1、AECMA PREN*2799 95 I LOL23bl 0008392 280 AECMA STANDARD NORME AECMA AECMA NORM prEN 2799 Edition P 1 April 1995 DIT PAR LASSOCIATION EUROPENNE DES CONSTRUCTEURS DE MATRIEL AROSPATIAL Technopoiis - 175, rue Jean-Jacques Rousseau - F-92138 Issy-les-Moulineaux Cedex - Tl. (1 ) 47.36.98.76 ICs : Descrip
2、tors : ENGLISH VERSION Aerospace series Fluorocarbon rubber (FPM) Low compression set Hardness 90 IRHD Srie arospatiale lastomre fluor (FPMI Faible dformation rmanente aprs compression Duret 90 DIDC Luft- und Raumfahrt Fluorocarbon-Elastomer (FPM) niedriger Druckverformungsrest Hrte 90 IRHD This “Ae
3、rospace Series Prestandard has been drawn up under the responsibility of AECMA IAssociation Europenne des Constructeurs de Matriel Arospatiall. It is published on green paper for the needs of AECMA-Members. It has been technically approved by the experts of the concerned Technical Committee followin
4、g comment by the Member countries. Subsequent to the publication of this Prestandard, the technical content shall not be changed to an extent that interchangeability is affected, physically or functionally, without re-ideniification of the standard. After examination and signature of the AECMA Stand
5、ard Checking Centre (NPS) and formal agreement of the Officiai Services of the Member countries it will be submitted as a draft European Standard to CEN (European Committee for Standardization) for formal vote. Nota - Extra copies can be supplied by B.N.A.E. - Technopolis 54 - 199. rue Jean-Jacques
6、Rousseau - 921 38 ISSY-LESMOUUNEAUX CEDEX Comments should be sent within six months after the date of publication to I Edition approved for publication 1995-04-28 AECMA Technopolis - 175, rue Jean-Jacques Rousseau 921 38 Issy-les-Moulineaux Cedex - FRANCE C 7 Chairman M. Wright AECMA PREN*2799 95 10
7、12311 0008393 117 H Page 3 prEN 2799 : 1995 1 Scope This standard specifies the properties of fluorocarbon rubber (FPMI), low compression set, hardness 90 IRHD, for aerospace applications. f. 2 Normative references IS0 1629 Rubber and latices - Nomenclature IS0 1817 Rubber, vulcanized - Determinatio
8、n of the effect of liquids EN 3207 Aerospace series - Rubber compounds - Technical specification *I 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 t
9、his standard are obtained from standard test specimens. 3.1 Typical use Application requiring a resistance to air, hydrocarbon and synthetic oils, fuels at elevated temperature and low compression set properties. 3.2 Temperature range - Continuous service : from - 20 OC to + 225 OC - Intermittent se
10、rvice : from - 20 OC to + 250 OC 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 block EN2799 I Number of this standard I 6 Technical spe
11、cification EN 3207 1) Symbol as per IS0 1629 2) In preparation at the date of publication of this standard Previous page is blank Properties Hardness Units IRHD Tear strength N/mm Crystallization zompression set after 70 h to 200 OC Point % Page 4 prEN 2799 : 1995 Table 1 - Test methods 1 2 3 Line ,
12、 Reauirements g0+5 *I -4 1 2 3 4 I Densitv I Mdm3 11 * I Tensile strenath 1 MPa 5 11 min. *I 6 7 Elongation at break 1 % 120 min. *) 8 9 10 I Modulus at - % strain I M Pa 11 12 13 Resistance to low temperatures TRI O I OC - 12 max. 14 15 15.1 30 max. “1 15.2 after - h to - OC I 16 Ozone resistance 3
13、zone concentration : ( - - + - ) pphm Elongation of test piece : % rime h Temperature OC Eorrosion and adhesion on metals in a dry atmosphere Time :-h Temperature : - OC Corrosion and adhesion on metals in a damp atmosphere Time -h Temperature : - oc Humidity : - Yo Test fluid 17 18 19 20 20.1 Time
14、-h Temperature : - OC Humidity :-% Test fluid *- 20.2 21 22 23 24 25 26 27 I _, 28 29 “1 Test for batch acceptance. 1) The value determined for each batch shall not differ from that determined at qualification by more than OD3 Mg/rn3. Page 5 prEN 2799 : 1995 2 Table 2 - Tests after exposure to test
15、media Conditions of exposure in test media 1 I Test media I t 3 t-7 Permitted variation of the properties compared to the initial value 171 Volume Mass Tensile strength Elongation at break Hardness 2 Units , % % % % IRHD Liquid B Fluid 101 1 ISl7 I ISl7 Air 70 hi250 OC 70 hi23 OC 70 hi200 OC q I- - 20 max. I I- - 20 max. O -15 +5 k 5 “1 *) Test for batch acceptance. 4&# 1
