BRITISH STANDARD AEROSPACE SERIES BS EN 2155 2 1993 Test methods for transparent materials for aircraft glazing — Part 2 Determination of water absorption The European Standard EN 2155 2 1993 has the[.]
BRITISH STANDARD AEROSPACE SERIES Test methods for transparent materials for aircraft glazing — Part 2: Determination of water absorption The European Standard EN 2155-2:1993 has the status of a British Standard UDC 629.73.023.26:620.1:535.695.52 BS EN 2155-2:1993 BS EN 2155-2:1993 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 This British Standard, having been prepared under the direction of the Aerospace Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 15 March 1993 © BSI 01-2000 The following BSI references relate to the work on this standard: Committee reference ACE/62 Draft for comment 91/74926 DC ISBN 580 22063 X Oesterreichisches Normungsinstitut Institut belge de normalisation Dansk Standardiseringsraad Suomen Standardisoimisliito, r.y Association franỗaise de normalisation Deutsches Institut fỹr 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 BS EN 2155-2:1993 Contents Cooperating organizations National foreword Foreword Scope and field of application Normative references Purpose of the method Apparatus Specimens Procedure Calculation and expression of results Test report National annex NA (informative) Committees responsible National annex NB (informative) Cross-references © BSI 01-2000 Page Inside front cover ii 3 3 3 3 Inside back cover Inside back cover i BS EN 2155-2:1993 National foreword This British Standard has been prepared under the direction of the Aerospace Standards Policy Committee and is the English language version of EN 2155-2:1993, Aerospace series — Test methods for transparent materials for aircraft glazing — Part Determination of water absorption, published by the European Committee for Standardization (CEN) EN 2155-2 was produced as a result of international discussion in which the UK took an active part 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 ii © BSI 01-2000 EN 2155-2 EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM January 1993 UDC 629.73.023.26:620.1:535.695.52 Descriptors: Aircraft industry, glazing, transparent plastics, glass, water, absorption tests English version Aerospace series Test methods for transparent materials for aircraft glazing Part 2: Determination of water absorption Série aérospatiale — Méthodes d’essais pour matériaux transparents pour vitrages aéronautiques Partie 2: Détermination de l’absorption d’eau Luft- und Raumfahrt — Prüfverfahren für transparente Werkstoffe zur Verglasung von Luftfahrzeugen Teil 2: Bestimmung der Wasseraufnahme This European Standard was approved by CEN on 1993-01-04 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 CEN European Committee for Standardization Comité Européen de Normalisation Europäisches Komitee für Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels © 1993 Copyright reserved to CEN members Ref No EN 2155-2:1993 E EN 2155-2:1993 Foreword This European Standard has been prepared by the European Association of Aerospace Manufacturers (AECMA) After inquiries and votes carried out in accordance with the rules of this Association, this standard has successively received the approval of the National Associations and the Official Services of the member countries of AECMA, prior to its presentation to CEN 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 July 1993, and conflicting national standards shall be withdrawn at the latest by July 1993 According to 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 © BSI 01-2000 EN 2155-2:1993 Scope and field of application This standard specifies the method used for the determination of the water absorption by means of immersion in conformance with ISO 62, method 1, applicable for transparent materials In addition, it specifies the particular conditions for aircraft glazing Normative references This European Standard incorporates by dated or undated reference, provisions from other publications These normative references are cited at the appropriate places in the text and the publications are listed hereafter For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision For undated references the latest edition of the publication referred to applies ISO 62:1980, Plastics — Determination of water absorption Purpose of the method Indication of the behaviour of materials in certain moist conditions The values not represent the maximum amount of water that can be absorbed The absorption of water can affect the dimensions and the electrical, thermal and mechanical properties Apparatus 4.1 Balance with an accuracy of mg 4.2 Oven which can be maintained at a temperature of (50 ± 2) °C 4.3 Vessel for distilled water maintained at (23 ± 0,5) °C 4.4 Desiccator Specimens Procedure Three specimens are dried in an oven for (24 ± 1) h at a temperature of (50 ± 2) °C, cooled in a desiccator and each is weighed to the nearest mg (mass m1 ) They are then placed in distilled water maintained at a temperature of (23 ± 0,5) °C Precautions are taken to prevent specimens from making contact over any substantial area, either with one another or with the container After (24 ± 1) h they are taken from the water and all surface water removed with a clean dry cloth or with filter paper The specimens are weighed to the nearest mg again within one minute of taking them from the water (mass m 2) NOTE Specimens of different materials are not to be placed into the same container of distilled water Calculation and expression of results The water absorption of a specimen (m2 – m1 ) is expressed in milligrammes The value recorded for the water absorption of the material under test is the arithmetic mean of the values obtained on the specimens The measured thicknesses of specimens and the masses m1 and m are to be recorded Test report The test report shall include the following information: — reference to this standard, — the average water absorption in milligrams and individual values, — the average thickness of specimens in millimetres and individual values, — the average initial mass of specimens in grams and individual values The specimen shall be (50 ± 1) mm square with a thickness of (3,0 ± 0,2) mm machined from the sheet under test Cut or machined surfaces shall be smooth and shall not show any burring © BSI 01-2000 blank BS EN 2155-2:1993 National annex NA (informative) Committees responsible The United Kingdom participation in the preparation of this European Standard was entrusted by the Aerospace Standards Policy Committee (ACE/-) to Technical Committee ACE/62 upon which the following bodies were represented: British Plastics Federation Ministry of Defence Society of British Aerospace Companies Limited National annex NB (informative) Cross-references Publication referred to ISO 62:1980 Corresponding British Standard BS 2782 Methods of testing plastics Methods 430A to 430D:1983 Determination of water absorption at 23 °C Determination of water absorption at 23 ° C with allowance for water-soluble matter Determination of boiling water absorption Determination of boiling water with allowance for water-soluble matter © BSI 01-2000 BS EN 2155-2:1993 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 revision Users of British 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