SIST EN 12814-4:2002
(Main)Testing of welded joints of thermoplastics semi-finished products - Part 4: Peel test
Testing of welded joints of thermoplastics semi-finished products - Part 4: Peel test
This standard specifies the dimensions, the method of sampling, the preparation of the test specimens, and also the conditions for performing the peel test perpendicular to the weld in order to determine the peel resistance and the failure behaviour.
A peel test may be used in conjunction with other tests (e.g. tensile creep, macro...) to assess the performance of welded assemblies, made from thermoplastics materials.
Peel tests are applicable to overlap welded assemblies made from thermoplastics materials, irrespective of the welding process used.
Prüfen von Schweißverbindungen aus thermoplastischen Kunststoffen - Teil 4: Schälversuch
Die vorliegende Norm legt die Maße, das Verfahren für die Probenahme und die Herstellung von Probekörpern sowie die Bedingungen für die Durchführung des Schälversuches senkrecht zur Schweißnaht fest, um den Schälwiderstand und das Versagensverhalten zu bestimmen.
Ein Schälversuch darf in Verbindung mit weiteren Prüfungen durchgeführt werden (z. B. Zeitstand-Zugversuch, Makroskopische Untersuchung, ...), um die Gebrauchstauglichkeit von geschweißten Verbindungen aus thermo-plastischen Kunststoffen zu beurteilen.
Schälversuche sind unabhängig vom angewendeten Schweißverfahren auf Überlappschweißverbindungen aus thermoplastischen Kunststoffen anwendbar.
Essai des assemblages soudés sur produits semi-finis en thermoplastiques - Partie 4: Essai de pelage
La présente norme spécifie les dimensions, la méthode d'échantillonnage, la préparation des éprouvettes, ainsi que les conditions d'exécution de l'essai de pelage perpendiculairement a la soudure pour déterminer la résistance au pelage et le comportement a la rupture.
Un essai de pelage peut etre utilisé en combinaison avec d'autres essais ou examens (par exemple essai de fluage, examen macroscopique, ?) pour évaluer les performances d'assemblages soudés en thermoplastiques.
Les essais de pelage sont applicables aux assemblages en thermoplastiques soudés a recouvrement, quel que soit le procédé de soudage utilisé.
Preskus zvarjenih spojev plastomernih polizdelkov - 4. del: Preskus luščenja
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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Prüfen von Schweißverbindungen aus thermoplastischen Kunststoffen - Teil 4: SchälversuchEssai des assemblages soudés sur produits semi-finis en thermoplastiques - Partie 4: Essai de pelageTesting of welded joints of thermoplastics semi-finished products - Part 4: Peel test25.160.40Varjeni spoji in variWelded jointsICS:Ta slovenski standard je istoveten z:EN 12814-4:2001SIST EN 12814-4:2002en01-februar-2002SIST EN 12814-4:2002SLOVENSKI
STANDARD
SIST EN 12814-4:2002
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12814-4September 2001ICS 25.160.40English versionTesting of welded joints of thermoplastics semi-finished products- Part 4: Peel testEssai des assemblages soudés sur produits semi-finis enthermoplastiques - Partie 4: Essai de pelagePrüfen von Schweißverbindungen aus thermoplastischenKunststoffen - Teil 4: SchälversuchThis European Standard was approved by CEN on 16 August 2001.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2001 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 12814-4:2001 ESIST EN 12814-4:2002
EN 12814-4:2001 (E)2ContentspageForeword.31Scope.42Normative references.43Terms and definitions.44Symbols and designations.55Peel test methods.56T-peel test.56.1Principle of the test.56.2Sampling procedures.56.3Dimensions of test specimens.66.4Cutting of test specimens.76.5Mechanical testing.76.6Test equipment.86.7Determination of the peel resistance.87Decohesion test.97.1Principle of the test.97.2Sampling procedure.97.3Conditioning.97.4Preparation of test specimens.97.5Test equipment.127.6Mechanical testing.127.7Calculation of joint toughness.128Crush test.128.1Principle of the test.128.2Sampling procedure.138.3Conditioning.148.4Test equipment.148.5Mechanical testing.149Test report.15SIST EN 12814-4:2002
EN 12814-4:2001 (E)3ForewordThis European Standard has been prepared by Technical Committee CEN/TC 249 "Plastics", the secretariat ofwhich is held by IBN.This European Standard shall be given the status of a national standard, either by publication of an identical text orby endorsement, at the latest by March 2002, and conflicting national standards shall be withdrawn at the latest byMarch 2002.According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden,Switzerland and the United Kingdom.SIST EN 12814-4:2002
EN 12814-4:2001 (E)41 ScopeThis standard specifies the dimensions, the method of sampling, the preparation of the test specimens, and alsothe conditions for performing the peel test perpendicular to the weld in order to determine the peel resistance andthe failure behaviour.A peel test may be used in conjunction with other tests (e.g. tensile creep, macro.) to assess the performance ofwelded assemblies, made from thermoplastics materials.Peel tests are applicable to overlap welded assemblies made from thermoplastics materials, irrespective of thewelding process used.2 Normative referencesThis European Standard incorporates by dated or undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text and the publications are listed hereafter. Fordated references, subsequent amendments to, or revisions of, any of these publications apply to this standard onlywhen incorporated in it by amendment or revision. For undated references the latest edition of the publicationreferred to applies (including amendments).EN 12814-5, Testing of welded joints of thermoplastics semi-finished products — Part 5 : Macroscopicexamination.EN 13100-1, Non destructive testing of welded joints of thermoplastics semi-finished products — Part 1 : Visualexamination.ISO 5893, Rubber and plastics test equipment — Tensile, flexural and compression types (constant rate oftraverse) — Description.ISO 13954, Plastics pipes and fittings — Peel decohesion test for polyethylene (PE) electrofusion assemblies ofnominal outside diameter greater than or equal to 90 mm.3 Terms and definitionsFor the purposes of this European standard, the following term and definition apply.3.1peel resistance, fthe arithmetic mean of the force values divided by the width of the test specimen (only relevant for T-peel test)SIST EN 12814-4:2002
EN 12814-4:2001 (E)54 Symbols and designationsSymbols and designations are given in Table 1.Table 1 — Test specimen designationsSymbols andabbreviationsDesignationsUnitsanNominal thickness of test piecemillimetrebWidth of the test specimenmillimetrecMaximum width of the air channel (if applicable)millimetreciInitial crack sizemillimetreDnNominal diameter of tubemillimetreFwMaximum force measured during the testNewtonHHalf thickness of decohesion test specimenmillimetreKApparent toughnessmega N.m-3/2LcClamped length of test specimen ligamentmillimetreLdLength of fracture in the fusion planemillimetreLiFree length of test specimenmillimetreLw aMaximum width of the weld of the test specimenmillimetrePlPeel resistanceN/mm2aFor welds containing an air channel, Lw shall be taken as the width of the whole weld minus thewidth of the channel (c).5 Peel test methodsPeel tests can be used to assess the performance of overlap joints in both welded sheet and pipe assemblies.For assessing welded sheet assemblies the T-peel test shall be used as defined in clause 6. This test is notapplicable to welded test pieces containing sheets of different nominal thickness.For electrofusion joints with nominal thickness of pipe/fitting greater than 10 mm, a decohesion test shall be usedas defined in ISO 13954 or in clause 7.For socket fusion joints, and for electrofusion joints with nominal outside diameter less than or equal to 90 mm, thecrush test shall be used, as defined in clause 8. The crush test can also be used for electrofusion joints with outsidediameters greater than 90 mm.6 T-peel test6.1 Principle of the testThe test consists of peeling a test specimen at a constant rate of displacement until it fractures, peels or yields.6.2 Sampling proceduresThe welded test specimens shall be cut perpendicular to the welded joint following a lapse of at least eight hoursfrom welding.SIST EN 12814-4:2002
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