www bzfxw com BRITISH STANDARD BS EN 435 1994 Resilient floor coverings — Determination of flexibility The European Standard EN 435 1994 has the status of a British Standard UDC 698 7 692 535 6 645 13[.]
Licensed copy: The University of Hong Kong, The University of Hong Kong, Version correct as of 10/03/2009 12:36, (c) BSI BRITISH STANDARD Resilient floor coverings — Determination of flexibility The European Standard EN 435:1994 has the status of a British Standard UDC 698.7:692.535.6:645.13:620.174.22 BS EN 435:1994 Licensed copy: The University of Hong Kong, The University of Hong Kong, Version correct as of 10/03/2009 12:36, (c) BSI BS EN 435:1994 This British Standard, having been prepared under the direction of the Plastics and Rubber Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 15 November 1994 © BSI 12-1999 The following BSI references relate to the work on this standard: Committee reference PRM/60 Draft for comment 91/35316 DC ISBN 580 22755 Cooperating organizations The European Committee for Standardization (CEN), under whose supervision this European Standard was prepared, comprises the national standards organizations of the following countries: Austria Belgium Denmark Finland France Germany Greece Iceland Ireland Italy Luxembourg Netherlands Norway Portugal Spain Sweden Switzerland United Kingdom Oesterreichisches Normungsinstitut Institut belge de normalisation Dansk Standard Suomen Standardisoimisliito, r.y Association franỗaise de normalisation Deutsches Institut für Normung e.V Hellenic Organization for Standardization Technological Institute of Iceland National Standards Authority of Ireland Ente Nazionale Italiano di Unificazione Inspection du Travail et des Mines Nederlands Normalisatie-instituut Norges Standardiseringsforbund Instituto Portugs da Qualidade Asociación Espola de Normalización y Certificación Standardiseringskommissionen i Sverige Association suisse de normalisation British Standards Institution Amendments issued since publication Amd No Date Comments Licensed copy: The University of Hong Kong, The University of Hong Kong, Version correct as of 10/03/2009 12:36, (c) BSI BS EN 435:1994 Contents Cooperating organizations National foreword Foreword Scope Definition Sampling and preparation of test pieces Method A Method B Test report National annex NA (informative) Committees responsible © BSI 12-1999 Page Inside front cover ii 3 3 3 Inside back cover i Licensed copy: The University of Hong Kong, The University of Hong Kong, Version correct as of 10/03/2009 12:36, (c) BSI BS EN 435:1994 ii National foreword This British Standard has been prepared under the direction of the Plastics and Rubber Standards Policy Committee and is the English language version of EN 435:1994 Resilient floor coverings — Determination of flexibility, published by the European Committee for Standardization (CEN) EN 435 was produced as a result of European discussions in which the United Kingdom took an active part There is no existing British Standard equivalent to EN 435 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 comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages to 4, an inside back cover and a back cover This standard has been updated (see copyright date) and may have had amendments incorporated This will be indicated in the amendment table on the inside front cover © BSI 12-1999 Licensed copy: The University of Hong Kong, The University of Hong Kong, Version correct as of 10/03/2009 12:36, (c) BSI EUROPEAN STANDARD EN 435 NORME EUROPÉENNE August 1994 EUROPÄISCHE NORM UDC 698.7:692.535.6:645.13:620.174.22 Descriptors: Floor coverings, textile floor coverings, tests, determination, flexibility English version Resilient floor coverings — Determination of flexibility Revêtements de sol résilients – Détermination de la flexibilité Elastische Bodenbeläge — Bestimmung der Biegsamkeit This European Standard was approved by CEN on 1994-08-22 CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member This European Standard exists in three official versions (English, French, German) A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ CEN European Committee for Standardization Comité Européen de Normalisation Europäisches Komitee für Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels © 1994 Copyright reserved to CEN members Ref No EN 435:1994 E Licensed copy: The University of Hong Kong, The University of Hong Kong, Version correct as of 10/03/2009 12:36, (c) BSI EN 435:1994 Foreword This European Standard was prepared by Technical Committee CEN/TC134, Resilient and textile floor coverings, the Secretariat of which is held by BSI This document was submitted to the formal vote and approved This European Standard shall be given the status of a national standard either by publication of an identical text or by endorsement, at the latest by February 1995, and conflicting national standards shall be withdrawn at the latest by February 1995 In accordance with the CEN/CENELEC Internal Regulations The following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ © BSI 12-1999 Licensed copy: The University of Hong Kong, The University of Hong Kong, Version correct as of 10/03/2009 12:36, (c) BSI EN 435:1994 Scope 4.5 Expression of results This European Standard specifies two methods for determining the ability of a resilient floor covering to sustain a flexing Report the results of the tests as cracking or no cracking Definition 5.1 Principle For the purposes of this standard, the following definition applies: flexibility the ability of a resilient floor covering to be bent Sampling and preparation of test pieces Take a representative sample from the available material Take six test pieces, at equal distances from the sample, the distance between the outer edge of the sample and the nearest edge of the test piece being at least 100 mm, each measuring (250 to 300) mm × 50 mm from a sample, three in the direction of manufacture and three in the transverse direction If necessary, place the sample in an oven at 30 °C for 15 before cutting the test pieces Ensure that the edges of the test pieces are clean-cut, without notches Method B The test piece is deformed with a cylinder with a radius of curvature much greater than the test piece thickness by a force centred between two fixed supports 5.2 Apparatus 5.2.1 A test piece stand, comprising two metal cylinders, of minimum diameter 30 mm and minimum length 55 mm, with a distance of (150 ± 5) mm between the two axes of the cylinders 5.2.2 A third, identical parallel cylinder, which can be displaced in the vertical plane of symmetry of the stand at a speed of (100 ± 5) mm/min 5.2.3 A water bath, capable of being maintained at (25 ± 0,5) °C 5.3 Procedure ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ Method A 4.1 Principle The test piece is bent through 180° around a mandrel under specified conditions 4.2 Apparatus 4.2.1 Fixed metal mandrels with nominal diameters 100 mm, 80 mm, 70 mm, 60 mm, 55 mm, 45 mm, 40 mm, 35 mm, 30 mm, 25 mm, 20 mm, 15 mm, 10 mm 4.3 Conditioning Condition the test pieces and mandrels at a temperature of (23 ± 2) °C and relative humidity of (50 ± 5) % for a minimum of 24 h Maintain these conditions when carrying out the test 4.4 Procedure Take the mandrel specified for the product With the surface layer outwards, bend the test piece by hand around the mandrel through an arc of 180° within s Note when any superficial damage occurs in the surface Ignore any effects within 10 mm from the edges of the test piece © BSI 12-1999 Store the test pieces in the water bath for a minimum of h Remove the test piece from the water bath and place it on the stand Bring the third cylinder into contact with the test piece and continue to move it at 100 mm/min over 15 +1 mm recording any rupturing that occurs 5.4 Expression of results Report the results of the test as cracking or no cracking Test report The test report shall contain the following information: a) a reference to this standard and the method used, i.e EN 435, Method A or B; b) a complete identification of the product tested, including type, source, colour and manufacturer’s reference numbers; c) previous history of the sample; d) for method A, the appearance of cracking, etc, after testing with the specified product mandrel, together with the diameter of the mandrel used; e) for method B, whether or not cracking has occurred; f) any deviation from this standard which may have affected the results Licensed copy: The University of Hong Kong, The University of Hong Kong, Version correct as of 10/03/2009 12:36, (c) BSI ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ blank Licensed copy: The University of Hong Kong, The University of Hong Kong, Version correct as of 10/03/2009 12:36, (c) BSI BS EN 435:1994 National annex NA (informative) Committees responsible The United Kingdom participation in the preparation of this European Standard was entrusted by the Plastics and Rubber Standards Policy Committee (PRM/-) to Technical Committee PRM/60, upon which the following bodies were represented: British Adhesives and Sealants Association British Board of Agrément British Floor Covering Manufacturers’ Association British Railways Board British Rubber Manufacturers’ Association Ltd Consumer Policy Committee of BSI Contract Flooring Association Cork Industry Federation Department of the Environment (Building Research Establishment) Federation of Plastering and Drywall Contractors Institute of Chartered Arbitrators Royal Institute of British Architects ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ © BSI 12-1999 Licensed copy: The University of Hong Kong, The University of Hong Kong, Version correct as of 10/03/2009 12:36, (c) BSI BS EN 435:1994 BSI 389 Chiswick High Road London W4 4AL BSI — British Standards Institution BSI is the independent national body responsible for preparing British Standards It presents the UK view on standards in Europe and at the international level It is incorporated by Royal Charter Revisions British Standards are updated by amendment or 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