1、BRITISH STANDARD BS EN 13787:2001 Elastomers for gas pressure regulators and associated safety devices for inlet pressures up to 100 bar The European Standard EN 13787:2001 has the status of a British Standard ICS 23.040.80 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS EN
2、13787:2001 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 30 November 2001 BSI 30 November 2001 ISBN 0 580 36790 8 National foreword This Brit
3、ish Standard is the official English language version of EN 13787:2001. The UK participation in its preparation was entrusted to Technical Committee GSE/32, Gas governors, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secreta
4、ry. 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 “Find” facility of the BSI Standards E
5、lectronic 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 legal obligations. aid enquirers to und
6、erstand 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 This document comprises a front co
7、ver, an inside front cover, the EN title page, pages 2 to 10, 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 CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM
8、 EN13787 October2001 ICS83.060;83.140.50 Englishversion Elastomersforgaspressureregulatorsandassociatedsafety devicesforinletpressuresupto100bar Elastomrespourrgulateursdepressiondegazet dispositifsdescuritassocispourpressionsamont jusqu100bar ElastomerefrGasDruckregelgerteundzugehrige Sicherheitsei
9、nrichtungenfrEingangsdrckebis100bar ThisEuropeanStandardwasapprovedbyCENon15September2000. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferenc
10、esconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCent
11、rehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Iceland,Ireland,Italy,Luxembourg,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUR
12、OPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2001CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN13787:2001EEN13787:2001(E) 2 Contents Page Foreword3 1 Scope 4 2 Normativereferences 4 3 Termsanddefin
13、itions. .4 4 Characteristics .5 4.1 Generalrequirements 5 4.2 Additionalcharacteristics .6 5 Testmethodsforgeneralrequirements . .7 5.1 Generalconditionsoftesting . 7 5.2 Hardness.7 5.3 Tensilestrengthandelongationatbreak 7 5.4 Compressionset. .7 5.5 Resistancetoageing .7 5.6 Resistancetogas . .7 5.
14、7 Resistancetolubricants .7 AnnexA (informative) Additionalcharacteristics . .8 A.1 General8 A.2 Resistancetoozone . .8 A.3 Resistancetoabrasion 8 A.4 Resistancetotear 8 AnnexB (normative) Specialnationalconditions .9 B.1 Specialnationalconditions . .9 B.2 SpecialnationalconditionforSweden. .9 Bibli
15、ography 10EN13787:2001(E) 3 Foreword ThisEuropeanStandardhasbeenpreparedbyTechnicalCommitteeCEN/TC235“Gaspressureregulatorsand associatedsafetydevicesforuseingastransmissionanddistribution“,thesecretariatofwhichisheldbyUNI. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublica
16、tionofanidenticaltextor byendorsement,atthelatestbyApril2002,andconflictingnationalstandardsshallbewithdrawnatthelatestby April2002. ThisEuropeanStandardincludesoneinformativeannex(AnnexA)andonenormativeannex(AnnexBrelatedtoa specialnationalconditionforSweden). AccordingtotheCEN/CENELECInternalRegul
17、ations,thenationalstandardsorganizationsofthefollowing countriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,CzechRepublic,Denmark,Finland, France,Germany,Greece,Iceland,Ireland,Italy,Luxembourg,Netherlands,Norway,Portugal,Spain,Sweden, SwitzerlandandtheUnitedKingdom.EN13787:2001(E) 4 1Sc
18、ope ThisEuropeanStandardspecifiestheminimumrequirementsforelastomericmaterialsintendedtobeusedas staticseals,dynamicsealsordiaphragmsinthegaspressureregulatorscoveredbyEN334andinthesafety devicesforgaspressureregulatingstationsandinstallationscoveredbythecorrespondingEuropeanStandards, aswellasthere
19、levanttestmethodstoassesstheserequirements. ThisEuropeanStandardappliestoelastomericmaterialsforusewithgasesofthefirstandsecondgasfamiliesto EN437,forinletpressureslessthanorequalto100bar,andinanoperatingtemperaturerangebetween10C, (or20Cwhenapplicable),and+60C. ThisEuropeanStandardalsogivessomeaddi
20、tionalcharacteristicsandrecommendationsfortheirapplicationlikely toberequestedforelastomersintheorderspecifications,andthecorrespondingtestmethods(seeinformative AnnexA). ThisEuropeanStandardonlyappliesfortypetesting. 2 Normativereferences ThisEuropeanStandardincorporatesbydatedorundatedreference,pr
21、ovisionsfromotherpublications.These normativereferencesarecitedattheappropriateplacesinthetextandthepublicationsarelistedhereafter.For datedreferences,subsequentamendmentstoorrevisionsofanyofthesepublicationsapplytothisEuropean Standardonlywhenincorporatedinitbyamendmentorrevision.Forundatedreferenc
22、esthelatesteditionofthe publicationreferredtoapplies(includingamendments). EN334, Gaspressureregulatorsforinletpressuresupto100bar. EN437, TestgasesTestpressuresAppliancecategories. EN549, Rubbermaterialsforsealsanddiaphragmsforgasappliancesandgasequipment. ISO37, RubbervulcanizedorthermoplasticDete
23、rminationoftensilestressstrainproperties. ISO48, Rubber,vulcanizedorthermoplasticDeterminationofhardness(hardnessbetween10IRHDand 100IRHD). ISO188, Rubber,vulcanizedorthermoplasticAcceleratedageingandheatresistancetests. ISO815,Rubber,vulcanizedorthermoplasticDeterminationofcompressionsetatambient,e
24、levatedorlow temperatures. ISO1817, Rubber,vulcanizedDeterminationoftheeffectofliquids. 3 Termsanddefinitions ForthepurposesofthisEuropeanStandard,thefollowingdefinitionsapply: 3.1 staticseal componentwhichensuresasealbetweentwopartsofagaspressureregulatororpartsofitsassociatedsafety deviceswhichdon
25、othaverelativemovement(Orings,sheetgaskets,etc.) NOTE AdaptedfromEN549.EN13787:2001(E) 5 3.2 dynamicseal componentwhichensuresasealbetweentwopartsofagaspressureregulatororpartsofitsassociatedsafety deviceswhichhaverelativemovement(lipseals,someOrings) NOTE AdaptedfromEN549. 3.3 diaphragms 3.3.1 diap
26、hragm membraneofrubbermateriallocatedinafixtureandservingasaflexiblegastightpartitionbetweentwochambers EN549 3.3.2 maindiaphragm diaphragm,thefunctionofwhichistodetectthefeedbackofthecontrolledvariableand/orthediaphragmwhich providesthethrusttomovethecontrolmember EN334 3.3.3 controlmember movablep
27、artoftheregulatorwhichispositionedintheflowpathtorestricttheflowthroughtheregulator.Acontrol membermaybeaplug,ball,disk,vane,gate,diaphragm,etc. EN334 3.4 seatring partassembledinacomponentoftheregulatortoprovidearemovablesoftseat EN334 4Characteristics 4.1 Generalrequirements Elastomericmaterialsus
28、edfornonreinforceddiaphragmsandstaticanddynamicseals,shallconformtothe requiredvaluesandtolerancesgiveninTable1.Testmethodsaredetailedinclause5. Allmaterialsshallbefreefromporosity,inclusion,blistersandsurfaceimperfectionsvisibletothenakedeye.EN13787:2001(E) 6 Table1Requirementsofelastomersforsealsa
29、nddiaphragms Property Units HardnessClass 50 60 70 80 90 Hardness Tolerancesonstatednominalhardness IRHD 5 5 5 5 +3/ 5 Tensilestrength ,minimum MPa 6 9 9 10 10 Elongationatbreak ,minimum % 400 300 200 150 80 Compressionset a at70C,after24h whereapplicable, at10Cafter24hor at20Cafter24h % % 25 40 50
30、25 40 50 25 40 50 25 40 50 25 40 50 Resistancetoageing Changeinhardness Changeintensilestrength Changeinelongationatbreak IRHD % % 10 15 +10/ 25 10 15 +10/ 25 10 15 +10/ 25 8 15 +10/ 25 6 15 +10/ 25 Resistancetogas(npentane) Changeinmassafterimmersion (72h,23C) Changeinmassafterdrying (168h,40C),max
31、imum % % +10/ 5 +5/ 10 +10/ 5 +5/ 10 +10/ 5 +5/ 10 +10/ 5 +5/ 8 +10/ 5 +5/ 8 Resistancetolubricants Oil IRM902,168hat70C Changeinhardness Changeinmass IRHD % 10 +15/ 10 10 +15/ 10 10 +15/ 10 10 +15/ 10 10 +15/ 10 a Whenthediaphragmhasafunctionofdetection,thistestisnotapplicable(see4.2.2). Materialsu
32、sedforreinforceddiaphragmsshouldmeettherequirementsofTable1.Moreover,specificadditional testsmaybenecessary. 4.2 Additionalcharacteristics 4.2.1 Therequirementsgivenin4.1areintendedforgeneraluse,however,forsomeapplications,particularly withregardtothedesignoftheregulatororthesafetydevice,andaccordin
33、gtotheprovisionsoftheorder specification,additionalcharacteristicsmaybeaskedfor. Fortestingtheseadditionalcharacteristics,thetestmethodsgivenininformativeAnnexAshouldbeused,taking intoaccounttestconditionsandassessmentcriteriasetupintheorderspecification. Forsuchadditionalcharacteristics,the4.2.2to4
34、.2.4shouldbeconsidered. 4.2.2 Forpartsincontactwiththeatmosphere,undernormalconditionsofuse,elastomersresistanttoozone shouldbeused.Inparticular,thischaracteristicshouldbetakenintoaccountwhenthediaphragmhasafunctionof detection. 4.2.3 Wherethediaphragmisusedasasensingsystem,compressionsetisnotconsid
35、eredtoberelevantand shouldbereplacedbyatypetestintheregulatorstandardEN334orintheappropriateENstandardforsafety devices,asapplicable. 4.2.4 ForseatringsthevaluesarethesameasinTable1,butadditionaltestssuchastearstrengthand abrasioncouldbeintroducedasquotedininformativeAnnexA.EN13787:2001(E) 7 5 Testm
36、ethodsforgeneralrequirements 5.1 Generalconditionsoftesting Unlessotherwisespecified,testsarecarriedoutatatemperatureof(232)C. 5.2Hardness ThehardnessismeasuredbyIRHD,preferablyaccordingtothemicrotestmethodspecifiedinISO48. 5.3 Tensilestrengthandelongationatbreak Tensilestrengthandelongationatbreaka
37、remeasuredaccordingtoISO37andexpressedinMPaandpercentage respectively.Thetestisperformedpreferablyondumbbelltestpiecesoftype2. 5.4Compression set TestsarecarriedoutaccordingtoISO815(typeBtestpiece)underthefollowingconditions: athightemperature:after24hat70C; atlowtemperature:after24hat10Cor20C. 5.5
38、Resistancetoageing Changesinhardness,tensilestrength,elongationatbreakaremeasuredto5.2and5.3respectivelyafterageingin accordancetoISO188,atatemperatureof70Cfor168h(7days). 5.6 Resistancetogas Resistancetogasismeasuredinpercentageofchangeinmassafterimmersioninnpentane(72 0 2 )hat (23 2)C,andafterdryi
39、ng(168 0 2 )hat40C,accordingtothetestmethodgiveninISO1817. 5.7 Resistancetolubricants ResistancetolubricantsismeasuredaccordingtothetestmethodgiveninISO1817,underthefollowingspecific conditions: immersion during (168 0 2 )hinoilIRM902at70C; changesinmassandhardnessaredeterminedwithreferencetotheinit
40、ialmassandhardnessofthesamples.EN13787:2001(E) 8 AnnexA (informative) Additionalcharacteristics A.1General Inordertomeetsomespecialprovisionsoftheorderspecifications,inparticularforspecificapplicationsasstated in4.2,elastomermaterialsshouldhaveadditionalspecificcharacteristicsofresistancetoozone,res
41、istanceto abrasionorresistancetotear. Thecorrespondinglimitvaluesandparticulartestconditions,ifapplicable,aredefinedintheorderspecifications. Unlessotherwisespecified,thetestmethodsgiveninA.2toA.4shouldbeapplied. A.2 Resistancetoozone Whereapplicable,resistancetoozoneismeasuredaccordingthetestmethod
42、giveninISO14311,withthe followingtestcriteria: ozoneconcentration: (25 5)pphm temperature: (40 2)C exposuretime: 0 2 48 h relativehumidity: (55 10)% elongation: (20 2)%forhardnessclasses50,60and70; (15 2)%forhardnessclass80; (10 1)%forhardnessclass90; viewwith7foldmagnification; assessment:nocracks.
43、 A.3 Resistancetoabrasion TherelevanttestmethodisspecifiedinISO4649,methodA. A.4 Resistancetotear TherelevanttestmethodisspecifiedinISO341,methodB,procedurea).EN13787:2001(E) 9 AnnexB (normative) Specialnationalconditions B.1 Specialnationalconditions Nationalcharacteristicorpracticethatcannotbechangedevenoveralongperiod,e.g.climaticconditions, electricalearthingconditions.Ifitaffectsharmonization,itformspartoftheEuropeanStandardorHarmonization Docume
