BS-EN-2261-1995.pdf
BRITISH STANDARD AEROSPACE SERIES BS EN 2261:1995 Silicone rubber (VMQ) Hardness 70 IRHD The European Standard EN 2261:1995 has the status of a British Standard ICS 49.040.10 UDC 678.074:620.1:629.7 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 01:20:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 2261:1995 This British Standard, having been prepared under the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 November 1995 © BSI 11-1999 The following BSI references relate to the work on this standard: Committee reference ACE/25 Draft for comment 94/714387 DC ISBN 0 580 24086 X 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 represented: 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 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 01:20:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 2261:1995 © BSI 11-1999i Contents Page Committees responsibleInside front cover National forewordii Foreword2 1Scope3 2Normative references3 3Application of the material3 4Properties3 5Designation3 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 01:20:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 2261:1995 ii © BSI 11-1999 National foreword This British Standard has been prepared by Technical Committee ACE/25 and is the English language version of EN 2261:1995 Aerospace Series Silicone rubber (VMQ) Hardness 70 IRHD, published by the European Committee for Standardization (CEN). EN 2261 was produced as a result of international discussion 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 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. 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 effect of liquids Summary of pages This 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 inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 01:20:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM EN 2261 September 1995 ICS 49.040.10 Descriptors: Aircraft industry, rubber, silicones, hardness English version Aerospace series Silicone rubber (VMQ) Hardness 70 IRHD Série aérospatiale Élastomère silicone (VMQ) Dureté 70 DIDC Luft- und Raumfahrt Silicon-Elastomer (VMQ) Härte 70 IRHD This European Standard was approved by CEN on 1995-03-02. 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 © 1995 All rights of reproduction and communication in any form and by any means reserved in all countries to CEN and its members Ref. No. EN 2261:1995 E Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 01:20:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 2261:1995 © BSI 11-1999 2 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 March 1996, and conflicting national standards shall be withdrawn at the 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, United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 01:20:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 2261:1995 © BSI 11-19993 1 Scope This standard specifies the properties of silicone rubber (VMQ)1), hardness 70 IRHD, for aerospace applications. 2 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 1629, Rubber and latices Nomenclature. ISO 1817, Rubber, vulcanized Determination of the effect of liquids. 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 standard test specimens. 3.1 Typical use For application as ozone and weather resistant rubber with good thermal properties. NOTEThe ozone resistance test is not required. 3.2 Temperature range 4 Properties See Table 1 and Table 2. 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 °C to + 200 °C Intermittent service:from 55 °C to + 260 °C Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 01:20:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 2261:1995 4 © BSI 11-1999 Table 1 Test methods Line Column 123 PropertiesUnitsRequirements 1HardnessIRHD 70 *) 2 3DensityMg/m31)*) 4 5Tensile strengthMPa5 min.*) 6 7Elongation at break%150 min.*) 8 9Modulus at % strainMPa 10 11Tear strengthN/mm8 min. 12 13Resistance to low temperatures TR10°C 40 max. 14CrystallizationPoint 15Compression set 15.1after70hto150 °C % 40 max.*) 15.2afterhto°C 16 Ozone resistance Ozone concentration: (±)pphm 17Elongation of test piece:% Time:h Temperature:°C 18 Corrosion and adhesion on metals in a dry atmosphere 19Time:h Temperature:°C 20Corrosion and adhesion on metals in a damp atmosphere 20.1 Time:h Temperature:°C Humidity:% 20.2 Time:h Temperature:°C Humidity:% 21 22 23 24 25 26 27 28 29 30 *) Test for batch acceptance 1) The value determined for each batch shall not differ from that determined at qualification by more then 0,02 Mg/m3. +5 4 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 01:20:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 2261:1995 © BSI 11-19995 Table 2 Tests after exposure to test media Line Column 12345 1Test mediaAirOil No. 1 see ISO 1817 Test fluid 101 see ISO 1817 2Conditions of exposure in test mediaUnits70 h/225 °C70 h/150 °C70 h/150 °C 3 Permitted variation of the properties compared to the initial value Volume%+ 10a 0 + 35 0 4Mass% 5Tensile strength% 25 max. 20 max. 6Elongation at break% 40 max. 15 max. 7HardnessIRHD+ 10 10 0 10 8 a Test for batch acceptance Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 01:20:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 6 blank Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 01:20:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 2261:1995 © BSI 11-1999 List of references See national foreword. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 01:20:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 2261:1995 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 revision. Users of British Standards should make sure that they possess the latest amendments or editions. It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover. Tel: 020 8996 9000. Fax: 020 8996 7400. 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