1、BRITISH STANDARD BS EN ISO 8491:2004 Metallic materials Tube (in full section) Bend test The European Standard EN ISO 8491:2004 has the status of a British Standard ICS 77.040.10 BS EN ISO 8491:2004 This British Standard was published under the authority of the Standards Policy and Strategy Committe
2、e on 24 November 2004 BSI 24 November 2004 ISBN 0 580 44838 X National foreword This British Standard is the official English language version of EN ISO 8491:2004. It is identical with ISO 8491:1998. It supersedes BS EN 10232:1994 which is withdrawn. The UK participation in its preparation was entru
3、sted by Technical Committee ISE/NFE/4, Mechanical testing of metals, to Subcommittee ISE/NFE/4/2, Ductility testing, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which imp
4、lement international or European publications referred to in this document may be found in 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 d
5、oes 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 itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/Europ
6、ean 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 cover, an inside front cover, the EN ISO title page,
7、 the EN ISO foreword page, the ISO title page, page ii, pages 1 to 3 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM ENISO8491 J
8、uly2004 ICS77.040.10 SupersedesEN10232:1993 Englishversion MetallicmaterialsTube(infullsection)Bendtest(ISO 8491:1998) MatriauxmtalliquesTubesEssaidecintragesur tronon(ISO8491:1998) MetallischeWerkstoffeRohr(Rohrabschnitt) Biegeversuch(ISO8491:1998) ThisEuropeanStandardwasapprovedbyCENon1July2004. C
9、ENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheCentralSecretariatortoanyC
10、ENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCentralSecretariathasthesamestatusast heofficial versions. CENmembersarethenationalstandardsbodiesofAust
11、ria,Belgium,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France, Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal, Slovakia, Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISA
12、TION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2004CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.ENISO8491:2004:EI NESO 48:1902( 40E) 2 Foreword The text of ISO 8491:1998 has been prepared by Technical Committee ISO/
13、TC 164 “Mechanical testing of metals” of the International Organization for Standardization (ISO) and has been taken over as EN ISO 8491:2004 by Technical Committee ECISS/TC 29 “Steel tubes and fittings for steel tubes“, the secretariat of which is held by UNI. This European Standard shall be given
14、the status of a national standard, either by publication of an identical text or by endorsement, at the latest by January 2005, and conflicting national standards shall be withdrawn at the latest by January 2005. This document supersedes EN 10232:1993. According to the CEN/CENELEC Internal Regulatio
15、ns, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway
16、, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Endorsement notice The text of ISO 8491:1998 has been approved by CEN as EN ISO 8491:2004 without any modifications. ENISO8491:2004A Referencenumbe r ISO8491:1998 (E) INTERNATIONAL STANDARD ISO 8491 Secondedition
17、19981101 MetallicmaterialsTube(infullsection) Bendtest MatriauxmtalliquesTubesEssaidecintragesurtronon ENISO8491:2004)E(8991:1948OSI OSI8991 Athgirllsserevr.deselnUstosiwrehescepfi,deitraponfothsicilbuptayamnoicudorperebturodezilideniynafomrroybna ymsnae,lecetrinoc .rehsilbupehtmorfgnitirwninoissimr
18、eptuohtiw,mliforcimdnagniypocotohpgnidulcni,lacinahcemro noitazidradnatSrofnoitazinagrOlanoitanretnI 65elatsopesaC 02evneG1121HC dnalreztiwS tenretnI hc.osiosi dnalreztiwSnidetnirP ii Foreword ISO(theInternationalOrganizationforStandardization)isaworldwidefederationofnationalstandardsbodies(ISO memb
19、erbodies).TheworkofpreparingInternationalStandardsisnormallycarriedoutthroughISOtechnical committees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeenestablishedhas therighttoberepresentedonthatcommittee.Internationalorganizations,governmentalandnongovernmental,in liaisonwithISO,a
20、lsotakepartinthework.ISOcollaboratescloselywiththeInternationalElectrotechnical Commission(IEC)onallmattersofelectrotechnicalstandardization. DraftInternationalStandardsadoptedbythetechnicalcommitteesarecirculatedtothememberbodiesforvoting. PublicationasanInternationalStandardrequiresapprovalbyatlea
21、st75%ofthememberbodiescastingavote. InternationalStandardISO8491waspreparedbyTechnicalCommitteeISO/TC164, Mechanicaltestingofmetals , SubcommitteeSC2, Ductilitytesting . Thissecondeditioncancelsandreplacesthefirstedition(ISO8491:1986),ofwhichitconstitutesatechnical revision. AnnexAofthisInternationa
22、lStandardisforinformationonly. ENISO8491:2004DRADNATSLANOITANRETNI OSI )E(8991:1948OSI 1 MetallicmaterialsTube(infullsection)Bendtest 1Scope ThisInternationalStandardspecifiesamethodfordeterminingtheabilityoffullsectionmetallictubesofcircular crosssectiontoundergoplasticdeformationinbending.Itisinte
23、ndedfortubeswithanoutsidediameternogreater than65mm,althoughtherangeoftheoutsidediameterforwhichthisInternationalStandardisapplicablemaybe moreexactlyspecifiedintherelevantproductstandard. NOTEBendtestsofthetestpiecestakenfromtubesintheformoftransversestripsshouldbemadeinaccordancewith ISO7438soasto
24、increasetheoriginalcurvatureofthetestpiece. 2 Symbols,designationsandunits Symbols,designationsandunitsforthebendtestoftubesinfullsectionaregivenintable1andareshownin figure1. Table1 Symbol Designation Unit a a Wallthicknessofthetube mm D Outsidediameterofthetube mm L Lengthofthetestpiecebeforethete
25、st mm r Insideradiusatthebottomofthegroove mm a Angleofthebend degree a Thesymbol Tisalsousedinsteeltubestandards. Figure1 ENISO8491:2004)E(8991:1948OSI OSI 2 3Principle Bendingastraighttubeinfullsectionaroundagroovedformerofaspecifiedradius runtiltheangleofbend a(see figure1)reachesthevaluespecifie
26、dintherelevantproductstandard. 4Testing equipment 4.1 Tubebendingmachines ,designedtopreventthesectionofthetubefrombecomingoval. Thetubebendformerofthemachineshallhaveagroovecorrespondinginprofiletotheoutsidediameterofthe tube.Theradiusatthebottomofthegrooveshallbespecifiedintherelevantproductstanda
27、rd. NOTEThetoleranceofradius r,thedepthandovalityofthegroove,allhaveaneffectonthetestresult. 5Test piece Thetestpieceshallbeaportionofastraighttubeofanylengthwhichwillallowthetesttobecarriedoutonthe tubebendingmachine. 6Procedure 6.1 Ingeneral,thetestshallbecarriedoutatambienttemperaturewithinthelim
28、itsof10Cto35C.Thetest carriedoutundercontrolledconditionsshallbemadeatatemperatureof(23 5)C. 6.2 Bendtheunfilledtestpieceofthetubebymeansofatubebendingmachine,ensuringcontactbetweenthe testpieceandthetubebendformeroverthelengthofbend,untilthespecifiedangleofbendisreached. 6.3 Ifweldedtubesaresubject
29、edtothetest,thepositionoftheweldshallbeat90 totheplaneofbendingi.e.the neutralaxis,unlessotherwiseindicatedintherelevantproductstandard. 6.4 Interpretationofthebendtestoftubesshallbecarriedoutinaccordancewiththerequirementsoftherelevant productstandard.Whentheserequirementsarenotspecified,thetestpie
30、ceshallbeconsideredtohavepassedthe testifnocracksarevisiblewithouttheuseofmagnifyingaids. 7Test report Atestreportshallbeprovidedwhensospecifiedintherelevantproductstandard.Inthiscase,thetestreportshall includeatleastthefollowinginformation: a) referencetothisInternationalStandard,i.e.ISO8491; b) id
31、entificationofthetestpiece; c) dimensionsofthetestpiece; d) angleofbend aandradius r; e) positionoftheweldinrelationtotheplaneofbending,ifrelevant; f) resultofthetest. ENISO8491:2004OSI )E(8991:1948OSI 3 AnnexA (informative) Bibliography 1 ISO7438:1985, MetallicmaterialsBendtest . ENISO8491:2004BS E
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