1、CEN ENx2431 95 81 3404589 OLL2381 652 .I BRITISH STANDARD AEROSPACE SERIES Ethylene-propylene rubber (EPM/EPDM) Hardness 80 IRHD The European Standard EN 2431 : 1995 has the status of a British Standard ICs 49.040.10 BS EN 2431 : 1995 CEN ENx243L 95 3404589 OLL23B2 599 S BS EN 2431 : 1995 Committees
2、 responsible for this British Standard The preparation of this British Standard was entrusted to kchnical Committee ACE/25, Rubber and elastomeric materials for aerospace purposes, upon which the following bodies were represented: British Adhesives and Sealants Association British Hydromechanics Res
3、earch Group British Narrow Fbrics Association British Rubber Manufacturers Association Ltd. Ministry of Defence Society of British Aerospace Companies Limited This British Standard, having been prepared under the direction of the Engineering Sector Board (E/-), was published under the authority of t
4、he Standards Board and Amendments issued since publication comes into effect on 15 November 1995 Amd. No. 0 BSI 1995 The following BSI references relate to the work on this standard: Committee reference ACE/25 Draft for comment 90/79247 DC ISBN O 580 24090 8 Date c Ext affected CEN ENx2431 95 340458
5、9 OlIl12383 425 W BS EN 2431 : 1995 Contents Page Committees responsible Inside front cover National foreword 11 Fore word 2 Specification 1 Scope 3 2 Normative references 3 Application of the material 4 Properties 5 Designation 6 Technical specification 3 ables 1 Test methods 2 Tests after exDosure
6、 to test media 4 5 i CEN EN*i2431 95 3404589 OLL2384 3bL M BS EN 2431 : 1995 National foreword This British Standard has been prepared by %chnical Committee ACE/25, and is the English language version of EN 2431 : 1995, Aerospace Series - Ethylene-propylene rubber (EPM/EPDM) - Hardness 80 IRHD, publ
7、ished by the European Committee for Standardization (CEN) . EN 2431 was produced as a result of international discussion in which the United Kingdom took an active part. Cross-references Publication referred to IS0 1629 : 1987 IS0 1817 : 1985 Corresponding British Standard BS 3502 Symbols fin- plast
8、ics and rubber materials Part 2 : 1991 Schedule for symbols for rubbers. BS 903 Physical testing of rubber Part A16 : 1987 Determination of the effects of liquids The European Standard EN 3207, referred to in clause 2, is in preparation and there is at present no corresponding British Standard. Prel
9、iminary copies of prEN 3207 are available from: BNAE, %chnopolis 54, 199 rue Jean Jacques Rousseau, 92138 Issy les Moulineaux Cedex, Paris, France. Compliance with a British Standard does not of itself confer immunity from legal obligations. ii CEN EN82431 75 340458?7 OLL2385 2TB EUROPEAN STANDARD E
10、N 2431 NORME EUROPENNE EUROPISCHE NORM September 1995 ICs 49.040.10 Descriptors: aircraft industry, rubber, ethylene-propylene rubber, hardness English version Aerospace series Ethylene-propylene rubber (EPM/EPDM) Hardness 80 IRHD Srie arospatiale - lastomre thylne-propylne - (EPM/EPDM) - Duret 80 D
11、IDC Luft- und Raumfahrt - Ethylen- Propylen-Elastomer (EPM/EPDM) - Hrte 80 IRHD This European Standard was approved by CEN on 1995-03-02. CEN members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national
12、 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 ot
13、her 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,
14、 Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels O 1995 Copyright reserved to CE
15、N members Ref. No. EN 2431 : 1995 E CEN ENa243L 95 I 3404589 OLL2386 134 Page 2 EN 2431 : 1995 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, thi
16、s 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 endor
17、sement, at the latest by March 1996, and conflicting national standards shali 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, Gre
18、ece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, United Kingdom. - CEN EN*243L 95 a 3404589 OLL2387 070 Page 3 EN 2431 : 1995 I Scope This standard specifies the properties of ethylene-propylene rubber (EPMEPDM) 1, hardness 80 IRHD, for aerospace a
19、pplications. 2 Nonnative 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
20、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. IS0 1629 Rubber and latices - Nomenclature IS0 1817 EN 3207 Rubber, vulcanized - Deter
21、mination of the effect of liquids Aerospace series - Rubber compounds - Technical specification *) 3 Application of the material The suitability of the material for a specific application shall be determined by complementary tests camed out on the finished product as the properties specified in this
22、 standard are obtained from standard test specimens. 3.1 Typical use Application requiring a resistance to ozone, weather and phosphate ester based hydraulic fluids. NOTE : This material shall not be used for the manufacture of dynamic seals in flight hydraulic systems. 3.2 Temperature range - Conti
23、nuous service : from - 55 C to + 125 C - Intermittent service : from - 55 C to + 160 C 4 Properties See tables 1 and 2. For qualification, all tests shall be performed. For batch acceptance, the tests identified in tables 1 and 2 shall be performed. 5 Designation Description block RUBBER Identity bl
24、ock -T-. Number of this standard 1 6 Technical specification EN 3207 Symbol as per IS0 1629 In preparation at the date of publication of this standard CEN ENx2431 95 m 3404589 0332388 TO7 I 1 Page 4 EN 2431 : 1995 2 Table 1 - Test methods Line 1 2 3 4 5 C - Properties Units Hardness IRHD Density Mg/
25、m3 Tensile strength MPa U 7 8 I Elongation at break % 9 1 Modulus al - % strain 10 11 I Tear strength .CI MPa N/mm IL 13 14 15 15.1 15.2 -h Resistance to low temperatures TR1 O C Crystallization Point Compression set after 70 h to 100 C % afier - h to - C 16 Ozone resistance Ozone concentration : (
26、200 i 20 ) pphm Time Temperature Elongation of test piece : 20 % 168 h 30 C 17 1R - 3 .- 19 20 Requirements 80 i: 7 Corrosion and adhesion on metals in a dry atmosphere Corrosion and adhesion on metals in a damp Time -h Temperature : - C 12 min. *) 150 min. 7 Temperature : - C Humidity -% -h -1 Time
27、 Temperature : - C 20 min. - - - 45 max. - 21 22 23 24 25 26 27 28 39 30 15 max. 9 - Humidity -% I Nil cracking j The value detetmhed for each batch shall not differ from that detetmined at qualification by more than ,0.02 MQ/m3. CEN EN*Z431 i5 6 3404589 OLL2389 i43 I 1 (P U ._ E I 5 O E L VI al c u
28、) C c. .- z) IO I - I D Page 5 EN 2431 : 1995 CEN EN82431 95 BI 3404559 OLL2390 bb5 I BS EN 2431 : 1995 List of references See national foreword. CEN EN*243L 95 I 3404589 OLL2391 5TL - BS EN 2431 : 1995 BSI 389 Chiswick High Road London W4 4AL 9511- 4- 0.5k-FP BSI - British Standards Institution BSI
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