BS EN 3275-2002 Aerospace series - Pipe coupling 8 30 up to 28000 kPa - Dynamic beam seal - Metric series - Technical specification《航空航天系列 高达28000kPa的管连接 8 0 动态横梁密封 米制系列 技术规范》.pdf

《BS EN 3275-2002 Aerospace series - Pipe coupling 8 30 up to 28000 kPa - Dynamic beam seal - Metric series - Technical specification《航空航天系列 高达28000kPa的管连接 8 0 动态横梁密封 米制系列 技术规范》.pdf》由会员分享，可在线阅读，更多相关《BS EN 3275-2002 Aerospace series - Pipe coupling 8 30 up to 28000 kPa - Dynamic beam seal - Metric series - Technical specification《航空航天系列 高达28000kPa的管连接 8 0 动态横梁密封 米制系列 技术规范》.pdf（32页珍藏版）》请在麦多课文档分享上搜索。

1、BRITISH STANDARD AEROSPACE SERIES BS EN 3275:2002 Pipe coupling 8 30 up to 28 000 kPa Dynamic beam seal Metric series Technical specification The European Standard EN 3275:2002 has the status of a British Standard ICS 49.080 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS EN

2、 3275:2002 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 10 May 2002 BSI 10 May 2002 ISBN 0 580 37650 8 National foreword This British Standa

3、rd is the official English language version of EN 3275:2002. The UK participation in its preparation was entrusted to Technical Committee ACE/12/1, Aerospace fasteners, fastening systems, details and parts (International), which has the responsibility to: A list of organizations represented on this

4、committee can be obtained 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 Standards Catalogue under the section entitled “International Standards Correspondence Index”, or

5、by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport 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 im

6、munity from legal obligations. aid enquirers to understand the text; present to the responsible 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 the UK.

7、Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 28, 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. Date Com

8、ments !“# “#$%“8+“$“$+#9 % +$+“+ “%#3+#0#!+ #“ $ +$3$3+ “+$+#0$+#$+$3$39+ #+$-$+“$+#Austria,Belgium,CzechRepublic,Denmark,Finland, France,Germany,Greece,Iceland,Ireland,ItalyLuxembourg,Malta,Netherlands,Norway,Portugal,Spain, Sweden,SwitzerlandandUnitedKingdom. 3EN3275:2002(E) 1Scope IIand III accor

9、ding toISO6771andnominalpressureupto28000kPa. 2Normativereferences ThisEuropeanStandardincorporatesbydatedorundatedreferenceprovisionsfromotherpublications.These normativereferencesarecitedattheappropriateplacesinthetextandthepublicationsarelistedhereafter.For datedreferences,subsequentamendmentstoo

10、rrevisionsofanyofthesepublicationsapplytothisEuropean Standardonlywhenincorporatedinitbyamendmentorrevision.Forundatedreferences,thelatesteditionofthe publicationreferredtoapplies(includingamendments). ISO468, SurfaceroughnessParameters,theirvaluesandgeneralrulesforspecifyingrequirements. ISO2685, A

11、ircraftEnvironmentaltestprocedureforairborneequipmentResistancetofireindesignatedfire zones. ISO28591, SamplingproceduresforinspectionbyattributesPart1:Samplingschemesindexedbyacceptance qualitylimit(AQL)forlotbylotinspection. ISO6771, AerospaceFluidsystemsandcomponentsPressureandtemperatureclassifi

12、cations. ISO6772, AerospaceFluidsystemsImpulsetestingofhydraulichose,tubingandfittingassemblies. ISO7137, AircraftEnvironmentalconditionsandtestproceduresforairborneequipment. ISO7257, AircraftHydraulictubingjointsandfittingsRotaryflexuretest. ISO86251, AerospaceFluidsystemsVocabularyPart1:Generalte

13、rmsanddefinitionsrelatingto pressure. ISO9538, AerospaceHydraulictubingjointsandfittingsPlanarflexuretest. EN2813, AerospaceseriesAluminiumalloyALP6061T6Drawntubeforpressureapplications0,6mm a 12,5mm. 1 ) EN3042, AerospaceseriesQualityassuranceENaerospaceproductsQualificationprocedure. EN3120, Aeros

14、paceseriesTitaniumalloyTIP64003ColdworkedandstressrelievedSeamlesstubefor pressuresystems4mm D 51mm690MPa R m 1030MPa. 1 ) EN10204, MetallicproductsTypesofinspectiondocuments. TR2674, AerospaceseriesDesignandconstructionofpipelinesforfluidsinliquidorgaseousconditionRigid lines,installation. 2 ) MILH

15、5606, Hydraulicfluid,PetroleumBase,Aircraft,MissileandOrdnance. 3 ) MILH8446, Hydraulicfluid,NonpetroleumBase,Aircraft. 3 ) 1 )PublishedasAECMAPrestandardatthedateofpublicationofthisstandard 2 )PublishedasAECMATechnicalReportatthedateofpublicationofthisstandard 3 )Publishedby:DepartmentofDefense(DoD

16、),thePentagon,Washington,D.C.20301. 4EN3275:2002(E) 3Symbols A Elongation,inpercent D 0 Actualoutsidediameterofpipe,inmillimetres D 1 Actualinsidediameterofpipe,inmillimetres DN Nominaloutsidediameterofpipe P Workingpressure,inmegapascals R m Tensilestrength,inmegapascals R p0,2 0,2%proofstress,inme

17、gapascals s x Axialstressduetopressure,inmegapascals 4Termsanddefinitions Forthepurposesofthisstandard,thefollowingtermsanddefinitionsapply: 4.1Pressure Nominalpressure,proofpressure,impulsepressure,burstpressureaccordingtoISO86251. 4.2Coupling 4.2.1 Couplingassembly assembledandtorquetightenednut,f

18、erruleandpipematingwithe.g.unions,teesorelbows(Seefigure1) Key 1 Dynamicbeamseal 2 Ferrule 3N u t 4 Unionend Figure1Exampleofcouplingassembly 4.2.2 Straightcoupling unionconnectingpipetopipe 5EN3275:2002(E) 4.2.3 Forgedparts;shapedparts couplingsmachinedoutofindividualforgingblanks.Forcrosses,teesan

19、delbowsmachinedoutofbarorplatestock theterm“shaped“maybeused 4.3Surfacedefects 4.3.1 Surfaceirregularity nonconformitywithgeneralsurfaceappearance,possibledefect 4.3.2 Crack clean(crystalline)fracturepassingthroughoracrossthegrainboundariesthatpossiblyfollowsinclusionsofforeign elements.Cracksarenor

20、mallycausedbyoverstressingthemetalduringforgingorotherformingoperations,or duringheattreatment.Wherepartsaresubjecttosignificantreheating,cracksareusuallydiscolouredbyscale 4.3.3 Fold doublingoverofmetal,whichcanoccurduringtheforgingoperation.Foldscanoccuratorneartheintersectionof diameterchangesand

21、areespeciallyprevalentwithnoncircularnecks,shouldersandheads 4.3.4 Lap foldlikemachiningdefect 4.3.5 Seam (1) usuallyasurfaceopeningorcrackresultingfromadefectobtainedduringcastingorforging (2) extraneousmaterial,stringerinthematerial,whichisnothomogeneouswithbasemetal 4.3.6 Pit voidorholeinthesurfa

22、ceascaused,forexample,bycorrosion 4.4Qualityassurance 4.4.1 Productionbatch adefinitequantityofsomecommodityorserviceproducedatonetimeunderconditionsthatarepresumeduniform 4.4.2 Deliverybatch batchconsistingofcouplingswiththesameidentityblockwhichmaycomefromdifferentproductionbatches. 4.4.3 Acceptab

23、lequalitylevel(AQL) whenacontinuingseriesoflotsisconsidered,aqualitylevelwhichforthepurposesofsamplinginspectionisthe limitofasatisfactoryprocessaverage 6EN3275:2002(E) 4.4.4 Qualification testingrequiredtodemonstratesuccessfulperformanceofthecouplingassemblyinsimulatedservice(overload, destructivea

24、ndfatiguetests) 4.4.5 Majordefect adefectotherthancritical,thatislikelytoresultinafailureortoreducemateriallytheusabilityoftheconsidered productforitsintendedpurpose 4.4.6 Minordefect adefectthatisnotlikelytoreducemateriallytheusabilityoftheconsideredproductforitsintendedpurpose,orthat isadeparturef

25、romestablishedspecificationhavinglittlebearingontheeffectiveuseoroperationofthisproduct 5Requirements,inspectionandtestmethods Seetable1andtable2. 5.1Testconditionsandpreparationofspecimensforqualification Testsfluids. Unlessotherwisespecified,testsshallbecarriedoutusinge.g.apetroleumbasehydraulicfl

26、uidto MILH5606forcouplingassembliesoftype IItemperaturerangeandasilicateesterbasehydraulicfluidto MILH8446forthoseoftype IIItemperaturerange.Watermaybeused,wheneverpractical,forproof,burst,stress corrosionandreusecapabilitytesting.Forotherthanhydraulicsystemapplications,itispreferabletousesystem flu

27、idforleakage(gaseouspressure)andprooftesting.Whenspecifiedinthetestmethod,thetestfluidisusedas alubricant. Specimenpreparation. Shapedpartsshallbemachinedwiththegrainflowofthebarorplateinthedirectionof thefluid.Specimensshallbeassembledasillustratedintable2.Installationsonthepipeendshallbeinaccordan

28、ce withTR2674.Priortotesting,allcouplingsshallbeassembledusingthemaximumspecifiedtorque.Except,when specifiedintable2,thecouplingshallbeassembledusingtheminimuminstallationtorqueforatleasthalfofthe specimens,andmaximumtorquesfortheremainder. Pipeassembly. Themethodofjoiningthepipetothecouplingend(br

29、azing,welding,mechanicalattachment,etc.) shallnotbedetrimentaltotheproperties,strengthorgeometryofthepipeandthecouplingend.Thejointshallbe inaccordancewiththedesigninstructionsandshallbeinspectedbydirectmeasurement,Xrayorothernon destructivemethods. 7EN3275:2002(E) Table1Requirements,inspectionandte

30、stmethods Clause Characteristic Requirement Inspectionandtestmethod Q a A a 5.2 b Materials Conformitywiththeproduct standards Chemicalanalysisorcertificateof compliancetoEN10204issuedby thesemifinishedproduct manufacturer. X 100% X 100% 5.3 b Dimensions Fluidpassages Conformitywiththeproduct standa

31、rds Conformitywiththeproduct standards Suitablemeasuringinstruments Aballwithadiameter0,5mmless thantheminimumdiameterspeci fiedforthepassageshallpass throughthecoupling. X 100% X 100% X 50% X 20% 5.4 b Product identification Markingaccordingto productstandardsand definitiondocuments includingbatchi

32、dentification ofAnnexA.Itshallbe legibleandshallnot adverselyaffectthematerial orthefunctioningofthe products. Visualexamination X 100% X 100% 5.5 b Surface roughness Conformitywiththeproduct standards Interpretedinaccordance withISO468 Suitablemeasuringinstrumentsor visualtactilesamples X 100% X 10

33、0% 5.6 b Surface treatment Conformitywiththeproduct standards Visualexamination Thethreadshallbetestedusinga gaugewithatoleranceclassof 4h6h. X 100% X 100% 5.7 b Surfacedefects Threads Partsshallbefreefrom surfacedefectsindicatedin 4.3liabletohavean adverseaffectontheircha racteristicsandendurance.

34、Threadsmaybecut,rolled orground,excepttitanium alloyswhichshallbecutor rolled.Theexternalthreads ofcouplingsshouldbe rolledand,ifmachined, shallhaveanarithmetical meandeviation, R a ,ofthe profileof3,2mor smootherinaccordance withISO468. Thegrainflowinrolled threadsshallbecontinuous andfollowthegene

35、ral threadcontourwiththe maximumdensityatthe threadroot. Visualinspectionusingsuitableme thods Visualexamination Threadflanksinrolledthreadsshall beexaminedbymicroexamination. Specimensshallbetakenfromthe finishedpartbysectioningona longitudinalplaneacrossthe threadedarea.Thespecimensshall bepolishe

36、dandetchedtoreveal thesurfacedefects. X 100% X 100% X 10% X 100% X 100% X 5% 8EN3275:2002(E) Table1 (continued) Clause Characteristic Requirement Inspectionandtestmethod Q a A a 5.7 (con tinued) Laps,cracks,surface irregularitiesandseams (see4.3)arenot acceptableonanypartof thepressurethreadflank,in

37、 thethreadrootoronthe nonpressurethreadflank. Lapsandseams,depthsof whicharewithinthelimits oftable,areacceptableon thecrestandthenon pressurethreadflankabove thepitchdiameter. DN Depth mm 05 06 08 10 12 14to32 0,15 0,18 0,18 0,20 0,23 0,25 5.8 Proofpressure Thecouplingassembly shallwithstandapressu

38、re equaltotwicethenominal pressureofthefluidsystem for5minatambient temperaturewithout leakageandshallnotshow anyevidenceofpermanent deformationorothermal functionwhenusingthe specifiedtorquevalues. Thecouplingassemblyshallbe connectedtoapressuresource withoneendfreetomove. Rateofpressureincreasesha

39、llbe (15000037500)kPa/min. X 5.9 Gaseous pressure Thecouplingassembly shallwithstandagaseous pressureequaltothe nominalpressurefor5min, atambienttemperature. Thereshallbenovisible formationofbubblesafter 1minatpressureorother malfunctionthatwould affectassemblyor disassemblywhenusingthe torquevalues

40、specified. Thecouplingassemblyshallbe solventcleanedandairdriedprior totesting.Itshallbeassembledand tightenedtotheminimumtorques specifiedintable3.Itshallthenbe pressurizedwithnitrogentothe nominalpressure.Thispressure shallbemaintainedfor5minwhile thespecimensareimmersedin waterorsuitableoil(seefigure2). X 9