1、STD-AECMA PREN b049-004-ENGL 1997 W 1012311 0013Li27 771 I AECMA STANDARD prEN 6049-004 NORME AECMA Edition P 1 AECMA NORM September 1997 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES (AECMA) Gulledelle 94 - B-1200 BRUXELLES - Tel. +32) 2 775 81 1 O - Fax. +32) 2 775 81 1 1 ICs: Desc
2、riptors: ENGLISH VERSION Aerospace series Electrical cables, installation Protection sleeve in meta-aramid fibres Part 004: Braided, tubular, high expandable Product standard Srie arospatiale Luft- und Raumfahrt Cbles lectriques, installation Gaine de protection en fibres mta-aramides Partie 004 : T
3、resse, tubulaire, trs expansible Schutzschlauch aus Meta-Aramidfasern, Elektrische Leitungen, Installation Teil 004: Geflecht, rhrenfrmig, hoch dehnbar Norme de produit Produkt Norm This “Aerospace Series“ Prestandard has been drawn up under the responsibility of AECMA (The European Association of A
4、erospace Industries). 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 following comment by the Member countries. Subsequent to the publication of this Prestandard, the technical content shall not be c
5、hanged to an extent that interchangeability is affected, physically or functionally, without re-identification of the standard. After examination 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
6、draft European Standard to CEN (European Committee for Standardization) for formal vote. Nota - Extra codes can be SUDDhd bv B.N.A.E. - Technooolis 54 - 199. rue Jean-Jacaues Rousseau - 921 38 ISSY-LES-MOULINEAUX CEDEX Comments should be sent within six months after the date of publication to I Edit
7、ion approved for publication 1997-09-30 AECMA Gulledelle 94 8-1 200 BRUXELLES AlBiTF3 Chairman Mr J. Luck aecma 1997 STDmAECMA PREN b049-00LI-ENGL 1977 = 2012311 0033428 bu8 D Page 2 prEN 6049-004 : 1997 Contents list 1 Scope 2 Normative references 3 Terminology 4 Required characteristics 5 Test met
8、hods 6 Designation 7 Marking , STD-AECMA PREN b047-004-ENGL 11777 I10123LL 00113427 544 9 Page 3 prEN 6049-004 : 1997 1 Scope This standard defines the characteristics of high expandable braided tubular mechanical protection sleeves for electrical cable and cable bundles made from Meta-aramid fibres
9、 and provided with a water repelled protection. 2 Normative references EN 3475-601 EN 3475-602 EN 6049-001 EN 6059-1 O0 Aerospace series - Cables, electrical, aircraft use - Test methods - Part 601 : Smoke density 2), Aerospace series - Cables, electrical, aircraft use - Test methods - Part 602 : To
10、xicity *l. Aerospace series - Electrical cables, installation, protection sleeve in Meta- aramid fibres - Part O01 - Technical specification 1. Aerospace series - Electrical cables, installation, protection sleeve - Test methods 1- Part 100 - General. 3 Terminology See EN 6049-001. 4 Required charac
11、teristics 4.1 Composition, dimensions and mass 4.1.1 Composition of the tows Each tow shall be built-up of several groups of multifilament fibres made from Meta-aramid. The number of groups which forms a tow and the width of the tow depends on the braiding configuration (braiding figure and braiding
12、 angle) of the sleeve, see 4.1 -2. The thickness of the tow shall be so that the finished sleeve meet the mechanical and environmental requirements. One length of sleeve shall be built-up of one type of tow. Published as AECMA Prestandard at the date of publication of this standard *) In preparation
13、 at the date of publication of this standard STD-AECMA PREN 6049-004-ENGL 1997 = 3032311 O033430 2bb U Page 4 prEN 6049-004 : 1997 o5 4.1.2 Composition, dimensions and mass of the sleeve 2 2 6 5 65 The composition of the sleeve (braiding figure, braiding angle and tow width) shall be so that the sle
14、eve meet the requirements for dimensions, coverage, expansion range and mass. The coverage shall be 75 % minimum. The braiding figure shall consist of two groups of tows in two directions. The braiding angle between the two groups shall be equal over the length of the sleeve. The maximum difference
15、in length of a sleeve, measured in the delivered condition and measured on a mandrel with the delivered diameter in accordance with EN 6059-202, is f 3 %. 10 15 Figure 1 and table 1 give the composition and the dimensions of the sleeve, 5 5 15 10 13 8 8 24 15 18 Braiding pattern d : inner diameter 2
16、5 40 Figure 1 : Composition of the sleeve 12 12 36 25 24 22 22 60 40 32 Table 1 : Dimensions and mass STD-AECMA PREN b047-00LI-ENGL 1777 W 1012311 0013431 IT2 Page 5 prEN 6049-004 : 1997 4.2 Color and materials 4.2.1 Color Color shall be olive green, code 5. 4.2.2 Materials The material shall be Met
17、a-aramid and meet the requirements as specified in this standard. 4.3 Mechanical properties 4.3.1 Sun light exposure After testing according to EN 6059-301 for 40 hours, the retention of the tensile strength shall be 45 % minimum with respect to the determined values of non-tested tows. 4.3.2 Temper
18、ature range The operation temperature of the protection sleeves shall be : - Maximum : +240 OC, - Minimum : -55 “C. Note : Above +175 OC : loss of water repellent properties. 4.3.3 Resistance to fluids After testing according to EN 6059-303, the retention of the tensile strength shall be 90 % minimu
19、m with respect to the determined values of non-tested tows. 4.3.4 Water absorption To fulfil the requirements for water absorption, the sleeve shall repel water as tested in EN 6059-305 for 6 hours. This test shall be executed after a high temperature exposure test according to EN 6059-302 at +175 “
20、C. 4.3.5 Mould growth After tested in accordance with EN 6059-306, there shall no external deterioration which would affect service use and no mould growth visible to the naked eye. 4.3.6 Tensile strength of tows The tensile force to be applied per dTEX shall not be less than 0,03 N. Degradation of
21、the tensile strength after environmental tests shall be within the limits as mentioned in the relevant paragraph. For this test, unbraided tows of the batch which have been used for braiding of the sleeves may be used. 5 Test methods Test method EN 6059 - 201 The tests shall be carried out as shown
22、in table 3. For the number of samples to be tested, see EN 6049-001. Title Remarks Visual inspection See 4.1 and 4.2.1 Table 2 : Test methods and sanctions EN 6059 - 203 EN 6059 - 301 Coverage See 4.1.2 Sun light exposure See 431 I EN 6059 - 202 I Dimensions and mass I See 4.1.2 EN 6059 - 302 EN 605
23、9 - 303 EN 6059 - 304 High temperature At maximum operating exposure temperature (continue). See 4.3.2 Resistance to fluids See 4.3.3 Flammability EN 6059 - 401 EN 6059 - 402 I EN 6059- 305 I Fluid absorption 1 See 4.3.4 Expansion range See 4.1.2 Bending properties Not applicable I EN 6059 - 306 I M
24、ould growth 1 See 4.3.5 EN 6059 - 403 EN 6059 - 404 EN 6059 - 405 EN 3475 - 601 EN 3475 - 602 Scrape abrasion Tensile strength See 4.3.6 Needle load shall be 10 N Dynamic cut through Smoke density Toxicity Load shall be 30 N 6 Designation EXAMPLE : Description block BRAI DE D, TU BU LAR, HIGH EXPANDABLE Identity block I EN 6049-004 - 02 -5 Size code (see table 1) I Color code (see 4.2.1) 7 Marking For the marking of the packaging, see EN 6049-001,
