BS EN 12814-5-2000 Testing of welded joints of thermoplastics semi-finished products - Macroscopic examination《热塑半成品焊接接头试验 宏观检查》.pdf

1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 12814-5:2000 The Eu

2、ropean Standard EN 12814-5:2000 has the status of a British Standard ICS 25.160.40 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Testing of welded joints of thermoplastics semi-finished products Part 5: Macroscopic examinationThis British Standard, having been prepared under

3、 the direction of the Sector Committee for Materials and Chemicals, was published under the authority of the Standards Committee and comes into effect on 15 November 2000 BSI 11-2000 ISBN 0 580 36541 7 BS EN 12814-5:2000 Amendments issued since publication Amd. No. Date Comments National foreword Th

4、is British Standard is the official English language version of EN 12814-5:2000. The UK participation in its preparation was entrusted to Technical Committee PRI/80, Welding thermoplastics, which has the responsibility to: aid enquirers to understand the text; present to the responsible European com

5、mittee 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. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-ref

6、erences 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 Electronic Cat

7、alogue. 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. Summary of pages This document co

8、mprises a front cover, an inside front cover, the EN title page, pages 2 to 6, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued.EUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN128145 July2000 ICS25.160.40 Englishv

9、ersion Testingofweldedjointsofthermoplasticssemifinishedproducts Part5:Macroscopicexamination Essaidesassemblagessoudssurproduitssemifinisen thermoplastiquesPartie5:Examenmacroscopique PrfenvonSchweiverbindungenausthermoplastischen KunststoffenTeil5:MakroskopischeUntersuchung ThisEuropeanStandardwas

10、approvedbyCENon24June2000. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtot

11、heCentralSecretariatortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCentralSecretariathasthesamestatusast heofficial versions. CENmembersarethen

12、ationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Iceland,Ireland,Italy,Luxembourg,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG CentralSecre

13、tariat:ruedeStassart,36B1050Brussels 2000CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN128145:2000EPage2 EN128145:2000 Contents Page Foreword3 1 Scope 4 2 Normativereferences 4 3 Termsanddefinitions. .4 4 Principleofthetest. .4 5 Purposeofthetest

14、. .4 6 Cuttingoftestspecimens. 5 7 Testprocedure .5 7.1 General5 7.2 Testspecimenpreparation . 5 7.3 Surfacefinish .6 8 Examination6 9 Testreport . .6Page3 EN128145:2000 Foreword ThisEuropeanStandardhasbeenpreparedbyTechnicalCommitteeCEN/TC249“Plastics“,thesecretariatof whichisheldbyIBN. ThisEuropea

15、nStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofanidenticaltextor byendorsement,atthelatestbyJanuary2001,andconflictingnationalstandardsshallbewithdrawnatthelatest byJanuary2001. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowing count

16、riesareboundtoimplementthisEuropeanStandard:Austria,Belgium,CzechRepublic,Denmark,Finland, France,Germany,Greece,Iceland,Ireland,Italy,Luxembourg,Netherlands,Norway,Portugal,Spain,Sweden, SwitzerlandandtheUnitedKingdom.Page4 EN128145:2000 1Scope Thisstandardspecifiesthecuttingandpreparationoftestspe

17、cimensandtheconditionsforperformingthe macroscopicexaminationofthetestspecimens. Thetestisapplicabletoweldedassembliesmadefromthermoplasticsmaterialsfilledorunfilled,usingthe followingprocesses: hotgaswelding:roundnozzle,highspeednozzle,wedge; extrusionwelding; heatedtoolwelding:butt,saddle,socket,w

18、edge; electrofusionwelding:socket,saddle. 2 Normativereferences ThisEuropeanStandardincorporatesbydatedorundatedreference,provisionsfromotherpublications.These normativereferencesarecitedattheappropriateplacesinthetextandthepublicationsarelistedhereafter.For datedreferences,subsequentamendmentsto,or

19、revisionsof,anyofthesepublicationsapplytothisEuropean standardonlywhenincorporatedinitbyamendmentorrevision.Forundatedreferencesthelatesteditionofthe publicationreferredtoapplies(includingamendments). prEN13067:1999,Plasticsweldingpersonnel Approvaltestingofwelders Thermoplasticsweldedassemblies. 3

20、Termsanddefinitions Forthepurposesofthisstandard,thefollowingdefinitionapplies: 3.1 macroscopicexamination examinationofatestspecimenbythenakedeye,orunderlowmagnification,withorwithoutetching 4 Principleofthetest Macroscopicexaminationisusedtorevealthemacroscopicfeaturesofaweldedjoint,usuallybytheex

21、amination oftransversesections. 5 Purposeofthetest Thepurposeofmacroscopicexaminationshallbetoassessfeaturesasdescribedintable1. Thefeaturestobeexaminedshallbegiveninthecorrespondingqualitylevelstandard. Imperfectionsaredefinedbyareferencenumber.Page5 EN128145:2000 Table1 Guidelinesforassessmentoffe

22、aturesbymacroscopicexamination Features Reference numberof imperfection Macroscopic examination withoutetching Macroscopic examination withetching Notes (ifany) Cracks 1AAAA (X) X Cavities 2AAAA X X Inclusions 3AAAA X X Lackoffusion 4BAAA (X) Incompletepenetration 4CAAA (X) (X) Imperfectshape 5AAAA

23、X X Jointpreparation 6AAAA X X Weldingzone (X) X HAZ a) Weldingprocess X X NOTE Xmeansfeaturesrevealed;(X)meansfeatureswhichmayormaynotberevealedmeansfeatures notrevealed. a) Heataffectedzone. 6 Cuttingoftestspecimens Testingusuallyappliestotestspecimensorientedperpendiculartotheweldaxis(transverses

24、ection)includingthe welddepositandheataffectedzonesonbothsidesoftheweld. Testspecimensmayalsobecutatotherorientationstotheweldaxis. Thelocation,orientationandnumberofsectionsshouldbeasspecifiedintherelevantstandardssuchas prEN13067:1999and/orspecificationsorbyspecialagreements. 7 Testprocedure 7.1Ge

25、neral Thefollowinginformationshallbegivenbeforethepreparationofthetestspecimen: parentandweldmaterials; purposeofthetest. 7.2 Testspecimenpreparation Thetestspecimenshallbecutandpreparedforexaminationbyproducingasmoothsurface.Thiscanbeachieved byplaning,polishingorsimilartechnique. Ifpolishingisused

26、,thepolishingmaterialshallbeofseveralgradesuptoandatleastgrade1000(e.g.180320 600and1000). Thesurfacetobeexaminedshallnotbeadverselyinfluencedbytheseprocesses.Page6 EN128145:2000 7.3Surface finish Thesurfacetobeexaminedcanbesubmittedtoatreatmentinordertohighlighttheweldedzoneandpossiblythe imperfect

27、ionswhichmaybepresent. Thefollowingmethodscanbeused: heatthesurface(e.g.usinghotairflow,radiantheat,etc.); etchingthesurfacewithaspecificetchant; Theetchantsusedforthermoplasticsareoftentoxic.Therefore,etchingshouldonlybeperformedbyatrained person,followingrelevantsafetyregulations. 8Examination The

28、preparedsurfaceshallbeexaminedunderamagnificationbetween1and10. 9 Testreport Thetestreportshallrefertothisstandardanditshallincludeatleastthefollowinginformation: a) descriptionandidentificationofthetestpieceandtestspecimens; b) surfacefinish; c) surfacetreatmentmethodifapplicable(heatsource,etchant

29、,etchingtime,.); d) purposeofthetest; e) typeofweldedjoint; f)magnification ; g) result(s)ofexamination; h) nameandsignatureoftheresponsiblepersonforthetestreport.blankBS EN 12814-5:2000 BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |

30、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It

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