1、Licensed Copy: Wang Bin, ISO/Exchange China Standards Information Centre, 19 March 2003, Uncontrolled Copy, (c) BSIBRITISH STANDARD BS EN 10314:2002 Method for the derivation of minimum values of proof strength of steel at elevated temperatures The European Standard EN 10314:2002 has the status of a
2、 British Standard ICS 77.140.30 Licensed Copy: Wang Bin, ISO/Exchange China Standards Information Centre, 19 March 2003, Uncontrolled Copy, (c) BSIBS EN 10314:2002 This British Standard, having been prepared under the direction of the Engineering Sector Policy and Strategy Committee, was published u
3、nder the authority of the Standards Policy and Strategy Committee on 27 November 2002 BSI 27 November 2002 ISBN 0 580 40824 8 National foreword This British Standard is the official English language version of EN 10314:2002. It supersedes BS 3920-1:1973, BS 3920-2:1986, DD ENV 22605-1:1992, DD ENV 2
4、2605-2:1992 and DD ENV 22605-3:1992 which are withdrawn. The UK participation in its preparation was entrusted by Technical Committee ISE/73, Steels for pressure purposes, to Subcommittee ISE/73/2, Steel plates and bars for pressure purposes, which has the responsibility to: A list of organizations
5、represented on this subcommittee 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 Catalogue under the section entitled “International Standards Correspondenc
6、e 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 responsible for its correct application. Compliance with a British Standard does not of itsel
7、f 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 UK interests informed; monitor related international and European developments and pr
8、omulgate them in the UK. Summary of pages This document comprises a front cover, 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 publ
9、ication Amd. No. Date Comments Licensed Copy: Wang Bin, ISO/Exchange China Standards Information Centre, 19 March 2003, Uncontrolled Copy, (c) BSIEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN10314 November2002 ICS77.140.30 SupersedesENV226051:1991,ENV226052:1991and ENV226053:1991 Englishversion
10、Methodforthederivationofminimumvaluesofproofstrengthof steelatelevatedtemperatures Mthodededrivationdesvaleursminimalesdelalimite conventionnelledlasticitdesacierstempratures leves VerfahrenzurAbleitungvonMindestwertender DehngrenzevonStahlbeierhhtenTemperaturen ThisEuropeanStandardwasapprovedbyCENo
11、n19August2002. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagement
12、CentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandards
13、bodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruede
14、Stassart,36B1050Brussels 2002CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN10314:2002E Licensed Copy: Wang Bin, ISO/Exchange China Standards Information Centre, 19 March 2003, Uncontrolled Copy, (c) BSIEN10314:2002(E) 2 Contents page Foreword3 Int
15、roduction . .4 1S c o p e .5 2 Normativereferences.5 3 Termsanddefinitions 5 4S y m b o l s .6 5M e t h o d . .6 5.1Inputdatagroups .6 5.2Ratiovalues . 6 5.3Minimumproofstrengthvalues 7 6 Applicationofthemethod .8 6.1Representativedatagroups. .8 6.2Numberofdata . .8 6.3Consistencyofdata 8 6.4Result.
16、 .9 Bibliography. .10 Licensed Copy: Wang Bin, ISO/Exchange China Standards Information Centre, 19 March 2003, Uncontrolled Copy, (c) BSIEN10314:2002(E) 3 Foreword Thisdocument(EN10314:2002)hasbeenpreparedbytheECISS/TC22“Steelsforpressure purposesQualities“,thesecretariatofwhichisheldbyDIN. ThisEuro
17、peanStandardshallbegiventhestatusofanationalstandard,eitherbypublication ofanidenticaltextorbyendorsement,atthelatestbyMay2003,andconflictingnational standardsshallbewithdrawnatthelatestbyMay2003. ThisdocumentsupersedesENV226051:1991,ENV226052:1991andENV226053:1991. ThisstandardincludesaBibliography
18、. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizations ofthefollowingcountriesareboundtoimplementthisEuropeanStandard:Austria,Belgium, CzechRepublic,Denmark,Finland,France,Germany,Greece,Iceland,Ireland,Italy, Luxembourg,Malta,Netherlands,Norway,Portugal,Spain,Sweden,Switze
19、rlandandthe UnitedKingdom. Licensed Copy: Wang Bin, ISO/Exchange China Standards Information Centre, 19 March 2003, Uncontrolled Copy, (c) BSIEN10314:2002(E) 4 Introduction MinimumvaluesfortensilepropertiesarespecifiedinEuropeanStandardsforsteelsand othermetalsforelevatedtemperatureservice.Suchvalue
20、sareusedtodeterminedesign strengthvaluesparticularlywherethematerialsareusedinpressuresystems. TwoInternationalStandards,ISO26051andISO26052areavailableandhavebeen adoptedbyCENasEuropeanPrestandards,ENV226051andENV226052.Theysetout procedures,basedonstatisticalassessmentsofbodiesofdata,forthederivat
21、ionand verificationofminimumvaluesof0,2%proofstrengthatelevatedtemperatures.These proceduresdeterminetheminimumvaluesfromlowerconfidencelines.AthirdInternational Standard,ISO26053,adoptedbyCENasENV226053,setsoutproceduresfordetermining minimumvaluesfromtheaveragetrendbehaviourofthepropertyofinterest
22、asafunctionof temperature. OneofthepurposesoftheproceduresinISO26051andISO26052(ENV226051and ENV226052)istoreducetherequirementforelevatedtemperaturetensileacceptancetests onindividualproductsbyorganizationsandmanufacturerscontributingdataforassessment. ExperiencehasshownthattheproceduresinISO26051a
23、ndISO26052(ENV226051and ENV226052)havelimitationsaffectingtherelationshipbetweenderivedminimumproperty valuesandtheminimaofthetestdataarisingfromthestatisticalandsomesubjective decisionsatvariousstagesoftheprocedures.Theyalsorequirerelativelylargeamountsof datatoproduceanacceptablelevelofaccuracy. T
24、heproceduresetoutinISO26053(ENV226053)requireslessdatabutbecauseitis designedtoalwaysgiveconservativevaluesfromfewdata,itliketheotherprocedures,can givenonrepresentativeresults.However,theprincipleofthisprocedureisconsideredtobe morerealisticandisadoptedasthebasisofthisEuropeanStandard;theobjectiveb
25、eingto produceanassessmentprocedurefortensilepropertydatawhichissimpletooperate,gives representativeresultsandisusableincomputerisedform. ThisEuropeanStandard,replacingENV226051,2and3,setsoutamethodforderiving minimumproofstrengthvaluesforsteelsatelevatedtemperatureswiththeintentionthatsuch valuesar
26、especifiedinrelevantproductstandards. ThisEuropeanStandarddoesnotspecifyaverificationprocedure.Verificationoftensile propertiesatelevatedtemperaturesisnormallyspecifiedintherelevantproductstandard usingtheminimumpropertyvaluesderivedbytheprocedureestablishedinthisEuropean Standard. Themethodproposed
27、hasbeentestedforproofstrengthvaluesofsteel.However,itis consideredthatthemethodcanalsobeappliedforothermetalsandforthederivationof minimumvaluesoftensilestrengthatelevatedtemperatures. Licensed Copy: Wang Bin, ISO/Exchange China Standards Information Centre, 19 March 2003, Uncontrolled Copy, (c) BSI
28、EN10314:2002(E) 5 1Scope ThisEuropeanStandardspecifiesamethodforderivingtheminimumproofstrengthvalues forsteelsatelevatedtemperatures. However,thisstandarddoesnotspecifyaverificationprocedure. 2Normativereferences ThisEuropeanStandardincorporatesbydatedorundatedreference,provisionsfromother publicat
29、ions.Thesenormativereferencesarecitedattheappropriateplacesinthetext,and thepublicationsarelistedhereafter.Fordatedreferences,subsequentamendmentstoor revisionsofanyofthesepublicationsapplytothisEuropeanStandardonlywhenincorporated initbyamendmentorrevision.Forundatedreferencesthelatesteditionofthep
30、ublication referredtoapplies(includingamendments). EN100021, MetallicmaterialsTensiletestingPart1:Methodoftest(atambient temperature). EN100025, MetallicmaterialsTensiletestingPart5:Methodoftestingatelevated temperature. ENISO377, SteelandsteelproductsLocationandpreparationofsamplesandtestpieces for
31、mechanicaltesting(ISO377:1997). 3Termsanddefinitions ForthepurposesofthisEuropeanStandard,thefollowingtermsanddefinitionsapplies. 3.1 dataset propertyvaluedatafromroomandelevatedtemperaturesfromtheproductselectedfor testing NOTEThisdatacanincludeaveragedvalueswheremorethanonesetoftestsatagiventemper
32、ature representingonelocationiscarriedout. 3.2 datagroup propertyvaluedatafromXdatasetsasusedforeachassessment 3.3 resultset ratiovaluesforeachdataset Licensed Copy: Wang Bin, ISO/Exchange China Standards Information Centre, 19 March 2003, Uncontrolled Copy, (c) BSIEN10314:2002(E) 6 4Symbols Forthep
33、urposesofthisEuropeanStandardthefollowingsymbolsapply: t elevatedtemperaturein C; f (t) ratiovalue;propertyvalueatelevatedtemperature t(in C)dividedbyproperty valueatroomtemperature; f av(t) average f (t) valueforaspecifiedtemperature(seeFigure1); R e yieldstrength(inMPa 1) ); R p proofstrength(inMP
34、a 1) ); R p(t) /R p(20) ratiovalue;proofstrengthatelevatedtemperature tdividedbyproofstrength valueatroomtemperature(20 C); s r residualscatter. 5Method 5.1Inputdatagroups 5.1.1Foragivensteelgrade,inputdata,toformadatagroup,shallbeestablishedbytensile testsat: a)roomtemperatureinaccordancewithEN1000
35、21; b)elevatedtemperatureinaccordancewithEN100025. 5.1.2Thedatashallbeidentifiedbyreferencetoaproductstandardandasteelgrade(steel nameand/orsteelnumberasappropriate). WhereinputdatapredatesthepublicationoftheEuropeanStandardsdetailedin5.1.1a)and 5.1.1b)thesamplingandtensiletestingshallhavebeencarrie
36、doutinaccordancewiththe relevantproductstandard. 5.1.3Testpiecesfortensiletestsbothatroomandelevatedtemperaturesshallbetakenfrom thesameproduct.ThelocationofthetestpieceshallbeinaccordancewithENISO377.Test piecesshallbetakenasclosetoeachotheraspossible. 5.1.4Inputdatashallclearlyidentifythetestmetho
37、dusedandalldatawithineachset(see definitions)shallhavebeendeterminedbythesamemethod. 5.2Ratiovalues Propertyvaluesresultingfromthetensiletestsatelevatedtemperatureinaccordancewith 5.1.1b)arenormalisedbyexpressingeachvalueasaratio f (t) oftheequivalentpropertyvalue atroomtemperatureobtainedinaccordan
38、cewithsection5.1.1a)forthesamebatchof material,i.e.: 1) 1MPa=1N/mm Licensed Copy: Wang Bin, ISO/Exchange China Standards Information Centre, 19 March 2003, Uncontrolled Copy, (c) BSIEN10314:2002(E) 7 Theratiovalues f (t) obtainedforeachdatasetconstitutearesultset.Eachresultsetisplotted asafunctionof
39、temperatureandtheaveragevalue f av(t) ateachtemperaturedeterminedfroma trendcurvewhichpassesthrougharatiovalueof1,0atroomtemperature,seeFigure1.The trendcurveshouldbedeterminedbyarecognisedprocedure,normallyapolynomialcurve withdegree14,usingarecognisedstatisticalproceduresuchasa“leastsquares“techni
40、que. Beforefittingthetrendcurvethedatashallbeexaminedtodeterminewhetheritformsmore thanonepopulation;wherethatisthecasethedatashallbeexaminedindetailwithrespectto itspedigree(see6.2)andwheredeemednecessarytreatedseparately(seealso6.1and6.3). 5.3Minimumproofstrengthvalues Fromthetrendcurveestablished
41、andaverageratiovalues f av(t) derivedinaccordancewith5.2, theminimumproofstrengthvalues R p(t)min (whereappropriate R e maybeusedinsteadof R p ) aredeterminedbyalternativeapplicationofoneofthefollowingprocedures,dependingon thelowestvalueof f av(t) achievedoverthetemperaturerangeforwhichminimumproof
42、 strengthvaluesarerequired: a)when f av(t) 0,4withintherangeoftemperaturevaluesofinterest: R p(t)min = R p(20)min (1,1 f av(t) 0,1) NOTEInderivingtheformulaalinearrelationshiphasbeenanticipatedbetween R p(t) and R p(20) ata giventemperature twheretheaverageratiovalue f av(t) istheslopeoftheregressio
43、nlinewhichpasses throughthezeropoint,andwherethestandarddeviationoftheresidualscatter s r issetequalto0,05 R p(20)min . Forthepurposeofthisstandardthespecifiedminimumproofstrengthvalue R p(t)min atagiven temperature tisdefinedastheproofstrengthvaluederivedfromthelower(2 s) confidencelevel valueforproofstrengthataroomtemperaturewhichis0,1 R p(20)min higherthanthespecified minimumproofstrengthvalueatroomtemperature. Intermsofprobabilitytheminimumproofstrengthvalue R p(t)min approximatelyrepresentsthevalueof R p(t) onthe2 sconfidencelevelofavirtualdatasetthelowestroomtemperatureproo
