BS EN 2155-2-1993 Specification for test methods for transparent materials for aircraft glazing - Determination of water absorption《飞机窗玻璃用透明材料试验方法规范 吸水性的测定》.pdf

1、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 status of a British Standard UDC 629.73.023.26:620.1:535.695.52BSEN2155-2:1993 This British Standard,

2、 having been prepared under the directionof the Aerospace Standards Policy Committee, waspublished under the authorityof the Standards Boardand 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 commen

3、t 91/74926 DC ISBN 0 580 22063 X 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 Oesterreichisches Normungsinstitut Belgium Inst

4、itut belge de normalisation Denmark Dansk Standardiseringsraad Finland Suomen Standardisoimisliito, r.y. France Association franaise de normalisation Germany Deutsches Institut fr Normung e.V. Greece Hellenic Organization for Standardization Iceland Technological Institute of Iceland Ireland Nationa

5、l Standards Authority of Ireland Italy Ente Nazionale Italiano di Unificazione Luxembourg Inspection du Travail et des Mines Netherlands Nederlands Normalisatie-instituut Norway Norges Standardiseringsforbund Portugal Instituto Portugus da Qualidade Spain Asociacin Espaola de Normalizacin y Certific

6、acin Sweden Standardiseringskommissionen i Sverige Switzerland Association suisse de normalisation United Kingdom British Standards Institution Amendments issued since publication Amd. No. Date CommentsBSEN2155-2:1993 BSI 01-2000 i Contents Page Cooperating organizations Inside front cover National

7、foreword ii Foreword 2 1 Scope and field of application 3 2 Normative references 3 3 Purpose of the method 3 4 Apparatus 3 5 Specimens 3 6 Procedure 3 7 Calculation and expression of results 3 8 Test report 3 National annex NA (informative) Committees responsible Inside back cover National annex NB

8、(informative) Cross-references Inside back coverBSEN2155-2:1993 ii BSI 01-2000 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 transparen

9、t materials for aircraft glazing Part 2 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 necessa

10、ry 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, theEN ti

11、tle page, pages2 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.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2155-2 January 1993

12、 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 Srie arospatiale Mthodes dessais po

13、ur matriaux transparents pour vitrages aronautiques Partie2:Dterminationdelabsorption deau Luft- und Raumfahrt Prfverfahren fr transparente Werkstoffe zur Verglasung von Luftfahrzeugen Teil2:BestimmungderWasseraufnahme This European Standard was approved by CEN on 1993-01-04. CEN members are bound t

14、o 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 Centr

15、al 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 t

16、he 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 UnitedKingdom. CEN European Committee for Standardization Comit Europ

17、en de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1993 Copyright reserved to CEN members Ref. No. EN 2155-2:1993 EEN2155-2:1993 BSI 01-2000 2 Foreword This European Standard has been prepared by the European Association of Aerospace Manufactu

18、rers (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

19、 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 ar

20、e bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom.EN2155-2:1993 BSI 01-2000 3 1 Scope and field of application This standard specif

21、ies 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. 2 Normative references This European Standard incorporates by

22、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 Standa

23、rd 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. 3 Purpose of the method Indication of the behaviour of materials in certain moist conditions. The value

24、s do 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. 4 Apparatus 4.1 Balance with an accuracy of 1 mg. 4.2 Oven which can be maintained at a temperature of (50 2) C. 4.3 Vessel fo

25、r distilled water maintained at(23 0,5) C. 4.4 Desiccator 5 Specimens 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. 6 Procedure Three specimens are dried in an oven

26、for (24 1) h at a temperature of (50 2) C, cooled in a desiccator and each is weighed to the nearest 1 mg (mass m 1 ). 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 w

27、ith 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 1 mg again within one minute of taking them from the water (mass m 2 ). NOTESpecimens of different m

28、aterials are not to be placed into the same container of distilled water. 7 Calculation and expression of results The water absorption of a specimen (m 2 m 1 ) is expressed in milligrammes. The value recorded for the water absorption of the material under test is the arithmetic mean of the values ob

29、tained on the specimens. The measured thicknesses of specimens and the masses m 1and m 2are to be recorded. 8 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 sp

30、ecimens in millimetres and individual values, the average initial mass of specimens in grams and individual values.4 blankBSEN2155-2:1993 BSI 01-2000 National annex NA (informative) Committees responsible The United Kingdom participation in the preparation of this European Standard was entrusted by

31、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 Cor

32、responding British Standard ISO 62:1980 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 wate

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