ASD-STAN PREN 4708-103-2017 Aerospace series Sleeving heat-shrinkable for binding insulation and identification Part 103 Fluoroelastomer sleeves - Operating temperature - 55 to 200.pdf

1、ASD-STAN STANDARD NORME ASD-STAN ASD-STAN NORM ASD-STAN prEN 4708-103 Edition P 1 May 2017 PUBLISHED BY THE AEROSPACE AND DEFENCE INDUSTRIES ASSOCIATION OF EUROPE - STANDARDIZATION Rue Montoyer 10 - 1000 Brussels - Tel. 32 2 775 8126 - Fax. 32 2 775 8131 - www.asd-stan.org ICS: Descriptors: ENGLISH

2、VERSION Aerospace series Sleeving, heat-shrinkable, for binding, insulation and identification Part 103: Fluoroelastomer sleeves Operating temperature 55 C to 200 C Product standard Luft- und Raumfahrt Wrmeschrumpfender Schlauch zur Befestigung, Isolierung und Identifizierung Teil 103: Fluorpolymer

3、Schlauch Temperaturbereich 55 C und 200 C Produktnorm Srie arospatiale Manchons thermortractables, de jonction, isolement et identification Partie 103 : Gaines base de fluorolastomre Tempratures dutilisation 55 C 200 C Norme de produit This “Aerospace Series“ Prestandard has been drawn up under the

4、responsibility of ASD-STAN (The AeroSpace and Defence Industries Association of Europe - Standardization). It is published for the needs of the European Aerospace Industry. It has been technically approved by the experts of the concerned Domain following member comments. Subsequent to the publicatio

5、n 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 examination and review by users and formal agreement of ASD-STAN, the ASD-STAN prEN will be submitted as a

6、draft European Standard (prEN) to CEN (European Committee for Standardization) for formal vote and transformation to full European Standard (EN). The CEN national members have then to implement the EN at national level by giving the EN the status of a national standard and by withdrawing any nationa

7、l standards conflicting with the EN. ASD-STAN Technical Committee approves that: “This document is published by ASD-STAN for the needs of the European Aerospace Industry. The use of this standard is entirely voluntary, and its applicability and suitability for any particular use, including any paten

8、t infringement arising therefrom, is the sole responsibility of the user.” ASD-STAN reviews each standard and technical report at least every five years at which time it may be revised, reaffirmed, stabilized or cancelled. ASD-STAN invites you to send your written comments or any suggestions that ma

9、y arise. All rights reserved. No parts of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without prior written permission of ASD-STAN. Order details: E-mail: salesasd-stan.or

10、g Web address: http:/www.asd-stan.org/ Edition approved for publication 1st May 2017 Comments should be sent within six months after the date of publication to ASD-STAN Electrical Domain Copyright 2017 ASD-STAN prEN 4708-103:2017 (E) 2 Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 Te

11、rms and definitions . 3 4 Required characteristics 4 5 Quality assurance 11 6 Designation . 11 7 Labelling and packaging . 11 8 Technical specification . 11 Foreword This standard was reviewed by the Domain Technical Coordinator of ASD-STANs Electrical Domain. After inquiries and votes carried out i

12、n accordance with the rules of ASD-STAN defined in ASD-STANs General Process Manual, this standard has received approval for Publication. prEN 4708-103:2017 (E) 3 1 Scope This standard specifies the required characteristics for two types a heat-shrinkable, fluoroelastomer sleeving for use in aircraf

13、t electrical systems at operating temperatures between -55 C and 200 C. Type A Thick wall Type B Thin wall This sleeving has good flexibility, is flame retarded and has a thick wall for mechanical protection. It is for use in areas subject to prolonged contamination by aircraft fuel and fluids with

14、the exception of phosphate ester-based hydraulic fluids. The standard colour is black. These sleevings are normally supplied with internal diameters up to 50 mm for shrink ratios of 2:1. They are available in black only. Sizes other than those specifically listed in this standard may be available. T

15、hese items shall be considered to comply with this standard if they comply with the property requirements listed in Tables 2, 3 and 4 except for dimensions and mass. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable

16、 for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 3909, Aerospace series Test fluids and test methods for electrical and optical components and sub-assemblies EN 470

17、8-001, Aerospace series Sleeving, heat-shrinkable, for binding, insulation and identification Part 001: Technical specification EN ISO 846, Plastics Evaluation of the action of microorganisms (ISO 846) EN ISO 1817, Rubber, vulcanized Determination of the effect of liquids IEC 60684-1, Flexible insul

18、ating sleeving Part 1: Definitions and general requirements 1) IEC 60684-2, Flexible insulating sleeving Part 2: Methods of test 1) IEC 60757, Code for designation of colours 1) 3 Terms and definitions For the purposes of this document, the terms and definitions given in IEC 60684-1 apply. 1) Publis

19、hed by: IEC International Electrotechnical Commission. http:/www.iec.ch/ prEN 4708-103:2017 (E) 4 4 Required characteristics Dimensions and mass 4.1See Tables 1 and 2. Table 1 Type A Dimensional and mass requirements Size code Internal diameter mm Recovered wall thickness Mass per unit length max. E

20、xpanded min. Recovered max. mm g/m 3,2/1,6 3,2 1,6 0,75 0,20 13,8 4,8/2,4 4,8 2,4 0,85 0,20 22,2 6,4/3,2 6,4 3,2 0,90 0,20 29,0 9,5/4,8 9,5 4,8 1,00 0,25 44,1 12,7/6,4 12,7 6,4 1,20 0,30 72,6 19,0/9,5 19,0 9,5 1,45 0,35 125 25,4/12,7 25,4 12,7 1,80 0,45 206 38,0/19,0 38,0 19,0 2,40 0,50 389 51,0/25,

21、4 51,0 25,4 2,80 0,50 580 Table 2 Type B Dimensional and mass requirements Size code Internal diameter mm Recovered wall thickness Mass per unit length max. Expanded min. Recovered max. mm g/m 3,2/1,6 3,2 1,6 0,75 0,20 20,5 4,8/2,4 4,8 2,4 0,90 0,20 26,6 6,4/3,2 6,4 3,2 0,90 0,20 32,7 9,5/4,8 9,5 4,

22、8 0,90 0,20 44,8 12,7/6,4 12,7 6,4 0,90 0,20 57,0 19,0/9,5 19,0 9,5 1,10 0,20 97,0 25,4/12,7 25,4 12,7 1,20 0,30 147 38,0/19,0 38,0 19,0 1,40 0,40 259 51,0/25,4 51,0 25,4 1,70 0,450 409 76,2 / 38,1 76,2 38,1 1,70 0,40 600 prEN 4708-103:2017 (E) 5 Conditions of test 4.2Unless otherwise specified, the

23、 sleeving shall be shrunk in a forced air circulation oven for (5 1) min at 200 C 5 C prior to testing. Tests 4.3See Table 3. prEN 4708-103:2017 (E) 6 Table 3 Tests (1 of 3) Designation of the test IEC 60684-2 Clause or Subclause Requirements Remarks Dimensions internal diameter wall thickness conce

24、ntricity expanded recovered 3 3.1.2 3.3.2 3.3.3 Table 1 and Table 2 Table 1 and Table 2 65 % min. 85 % min. See Clause 33. Density 4 Not applicable See Clause 38. Heat shock Tensile strength Elongation at break 6 19.1 and 19.2 19.1 and 19.2 8 MPa min. 150 % min. Heat at 300 C 5 C Longitudinal change

25、 9 20 Heat the expanded sleeving at 200 C 5 C for (5 1) min. Bending after heating 13 Not applicable See Clauses 6, 39 and 50. Bending at low temperature 14 No cracks shall be visible Condition at 55 C 3 C. For strips, the mandrel shall be no more than 20 times the wall thickness. Full section sleev

26、ing is tested unfilled and the mandrel shall be no more than 20 times the outer diameter. Dimensional stability during storage 16 The dimensions shall be as specified in Table 1 and Table 2. Tensile strength Elongation at break 19.1 and 19.2 19.1 and 19.2 8 MPa min. 250 % min. Use a jaw separation r

27、ate of 100 mm/min. Below 6,5 mm diameter test as sleeving, at 6,5 mm diameter and above test as dumb-bells. Secant modulus at 2 % elongation 19.5 Between 30 MPa and 100 MPa Breakdown voltage 21 Table 3 Volume resistivity at ambient temperature after damp heat 23 23.5.2 23.5.4 1010 m min. 109 m min.

28、prEN 4708-103:2017 (E) 7 Table 3 Tests (2 of 3) Designation of the test IEC 60684-2 Clause or Subclause Requirements Remarks Flame propagation Time of burning Length burned 26 Method C 30 s max. 75 mm max. Oxygen Index 27 Not applicable Transparency 28 Not applicable Corrosion resistance (Tensile st

29、rength and Elongation) 32 Not applicable See Clause 33. Copper corrosion 33 None above the allowable 8 % max. Heat for (16 0,5) h at 175 C 3 C Colour fastness to light 34 The colour contrast between the exposed and unexposed parts of the specimens shall be equal to or less than that of the fastness

30、standard. Fastness standard No. 5 Resistance to selected fluids Tensile strength Elongation at break 36 19.1 and 19.2 19.1 and 19.2 8 MPa min. 200 % min. Use the fluids and test temperatures specified in Table 4. Immersion time (24 1) h Thermal endurance 37 Not applicable See Clause 50. Mass per uni

31、t length 38 Table 1 and Table 2 Heat ageing Tensile strength Elongation at break 39 19.1 and 19.2 19.1 and 19.2 8 MPa min. 150 % min. Heat at 250 C 3 C Water absorption 40 1,0 % max. Restricted shrinkage Visual 41 No cracking or splitting Heat at 150 C 3 C Perform the visual determination only Colou

32、r stability to heat 42 Not applicable See Clause 34. Smoke Index 43 Not applicable Toxicity 44 Not applicable Halogen content 45 Not applicable Acid gas generation 46 Not applicable prEN 4708-103:2017 (E) 8 Table 3 Tests (3 of 3) Designation of the test IEC 60684-2 Clause or Subclause Requirements R

33、emarks Long term ageing Elongation 50 19.1 and 19.2 75 % min. Ageing temperature shall be 200 C 3 C Dynamic shear at ambient temperature 51 Not applicable Dynamic shear at elevated temperature 52 Not applicable Dynamic shear after heat shock and heat ageing 53 Not applicable Rolling drum peel to alu

34、minium 54 Not applicable Aluminium rod dynamic shear 55 Not applicable Sealing 56 Not applicable Adhesive T peel strength 57 Not applicable Fungus resistance Tensile strength Elongation at break EN ISO 846 19.1 and 19.2 19.1 and 19.2 8 MPa min. 250 % min. The test method shall be EN ISO 846, method

35、B. 56 days exposure Shelf life a EN 4708-001 subclause 4.6 The dimensions shall be as specified in Table 1 and Table 2. Condition the sleeving for 36 months at ambient temperature prior to testing; interim measurements shall be made every 12 months Artifical weathering Tensile strength Elongation at

36、 break EN 4708-001 Table 2 7,4 MPa min. 175 % min. a Due to the duration of this test, lack of completion of this test shall not preclude certification of this sleeving. Additional evidence of compliance with this requirement in the interim shall be as agreed between the supplier and/or the approval

37、 authority and/or the customer. Breakdown voltage 4.4The breakdown voltage shall be determined by any of the methods described in 21.2, 21.3 or 21.4 of IEC 60684-2. The central value shall comply with the minimum value in Table 4. The rate of application of the voltage shall be 500 V/s. prEN 4708-10

38、3:2017 (E) 9 Table 4 Requirements for breakdown voltage Nominal recovered wall thickness a mm Breakdown voltage min. kV 0,75 4,5 0,85 5,0 0,90 5,5 1,00 6,0 1,10 6,5 1,20 7,0 1,40 8,5 1,45 8,5 1,70 10,0 1,80 11,0 2,40 14,5 2,80 17,0 a For non-standard wall thicknesses, the electric strength shall be

39、at least that of the next smaller standard wall thickness. For wall thicknesses smaller than 0,45 mm, the electric strength shall be at least 20,0 kV/mm. Resistance to fluids 4.5See Table 5. prEN 4708-103:2017 (E) 10 Table 5 Resistance to selected fluids EN 3909 No. Fluid Family Type Standard or sym

40、bol Immersion temperature 2 C 1a Fuels Gasoline ISO 1817 Liquid B 40 1b Kerosene ISO 1817 Liquid F 70 2a Hydraulic fluids Phosphate based ISO 1817 Liquid 103 2b Silicone based NATO-S-1714 70 2c Mineral based NATO-H-520 OM-18 70 3a Oils Mineral based NATO-O-1176 OMD-90 70 3b Mineral based NATO-O-142

41、50 3c Synthetic based Diester ISO 1817 Liquid 101 100 3d Synthetic based Polyolester NATO-O-160 OX26 50 4a or 4b Cleaning fluids Solvent Isopropanol or Ethanol 23 4c Propanol 25 % White spirit 75 % 23 4d Methylethylketone ASTM-D740 23 4e Detergent MIL-PRF-87937 Type IV 23 4f Sullage AMS 1476B 5 % So

42、lution 23 5a De-icing fluids Runway de-icers Inhibited potassium acetate in water, 50 % 23 5b Aircraft de-icers Ethylene glycol 80 % Water 20 % v/v (AMS 1428) 23 5c Mono-propylene Glycol ISO 11075 ISO 11078 Not applicable 5d NATO-S-745 23 6a Fire extinguishant Not Tested See Note 1. 7a Cooling Avion

43、ic Coolant ISO 1817 Liquid 103 23 NOTE 1 Fire extinguishants not assessed, see EN 3909. prEN 4708-103:2017 (E) 11 5 Quality assurance See EN 4708-001. 6 Designation The sleeving shall be designated as shown in the following example: Description EN publication number EN Type EN Part number Size (expa

44、nded/ recovered internal diameter, in millimetres) Colour Sleeving EN 4708 A 103 12,7/6,4 -BK Any abbreviation for colour shall comply with IEC 60757. Where no abbreviation is given, the colour shall be written in full. 7 Labelling and packaging See EN 4708-001. 8 Technical specification See EN 4708-001.