1、STD*AECflA PREN 3475-414-ENGL 1999 E LOL231L 001721b 793 AECMA STANDARD NORME AECMA AECMA NORM prEN 3475-414 Edition P 1 November 1999 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES (AECMA) Guiledelle 94 - 8-1200 BRUXELLES - Tel. (+32) 2 775 81 10 - Fax. (+32) 2 775 81 11 ICs: 49.060
2、Descriptors: ENGLISH VERSION Aerospace series Cables, electrical, aircraft use Test methods Part 414: Differential scanning calorimeter (DSC test) Srie arospatiale Cbles lectriques usage aronautique Mthodes dessais Partie 414: Essai DSC Luft- und Raumfahrt Elektrischen Leitungen fr Luftfahrt Verwend
3、ung Prfverfahren Teil 414: DSC Verfahren This %Aerospace Series“ Prestandard has been drawn up under the responsibility of AECMA (The European Association of Aerospace Industries). It is published on green paper for the needs of AECMA-Members. It has been technically approved by the experts of the c
4、oncerned Technical Committee following 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-identification of the standard. After examina
5、tion and signature of the AECMA Standard Checking Centre (NPS) and formal agreement of the Official 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. - Te
6、chnopolis 54 - 199, rue Jean-Jacques Rousseau - 92138 ISSY-LES-MOULINEAUX CEDEX Edition approved for publication Comments should be sent within six months after the date of publication to 1999-1 1-30 AECMA Gulledelle 94 B-1200 BRUXELLES C2 Chairman Mr Peuetta aecma 1999 STD-AECMA PREN 3475-4L4-ENGL
7、L999 LOL23iiL 0037237 b2T m Page 3 prEN 3475-414: 1999 1 Scope This standard specifies a method of measuring the level of sintering of a PTFE tape on a finished cable. It shall be used together with EN 3475-100 and ASTM-D-4591-97. 2 Normative references This European Standard incorporates by dated o
8、r 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
9、when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 3475-100 Aerospace series - Cables, electrical, aircraft use - Test methods - Part 100: General 1) ASTM-D-4591-97 Standard methods of testing differential scanning c
10、alorimeter 2) 3 Preparation of a specimen In accordance with ASTM-D-4591-97 4 Apparatus In accordance with ASTM-D-4591-97 5 Method 5.1 Procedure In accordance with ASTM-D-4591-97 Temperature range for testing: from 270 “C to 380 “C Temperature range for the calculation of the melting point energy: f
11、rom 290 “C to 360 “C 5.2 Requirements To achieve an acceptable PTFE tape sintering: - the melting point temperature shall be (327 f 4) “C with a 15 Jg to 25 J/g energy; - the recrystallization temperature shall be 310 “C minimum; - the second melting point shall not exceed an energy of 25 J/g. The m
12、anufacturer shall record in the test report which DSC apparatus have been used. NOTE: The values recorded in the qualification test report shall be taken for reference of the manufacturing process. If it is necessary to carry out test on production cable, test shall be made with the same DSC apparatus and the values shall be compared to the reference values. 1) Published as AECMA Prestandard at the date of publication of this standard 2) Published by: American Society For Testing and Materials (ASTM), 1916 Race St., Philadelphia PA 19103, USA.
