1、BRITISH STANDARD BS EN 12257:2002 Transportable gas cylinders Seamless, hoop-wrapped composite cylinders The European Standard EN 12257:2002 has the status of a British Standard ICS 23.020.30 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS EN 12257:2002 This British Standard
2、 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 28 March 2002 BSI 28 March 2002 ISBN 0 580 38155 2 National foreword This British Standard is the official English l
3、anguage version of EN 12257:2002. The UK participation in its preparation was entrusted by Technical Committee PVE/3, Gas containers, to Subcommittee PVE/3/3, Transportable gas cylinders Cylinder design, which has the responsibility to: A list of organizations represented on this subcommittee can be
4、 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 by using the “Fi
5、nd” 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 immunity from lega
6、l 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. Summary of pages
7、 This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 37 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 E
8、UROPISCHENORM EN12257 February2002 ICS23.020.30 Englishversion TransportablegascylindersSeamless,hoopwrapped compositecylinders BouteillesgaztransportablesBouteillessanssoudure, frettescomposites OrtsbeweglicheGasflaschenNahtloseumfangsgewickelte FlaschenausVerbundwerkstoffen ThisEuropeanStandardwas
9、approvedbyCENon9November2001. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplication
10、totheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethena
11、tionalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG Managem
12、entCentre:ruedeStassart,36B1050Brussels 2002CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN12257:2002EEN12257:2002(E) 2 Contents page Foreword .3 Introduction 4 1 Scope5 2 Normativereferences 5 3 Terms,definitionsandsymbols 6 4 Designandmanufacture
13、 7 5 Cylinderandmaterialtests . .10 6 Conformityevaluation . .21 7 Marking.21 AnnexA (normative) Prototypetesting,designvarianttestingandproductiontesting .22 AnnexB (informative) Examplesoftypeapprovalandproductiontestingcertificates 33 Bibliography .37EN12257:2002(E) 3 Foreword ThisdocumentEN12257
14、2002hasbeenpreparedbyTechnicalCommitteeCEN/TC23 “Transportablegascylinders“,thesecretariatofwhichisheldbyBSI. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofan identicaltextorbyendorsement,atthelatestbyAugust2002,andconflictingnationalstandardsshall bewithdrawnatt
15、helatestbyAugust2002. ThisEuropeanStandardhasbeenpreparedunderamandategiventoCENbytheEuropean CommissionandtheEuropeanFreeTradeAssociation,andsupportstheobjectivesoftheframework DirectivesonTransportofDangerousGoods. ThisEuropeanStandardhasbeensubmittedforreferenceintotheRIDand/orthetechnicalannexes
16、 oftheADR.Thereforeinthiscontextthestandardslistedinthenormativereferencesandcovering basicrequirementsoftheRID/ADRnotaddressedwithinthepresentstandardarenormativeonly whenthestandardsthemselvesarereferredtointheRIDand/orthetechnicalannexesoftheADR. AnnexAisnormativeandannexBisinformative. According
17、totheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthe followingcountriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,Czech Republic,Denmark,Finland,France,Germany,Greece,Iceland,Ireland,Italy,Luxembourg,Malta, Netherlands,Norway,Portugal,Spain,Sweden,Switzerlandandthe
18、UnitedKingdom.EN12257:2002(E) 4 Introduction Thepurposeofthisstandardistoprovideaspecificationforthedesign,manufacture,inspectionand testingofrefillabletransportableseamless,hoopwrappedcompositecylinders. Thespecificationsgivenarebasedonknowledgeof,andexperiencewith,materials,design requirements,man
19、ufacturingprocessesandcontrolduringmanufactureofcylindersincommonusein thecountriesoftheCENmembers.EN12257:2002(E) 5 1Scope ThisEuropeanStandardspecifiesminimumrequirementsforthematerials,design,construction, prototypetestingandroutinemanufacturinginspectionsofcompositegascylinderswithawater capacit
20、yuptoandincluding450litresforcompressed,liquefiedanddissolvedgases. NOTE Forthepurposesofthisstandard,theword“cylinder”includestubesupto450litreswatercapacity. Thisstandardisapplicabletocylindersthatcompriseaseamlessmetallinerreinforcedovera substantialpartoftheparallellengthbywoundcompositefibresof
21、glass,carbon,aramid,orwire. Thisstandardisnotapplicabletogascylinderswhicharealmosttotallycoveredwithfibresand commonlycalled“fullywrapped“cylinders.ForfullywrappedcompositecylindersseeEN12245. NOTE Thespecificationdoesnotaddressthedesign,fittingandperformanceofremovableprotective sleeves.Wherethese
22、arefittedtheyshouldbeconsideredseparately. 2 Normativereferences ThisEuropeanStandardincorporatesbydatedorundatedreference,provisionsfromotherpublications. Thesenormativereferencesarecitedattheappropriateplaceinthetextandthepublicationsarelisted hereafter.Fordatedreferences,subsequentamendmentstoorr
23、evisionsofanyofthesepublications applytothisEuropeanStandardonlywhenincorporatedinitbyamendmentorrevision.Forundated referencesthelatesteditionofthepublicationreferredtoapplies(includingamendments). EN10891, TransportablegascylindersGascylinderidentification(excludingLPG) Part1:Stampmarking. EN19641
24、 TransportablegascylindersSpecificationforthedesignandconstructionofrefillable transportableseamlesssteelgascylindersofwatercapacitiesfrom0,5litreuptoandincluding150 litresPart1:CylindersmadeofseamlesssteelwithanR m value oflessthan1100MPa. prEN19642, TransportablegascylindersSpecificationforthedes
25、ignandconstructionofrefillable transportableseamlesssteelgascylindersfrom0,5litresuptoandincluding150litresPart2: Tensilestrength(R m max) 1100MPa. EN19643, TransportablegascylindersSpecificationforthedesignandconstructionofrefillable transportableseamlesssteelgascylindersofcapacityfrom0,5litresupto
26、150litresPart3: Stainlesssteelcylinders. EN1975, TransportablegascylindersSpecificationforthedesignandconstructionofrefillable transportableseamlessaluminiumandaluminiumalloygascylindersofcapacityfrom0,5lupto150l . EN100021, MetallicmaterialsTensiletestingPart1:Methodoftest(atambienttemperature) ENI
27、SO111141, TransportablegascylindersCompatibilityofcylinderandvalvematerialswithgas contentsPart1:MetallicMaterials(ISO111141:1997). ENISO11120, GasCylindersRefillableseamlesssteeltubesofwatercapacitybetween150l and3000lDesign,constructionandtesting(ISO11120:1999). ENISO13341, Transportablegascylinde
28、rsFittingofvalvestogascylinders(ISO13341:1997).EN12257:2002(E) 6 ASTMD229092, Testmethodforapparenttensilestrengthofringortubularplasticsandreinforced plasticsbysplitdiskmethod. ASTMD229183, Fabricationofringtestspecimensforglassresincomposites. ASTMD234395, Testmethodfortensilepropertiesofglassfibr
29、estrands,yarnsandrovingsusedin reinforcedplastics. ASTMD401893, Testmethodsfortensilepropertiesofcontinuousfilamentcarbonandgraphitefiber tows. 3 Terms,definitionsandsymbols ForthepurposesofthisEuropeanStandard,thefollowingterms,definitionsandsymbolsapply. 3.1Termsanddefinitions 3.1.1 ambienttempera
30、ture temperatureofsurroundingsvaryingbetween10Cand35C(fortestpurposesonly) 3.1.2 autofrettage pressureapplicationprocedurewhichstrainsthemetallinerpastitsyieldpointsufficientlytocause permanentplasticdeformation,andresultsinthelinerhavingcompressivestressesandthefibres havingtensilestressesinternall
31、ywhenatzerointernalgaugepressure 3.1.3 batch,(offibres,wiresorcomponentsoftheresinsystem) homogeneousquantityofmaterial,identifiedandcertifiedassuchbythesupplier 3.1.4 batch,(ofmetallicliners) quantityoflinersofthesamenominaldiameter,thickness,lengthanddesign,madesuccessivelyfrom thesamematerialcast
32、andsubjectedtothesameheattreatmentforthesamelengthoftime 3.1.5 batch, (offinishedcylinderswithliners) quantityofupto200finishedcylindersplusfinishedcylindersrequiredfordestructivetesting,ofthe samenominaldiameter,thickness,lengthanddesign.Thebatchmaycontaindifferentbatchesof liners(providingthebatch
33、esarenominallythesameandhavehadthesametreatments),fibresand matrixmaterials 3.1.6 burstpressure highestpressurereachedinacylinderorlinerduringtherelevantbursttest 3.1.7 compositeoverwrap fibresandmatrixtakentogetherasacombinedunit,orwirereinforcement 3.1.8 exteriorcoating layerofclearorpigmentedmate
34、rialappliedtothecylinderforprotectionorforcosmeticpurposesEN12257:2002(E) 7 3.1.9 fibreorstrand loadcarryingpartofthecompositeoverwrape.g.glass,aramidorcarbon 3.1.10 hoopwrappedcylinder cylinderwithcompositeoverwrapalongthecylindricalportion ofthelinerwhichcarriespartofthe circumferentialstress 3.1.
35、11 liner metalliccylinderthatcontainsthegasandprovidesasubstantialstructuralstrengthtothecomposite cylinder 3.1.12 matrix materialwhichisusedtobindandholdthefibresinplace 3.1.13 rejectedcylinder cylinderwhichinitspresentconditionhasnotpassedthetestrequirements 3.1.14 wirereinforcement loadcarryingov
36、erwrap,usingametallicwire(e.g.steel),thatdoesnotrequireamatrix 3.2Symbols p b actualburstpressureofcomposite cylinder,inbar 1) aboveatmosphericpressure p bL burstpressureofliner,inbar 1) aboveatmosphericpressure p bmin minimumburstpressureofcompositecylinderobtainedduringdesignvarianttesting,inbar 1
37、) aboveatmosphericpressure p h hydraulictestpressureofcompositecylinder,inbar 1) aboveatmosphericpressure 4 Designandmanufacture 4.1General 4.1.1 Ahoopwrappedcompositegascylindershallcomprisethefollowingparts: Aninternalmetalliner,whichcarriesthetotallongitudinalloadandasubstantialcircumferential lo
38、ad;andeither acompositeoverwrapformedbylayersofcontinuousfibresinamatrix;or wire reinforcement. Anoptionalexteriorcoatingtoprovideexternalprotection.Whenthisisanintegralpartofthe designitshallbepermanent. 1) 1bar=10 5 Pa=0,1MPa.EN12257:2002(E) 8 Thecylindercanalsoincludeadditionalpartssuchasrings,ba
39、ses,etc. 4.1.2 Cylindersshallbedesignedwithoneortwoopeningsalongthecentralaxisonly. 4.2Liner 4.2.1Liner materials ThelinersshallbemanufacturedinaccordancewiththerelevantsectionsofthefollowingEuropean standards: a) seamlesssteelliners: EN19641orprEN19642asappropriate; b) seamlessstainlesssteelliners:
40、 EN19643; c) seamlessaluminiumalloyliners: EN1975; d) steeltubes(i.e.150l): ENISO11120. Therelevantsectionsare:materials,thermaltreatments,neckdesign,constructionandworkmanship, mechanicaltests. NOTE Thisexcludesthedesignrequirements,sincethesearespecifiedbythemanufacturerforthedesign ofthecomposite
41、cylinder.Forlinerswithwatercapacityabove150lmanufacturedofstainlesssteeloraluminium alloytherelevantsectionsoftheappropriatestandardalsoapply. Thelinermaterialshallbecompatiblewiththegasesintendedtobeusedasdeterminedby ENISO111141. 4.2.2 Designdrawing Afullydimensioneddrawingofthelinershallbesupplie
42、dwhichincludesthespecificationofthe materialandmaterialproperties.Thefollowingmaterialpropertiesshallbespecified: minimum yield stress; minimumtensilestrength; minimum elongation; minimumburstpressure; compatibilitywiththecontainedgasasdeterminedbyENISO111141. 4.2.3 Designofends(headsandbases) Thede
43、signoftheendsshallbeinaccordancewiththegeneralrequirementsoftherelevantcylinder standard(asidentifiedin4.2.1).Inordertoachievesatisfactorystressdistribution,thelinerwall thicknessshallincreaseprogressivelyinthetransitionzonebetweenthecylindricalshellandthe ends,particularlythebase. Theexternaldiameterandthicknessoftheformedneckendofthelinershallbedesignedto withstandthetorqueappliedinfittingthevalvetothecylinder,andthetestsspecifiedinTestNo12 (see5.2.12)andTestNo13(see5.2.13).EN12257:2002(E) 9 4.2.4Neck ring Whenaneckringisprovided,itshallbeofamaterialcompatible
