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1、BRITISH STANDARD AEROSPACE SERIES BS EN 2432:1995 Ethylene-propylene rubber (EPM/EPDM) Hardness 90 IRHD The European Standard EN 2432:1995 has the status of a British Standard ICS 49.040.10 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 01:20:17 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS
2、EN 2432:1995 This British Standard, having been prepared under the direction of the Engineering Sector Board (E/-), was published under the authority of the Standards Board and comes into effect on 15 November 1995 BSI 12-1999 The following BSI references relate to the work on this standard: Committ
3、ee reference ACE/25 Draft for comment 92/71311 DC ISBN 0 580 24087 8 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee ACE/25, Rubber and elastomeric materials for aerospace purposes, upon which the following bodies were re
4、presented: British Adhesives and Sealants Association British Hydromechanics Research Group British Narrow Fabrics Association British Rubber Manufacturers Association Ltd. Ministry of Defence Society of British Aerospace Companies Limited Amendments issued since publication Amd. No.DateComments Lic
5、ensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 01:20:17 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 2432:1995 BSI 12-1999i Contents Page Committees responsibleInside front cover National forewordii Foreword2 1Scope3 2Normative references3 3Application of the material3 4Properties3 5Designa
6、tion3 6Technical specification3 Table 1 Test methods4 Table 2 Tests after exposure to test media5 List of referencesInside back cover Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 01:20:17 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 2432:1995 ii BSI 12-1999 National foreword This Briti
7、sh Standard has been prepared by Technical Committee ACE/25 and is the English language version of EN 2432:1995, Aerospace Series Ethylene-propylene rubber (EPM/EPDM) Hardness 90 IRHD, published by the European Committee for Standardization (CEN). EN 2432 was produced as a result of international di
8、scussion in which the United Kingdom took an active part. The European Standard EN 3207, referred to in clause 2, is in preparation and there is at present no corresponding British Standard. Preliminary copies of prEN 3207 are available from BNAE, Technopolis 54, 199 rue Jean Jacques Rousseau, 92138
9、 Issy les Moulineaux Cedex, Paris, France. 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
10、. Cross-references Publication referred toCorresponding British Standard ISO 1629:1987BS 3502 Symbols for plastics and rubber materials Part 2:1991 Schedule for symbols for rubbers ISO 1817:1985BS 903 Physical testing of rubber Part A16:1987 Determination of the effects of liquids Summary of pages T
11、his document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 6, 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 insi
12、de front cover. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 01:20:17 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2432 September 1995 ICS 49.040.10 Descriptors: Aircraft industry, rubber, ethylene-propylene rubber, hardness English versio
13、n Aerospace series Ethylene-propylene rubber (EPM/EPDM) Hardness 90 IRHD Srie arospatiale lastomre thylne-propylne (EPM/EPDM) Duret 90 DIDC Luft- und Raumfahrt Ethylen-Propylen-Elastomer (EPM/EPDM) Hrte 90 IRHD This European Standard was approved by CEN on 1995-03-02. CEN members are bound to comply
14、 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 Secre
15、tariat 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 offic
16、ial 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 Comit Europen de N
17、ormalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1995 Copyright reserved to CEN members Ref. No. EN 2432:1995 E Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 01:20:17 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 2432:1995 BSI 12-1999 2 Fo
18、reword 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 S
19、ervices 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 March 1996, and conflicting national standards shall be withdrawn at the
20、 latest by March 1996. 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
21、, United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 01:20:17 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 2432:1995 BSI 12-19993 1 Scope This standard specifies the properties of ethylene-propylene rubber (EPM/EPDM)1), hardness 90 IRHD, for aerospace applications. 2 Normative r
22、eferences 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
23、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 1629, Rubber and latices Nomenclature. ISO 1817, Rubber, vulcanized Determination of the effect of liquids.
24、EN 3207, Aerospace series Rubber compounds Technical specification2). 3 Application of the material The suitability of the material for a specific application shall be determined by complementary tests carried out on the finished product as the properties specified in this standard are obtained from
25、 standard test specimens. 3.1 Typical use Application requiring a resistance to ozone, weather and phosphate ester based hydraulic fluids. NOTEThis material shall not be used for the manufacture of dynamic seals in flight hydraulic systems. 3.2 Temperature range 4 Properties See Table 1 and Table 2.
26、 For qualification, all tests shall be performed. For batch acceptance, the tests identified in Table 1 and Table 2 shall be performed. 5 Designation 6 Technical specification EN 3207 1) Symbol as per ISO 1629 2) In preparation at the date of publication of this standard Continuous service :from 55
27、C to + 125 C Intermittent service:from 55 C to + 160 C Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 01:20:17 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 2432:1995 4 BSI 12-1999 Table 1 Test methods Line Column 123 PropertiesUnitsRequirements 1HardnessIRHD*) 2 3DensityMg/m3 1) *) 4 5Tensi
28、le strengthMPa11 min. *) 6 7Elongation at break%120 min.*) 8 9Modulus at % strainMPa 10 11Tear strengthN/mm15 min. 12 13Resistance to low temperatures TR10C 30 max. 14CrystallizationPoint 15Compression set 15.1after70hto100C%40 max. *) 15.2afterhtoC 16 17 Ozone resistance Nil cracking Ozone concentr
29、ation Elongation of test piece Time Temperature : : : : (200 20) 20 168 30 pphm % h C 18 19 Corrosion and adhesion on metals in a dry atmosphere Time Temperature : : h C 20 Corrosion and adhesion on metals in a damp atmosphere 20.1 Time Temperature Humidity : : : h C % 20.2 Time Temperature Humidity
30、 : : : h C % 21 22 23 24 25 26 27 28 39 30 *) Test for batch acceptance 1) The value determined for each batch shall not differ from that determined at qualification by more than 0,02 Mg/m3. 90 +3 4 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 01:20:17 GMT+00:00 2006, Uncontrolled Copy, (c
31、) BSI EN 2432:1995 BSI 12-19995 Table 2 Tests after exposure to test media LineColumn 12345 1Test mediaAirTest fluid 103 see ISO 1817 2Conditions of exposure in test mediaUnits70 h/125 C24 h/100 C 3 Permitted variation of the properties compared to the initial value Volume% *) 4Mass% 5Tensile streng
32、th% 15 max. 30 max. 6Elongation at break % 20 max. 20 max. 7HardnessIRHD 8 *) Test for batch acceptance +20 0 +10 0 0 15 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 01:20:17 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 6 blank Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 01:20:17
33、GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 2432:1995 BSI 12-1999 List of references See national foreword. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 01:20:17 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 2432:1995 BSI 389 Chiswick High Road London W4 4AL BSI British Standards I
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