1、BRITISH STANDARD BS EN 1759-4:2003 Flanges and their joint Circular flanges for pipes, valves, fittings and accessories, class designated Part 4: Aluminium alloy flanges The European Standard EN 1759-4:2003 has the status of a British Standard ICS 23.040.60 BS EN 1759-4:2003 This British Standard, w
2、as published under the authority of the Standards Policy and Strategy Committee on 1 October 2003 BSI 1 October 2003 ISBN 0 580 42684 X National foreword This British Standard is the official English language version of EN 1759-4:2003. The UK participation in its preparation was entrusted to Technic
3、al Committee PSE/15, Flanges, 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 implement international or European publications referred to in this document may be found in
4、 the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility 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 are responsib
5、le for its 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 international/European committee any enquiries on the interpretation, or proposals for change, and keep the U
6、K 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 16, an inside back cover and a back cover. The BSI copyright notice displayed in t
7、his document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN17594 September2003 ICS23.040.60 Englishversion FlangesandtheirjointCircularflangesforpipes,valves, fittingsandaccessories,classdesigna
8、tedPart4:Aluminium alloyflanges BridesetleursassemblagesBridescirculairespourtubes, appareilsderobinetterie,raccordsetaccessoires, dsignesClassPartie4:Bridesenalliagesdaluminium FlanscheundihreVerbindungenRundeFlanschefr Rohre,Armaturen,FormstckeundZubehrteile,nach ClassbezeichnetTeil4:Flanscheaus A
9、luminiumlegierungen ThisEuropeanStandardwasapprovedbyCENon10July2003. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnati
10、onal standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusast
11、he official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Slovakia,Spain,Sweden,SwitzerlandandUn ited Kingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMI
12、TEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2003CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN17594:2003EEN17594:2003(E) 2 Contents Page Foreword3 1 Scope 4 2 Normativereferences 4 3 Termsandd
13、efinitions. .4 4 Designations.5 4.1 Rangeofnominalsizes .5 4.2 RangeofClassdesignations. .5 4.3 Typesofflanges .5 4.4 Designationofflanges 5 5 Generalrequirements 6 5.1 Flangematerials .6 5.2 Repairs6 5.3 Bolting.6 5.4 Gaskets .6 5.5 Pressure/temperature(p/T)ratings 6 5.6 Dimensions.6 5.7 Flangefaci
14、ngs 7 5.7.1 Typesofjointingfaces . .7 5.7.2 Jointingfacefinish 7 5.8 Spotfacingandbackfacingofflanges .7 5.9 Tolerances 7 5.10 Marking .7 AnnexA (informative) Massesofflanges . 14 AnnexB (informative) Comparisonofmetricboltingtoimperialbolting15 AnnexZA (informative) RelationshipbetweenthisEuropeanS
15、tandardandtheEssentialRequirements ofEUDirective97/23/EC . 16EN17594:2003(E) 3 Foreword Thisdocument(EN17594:2003)hasbeenpreparedbyTechnicalCommitteeCEN/TC74“Flangesandtheirjoints“ thesecretariatofwhichisheldbyDIN. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofani
16、denticaltextor byendorsement,atthelatestbyMarch2004,andconflictingnationalstandardsshallbewithdrawnatthelatestby March2004. ThisdocumenthasbeenpreparedunderamandategiventoCENbytheEuropeanCommissionandtheEuropean FreeTradeAssociation,andsupportsessentialrequirementsofthePressureEquipmentDirective(PED
17、) 1) . ForrelationshipwithEUDirective(s),seeinformativeannexZA,whichisanintegralpartofthisstandard. EN1759consistsofthefollowingparts: Part1:Steelflanges(draftstage); Part3:Copperalloyflanges(draftstage); Part4:Aluminiumalloyflanges Thematingdimensionsoftheflangesofthisstandardarecompatiblewiththose
18、flangesofothermaterialsinac cordancewiththeotherpartsofEN 1759andwiththoseflangesofISO7005. AnnexesAandBareinformative. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowingcoun triesareboundtoimplementthisEuropeanStandard:Austria,Belgium,CzechRepublic,Denmark,
19、Finland, France,Germany,Greece,Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal, Slovakia,Spain,Sweden,SwitzerlandandtheUnitedKingdom. 1) Directive97/23ECoftheEuropeanParliamentandoftheCouncilof29May1997ontheapproximationoftheLawsofthe MemberStatesconcerningpressureequipmen
20、t;OIECL181.EN17594:2003(E) 4 1Scope ThisEuropeanstandardspecifiesrequirementsforClassdesignatedcircularflangesforpipes,valves,fittingsand accessoriesmadefromaluminiumalloyintherangeofDN15toDN600(NPS1/2toNPS24)andClass150to Class300(seeTable1). Thisstandardspecifiesthetypesofflangesandtheirfacings,di
21、mensionsandtolerances,boltsizes,surfacefinish ofjointingfaces,markingandmaterialstogetherwithassociatedpressuretemperature(p/T)ratings. Theflangesareintendedtobeusedforpipingaswellasforpressurevessels. 2 Normativereferences ThisEuropeanStandardincorporates,bydatedorundatedreferenceprovisionsfromothe
22、rpublications.These normativereferencesarecitedattheappropriateplacesinthetextandthepublicationsarelistedhereafter.Fordated references,subsequentamendmentstoorrevisionsofanyofthesepublicationsapplytothisEuropeanStandardonly whenincorporatedinitbyamendmentorrevision.Forundatedreferences,thelatestedit
23、ionofthepublicationreferred toapplies(includingamendments). EN15151, FlangesandtheirjointsBoltingPart1:Selectionofbolting. EN12392, AluminiumandaluminiumalloysWroughtproductsSpecialrequirementsforproductsintendedfor theproductionofpressureequipment. EN12560, FlangesandtheirjointsGasketsforClassdesig
24、natedflanges(indifferentparts) ENISO4287:1998, Geometricalproductspecification(GPS)Surfacetexture:ProfilemethodTerms,defini tionsandsurfacetextureparameters(ISO4287:1997). ENISO6708:1995, PipeworkComponentsDefinitionandselectionofDN(nominalsize)(ISO6708:1995). 3 Termsanddefinitions Forthepurposesoft
25、hisEuropeanStandardthefollowingtermsanddefinitionsapply: 3.1 DN seeENISO6708:1995 3.2 NPS (Nominalpipesize) Analphanumericdesignationofsizeforcomponentsofapipeworksystem,whichisusedforreferencepurposes.It comprises,forthepurposeofClassdesignatedflangesaccordingtothisstandard,thelettersNPSfollowedbya
26、 dimensionlessnumberwhichisindirectlyrelatedtothephysicalsizeoftheboreoroutsidediameteroftheend connections. NOTE1 ThenumberfollowingthelettersNPSdoesnotrepresentameasurablevalueandshouldnotbeusedforcalculation purposesexceptwherespecifiedintherelevantstandard. NOTE2 TherelationshipbetweenDNandNPSis
27、giveninthetables. 3.3 Class Analphanumericdesignationusedforreferencepurposesrelatedtoacombinationofmechanicalanddimensional characteristicsofacomponentofapipeworksystem.ItcomprisesthewordClassfollowedbyadimensionless wholenumber.EN17594:2003(E) 5 NOTE1 ThenumberfollowingthewordClassdoesnotrepresent
28、ameasurablevalueandshouldnotbeusedforcalculation purposesexceptwherespecifiedintherelevantstandard. NOTE2 ThedesignationClassisnotmeaningfulunlessitisrelatedtotherelevantcomponentstandardnumber. NOTE3 ItisintendedthatallcomponentswiththesameClassandNPSdesignationsshallhavethesamematingdimen sionsfor
29、compatibleflangetypes. 3.4 Ra,R z seeENISO4287:1998 3.5 Maximumallowablepressure,PS PSmeansthemaximumpressureforwhichtheequipmentisdesigned,asspecifiedbytheequipmentmanufac turer. 3.6 Maximumallowabletemperature,TS TSmeansthemaximumtemperatureforwhichtheequipmentisdesigned,asspecifiedbytheequipmentm
30、anu facturer. 4Designations 4.1Rangeofnominalsizes TherangeofDN(NPS)applicabletoeachClassshallbeasgiveninTable1. 4.2RangeofClassdesignations TherangeofClassdesignationsshallbeasgiveninTable1. 4.3Typesofflanges Figure1illustratesflangesidentifiedaccordingtotype: a) Type05Blankflange; b) Type11Weldnec
31、kflange. 4.4Designationofflanges Thedesignationoftheflangesshallcontainthefollowinginformation: a) Description(Flange); b) Numberofthisstandard(EN17594); c) Flangetype(11,05resp.); d) Flangefacingtype(e.g.C); e) DNorNPS(e.g.DN300); f) Fortype11flangesonly,neckdiameter, Aandneckthickness, S(e.g.324x5
32、); g) Class(e.g.Class150);EN17594:2003(E) 6 h) Material(e.g.ENAW5083O). EXAMPLE1 Foratype11flange: FlangeEN1759411CDN300324x5Class150ENAW5083O EXAMPLE2 Foratype05flange: FlangeEN1759405CDN300Class150ENAW5083O 5 Generalrequirements 5.1Flangematerials FlangesshallbemanufacturedfromthematerialgradesEN
33、AW5083 (AlMg4,5Mn0,7) OorEN AW6061 (AlMg1SiCu)T6accordingtoEN12392.Othermaterialsmaybeused.Forthep/Tratingssee5.5. Weldneckflangesshallbeforgedormadefromextrudedbars;blankflangesshallbeforgedormadefromplate. 5.2Repairs Repairweldingoftheflangesisnotpermitted. 5.3Bolting 5.3.1 Theboltingshallbechosen
34、accordingtothepressure,temperatureandgasket. 5.3.2 Boltingmaterialsshallbeselectedaccordingtothefollowingcriteria: a) ForallserviceconditionsinaccordancewithEN15151(bolt/nut):5.6/5,8.8/8,25Ni15CrTi/25Ni15CrTi, A470/A470,A270/A270,18Cr9NiMoAT+C/18Cr9NiMo,18Cr9NiAT+C/18Cr9Ni; b) forlesssevereserviceco
35、nditionse.g.waterserviceorincaseofoversizedflangedjoints,inaccordancewith EN15151(bolt/nut):A450/A450,A250/A250,18Cr9NiMo/18Cr9NiMo,18Cr9Ni/18Cr9Ni; NOTE Thechoiceofthisboltingshouldbebasedoneitherspecialexperienceoronrecalculations. c) whereboltingotherthanspecifiedinEN15151isrequiredthisshallbecho
36、senaccordingtotheparameters abovesothattheflangedjointremainstightundertheexpectedoperatingconditions. 5.3.3 Theuseofwashersisrecommended. 5.4Gaskets GasketsshallbeselectedfromtherelevantpartofEN12560. NOTE Ifspiralwoundgasketsareselected,thentheyshouldbelowstressdesign(y=5000,m=3forcalculationinac
37、cordancewithASMECode). 5.5Pressure/temperature(p/T)ratings Thepressuretemperatureratings(p/Tratings)forthematerialgradesin5.1aregiveninTable7. 5.6Dimensions 5.6.1 Dimensionsofflangesshallbeinaccordancewiththefollowingfiguresandtables:EN17594:2003(E) 7 Class150flanges:Figure3andTable4; Class300flange
38、s:Figure4andTable5. NOTE1 ApproximatemassesofflangesaregiveninannexA. NOTE2 Figures3and4areidentical.Theyarerepeatedforbetterhandlingofthestandard. 5.6.2 Boltholesshallbeequallyspacedonthepitchcirclediameter. 5.6.3 Ifneckthickness Sisorderedsmallerthangivenintables4and5,theinsidediameteratthenecksha
39、llbe taperedatanangleof14to18.If Sisorderedgreater,theborediametershallbe AS 2 . 5.6.4 ForflangesmadeofENAW6061(AlMg1SiCu)T6theneckthicknessSshallbesufficienttotakeaccount oflowerstrengthpropertiesduetowelding. 5.7Flangefacings 5.7.1 Typesofjointingfaces ForthetypesofjointingfacesseeFigure2,forthedi
40、mensionsofjointingfacesseeTable2. 5.7.2 Jointingfacefinish Alljointingfacesshallbemachinefinishedand,whencomparedbyvisualortactilemeanswithreferencespeci mens,shallbeinaccordancewithTable3. NOTE1 Itisnotintendedthatinstrumentmeasurementsaretakenonthejointingfaces. NOTE2 Otherfinishesmaybeagreedbetwe
41、enthemanufacturerandpurchaser. ForjointingfacetypeB1,turningshallbecarriedoutwitharoundnosedtoolinaccordancewithTable3. 5.8Spotfacingandbackfacingofflanges Anyspotfacingandbackfacingrequiredshallnotreducetheflangethicknesstolessthanthethicknessspecified. Whenspotfacingisused,thediametershallbelargee
42、noughtoaccommodatetheoutsidediameteroftheequiva lentnormalseriesofwashersfortheboltsizebeingfitted.Whenaflangeisbackfaced,itispermissibleforthefillet radiustobereducedbutitshallnotbeeliminatedentirely. 5.9Tolerances TolerancesondimensionsareasspecifiedinTable6. 5.10Marking Allflangesshallbemarkedasf
43、ollows: a) Flangemanufacturersnameortrademark(e.g.xxx); b) Numberofthisstandard(EN17594); c) DNorNPS(e.g.DN300); d) Class(e.g.Class150); e) Neckthicknessifnotstandard(e.g.7,1); f) Materialdesignation(e.g.ENAW5083O); g)Batchnumberorsuitablequalitycontrolnumbertraceabletothebatchnumberwhentestcertificationisre quired(e.g.yyy).EN17594:2003(E) 8 EXAMPLE xxx
