. Ifthespecifiedminimumtemperatureisequaltoorbelowthebo
29、ilingpointofairorthecouplingisintendedfor oxygenservicethematerialshallbeoxygencompatibleinaccordancewithEN17971. Ametallicmaterialswhichexhibitaductile/brittletransitionshallhaveminimumimpactvaluesinaccordancewith EN12521andEN12522. Metallicmaterialswhichcanbeshowntohavenoductile/brittletransitiond
30、onotrequireadditionalimpacttest. Nonmetallicmaterialsaresofarwellestablishedonlyforuseassealingmaterials.Ifsuchmaterialsaretobeused forstructuralpartstheyshallatleasthavepropertiesinaccordancewiththerequirementsabove. Theaboverequirementneednottobeappliedonprotectioncapsandplugs. Thecouplingmaterial
31、sandsolderingalloyshallcontainlessthan70%copper,ifitisspecifiedformixtures containingacetylene. Materialsshallberesistanttonormalatmosphericcorrosionandinducedstresscorrosion.EN13371:2001(E) 6 Materialsshallberobustenoughtowithstandstandardizedtestingconditionsinaccordancewith5.3. 5Prototype tests 5
32、.1General Threesamplecouplingsshallbetested.Theyshallberepresentativeofthecouplingstobeproduced. Thetestresultsshallberecordedinawrittenreportasareference. 5.2Inspection 5.2.1 Designverification Thecouplingshallbeinspectedtoensurethatitsatisfiestherequirementofclause4. 5.2.2 Dimensionofthecoupling D
33、imensionsshallbeconfirmedtobeinaccordancewiththedrawings. 5.2.3 Identificationofmaterial Certificationofallmaterialstogetherwithanyweldproceduresandweldersqualificationshallberecorded. 5.2.4Cleanliness check ItshallbecheckedthatthecouplingmeetstherequirementofEN12300. 5.3Testing 5.3.1General Couplin
34、gsshallbeassembledinaccordancewiththeoperatinginstruction. 5.3.2 Pressuretest Theassembledcouplingshallbesubjectedtoahydraulicpressuretest,atambienttemperature(2010)C,equal to1,5timesthenominalpressure.Thepressureshallbeheldforaminimumof3min.Thereshallbenovisual leaksandnovisualdeformation. Asanalte
35、rnativetothehydraulictestitisalsopermissibletoperformapneumatictest,atthesamepressure, providedthatthenecessarysafetyprecautionsaremet. 5.3.3Leak tests TheassembledcouplingsshallbeleaktestedatambientandcryogenictemperaturesandbothatPNandat 0,5bar.Theleaktestatambienttemperaturemaybebyimmersioninwate
36、r.Thetestatcryogenictemperature maybebyimmersioninacryogenicfluidbutothermethodsofequivalentorbetteraccuracyarepermitted.Thetest gasfortheambienttesttemperatureshouldbeN 2 orairandforthecryogenictestHe. Couplingswithaspecifiedminimumtemperaturenotlowerthan196Cshallbetestedatatemperaturenot greaterth
37、anthespecifiedminimumtemperature.Couplingswithadesigntemperaturelowerthan196Cshallbe testedatatemperaturenotgreaterthan196C.Adeviationinthetemperaturemeasuredof+/10%(inC)is alloweddependingonthepracticalconditionsoftesting.Ambienttemperatureshallnotexceed25Candthe humidityshallbenotlessthan40%. Thel
38、eaktestshallnotbestarteduntilthecouplinghasreacheditsstabletesttemperature.Aretighteningofthe couplingwhencoldshallbepermittedinaccordancewiththeoperatinginstructions.EN13371:2001(E) 7 Thecouplingleakageratefornonflammablefluidsforthewarmorcoldtestshallbelessthan1mbarl/sxDN (1000Nmm 3 /sxDN)andforfl
39、ammablefluids10 2 mbarl/sxDN(10Nmm 3 /sxDN). 5.3.4Strength test Theassembledcouplingsshallbehydraulicallytestedatambientconditionsatapressureof3timesPN. Leakageshallbeacceptedbutnobursting. 5.3.5Functional test Thecouplingshallbeassembledandtightenedinaccordancewiththerelevantoperatinginstructions.I
40、tshallthen bedisconnected.Eachoftheseoperationsshallberepeateduntil500cycleshavebeencompleted.Thereafter eachofthecomponentsofthecoupling,excludingseals,shallbevisuallyinspected.Grossdeformation,gross wearorcrackingshallbecauseforrejection. Iftheresultsofthevisualexaminationareambiguousthiscanbesupp
41、lementedbyaliquidpenetratetest. 6 Cleaningandpackaging CouplingsshallsatisfytherequirementsofEN12300. 7Marking Thecouplingsshallbepermanentlymarkedwiththenominalpressure(PN),fluidorfluidgroupthespecified minimumtemperatureandENnumberofthisstandard.EN13371:2001(E) 8 AnnexZA (informative) Clausesofthi
42、sEuropeanStandardaddressingessentialrequirementsor otherprovisionsofEUdirectives ThisEuropeanstandardhasbeenpreparedunderamandategiventoCENbytheEuropeanCommissionandthe EuropeanFreeTradeAssociationandsupportsessentialrequirementsofEUPressureEquipmentDirective 97/23/EC(PED). WARNING:Otherrequirements
43、andotherEUDirectivesmaybeapplicabletotheproduct(s)fallingwithinthe scopeofthisstandard. TheclausesofthisstandardgivenintableZA.1arelikelytosupportrequirementsofDirective97/23/EC. TableZA.1ComparisonbetweenthisEuropeanstandardandPED Harmonizedclauses/subclausesof thisstandard Content PED 4.1 Provisionstoensuresafehandling andoperation AnnexI2.3 4.1 Provisionsforfillinganddischarge AnnexI2.2.3b 5 Prooftest AnnexI3.2.2 Compliancewiththeclausesofthisstandardprovidesonewithmeansofconformingwiththespecificessential requirementsoftheDire
