ASD-STAN PREN 4708-102-2017 Aerospace series Sleeving heat-shrinkable for binding insulation and identification Part 102 Very flexible polymer Operating temperature 75 to 150 Produ.pdf

1、ASD-STAN STANDARD NORME ASD-STAN ASD-STAN NORM ASD-STAN prEN 4708-102 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: 49.060 Descriptors: E

2、NGLISH VERSION Aerospace series Sleeving, heat-shrinkable, for binding, insulation and identification Part 102: Very flexible polymer Operating temperature 75 C to 150 C Product standard Luft- und Raumfahrt Wrmeschrumpfender Schlauch zur Befestigung, Isolierung und Identifizierung Teil 102: Hochflex

3、ibles Polymer Temperaturbereich 75 C und 150 C Produktnorm Srie arospatiale Manchons thermortractables, de jonction, isolement et identification Partie 102 : Polymre trs flexible Tempratures dutilisation 75 C 150 C Norme de produit This “Aerospace Series“ Prestandard has been drawn up under the resp

4、onsibility 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 publication of

5、 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 draf

6、t 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 national st

7、andards 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 patent in

8、fringement 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 may ar

9、ise. 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.org We

10、b 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 4708-102:2017 (E) 2 Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 Terms

11、and definitions . 3 4 Required characteristics 4 5 Quality assurance 10 6 Designation . 10 7 Labelling and packaging . 10 8 Technical specification . 10 Foreword This standard was reviewed by the Domain Technical Coordinator of ASD-STANs Electrical Domain. After inquiries and votes carried out in ac

12、cordance with the rules of ASD-STAN defined in ASD-STANs General Process Manual, this standard has received approval for Publication. prEN 4708-102:2017 (E) 3 1 Scope This standard specifies the required characteristics for a heat-shrinkable, very flexible polymer sleeving for use in aircraft electr

13、ical systems at operating temperatures between 75 C to 150 C. This sleeving has very good flexibility, is flame retarded and has a thick wall for mechanical protection. It is suitable for use as cable protection in areas where wiring is subject to contamination by aircraft fuels and hydraulic fluids

14、. These sleevings are normally supplied with internal diameters up to 102 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. These items shall be considered to comply with this standard if they comply with the

15、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 for its application. For dated references, only the edition cited applies. For unda

16、ted 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 4708-001, Aerospace series Sleeving, heat-shrinkable, for binding, insulation and ident

17、ification Part 001: Technical specification EN ISO 846, Plastics Evaluation of the action of microorganisms (ISO 846) IEC 60684-1, Flexible insulating sleeving Part 1: Definitions and general requirements 1) IEC 60684-2, Flexible insulating sleeving Part 2: Methods of test 1) IEC 60757, Code for des

18、ignation of colours 1) 3 Terms and definitions For the purposes of this document, the terms and definitions given in IEC 60684-1 apply. 1) Published by: IEC International Electrotechnical Commission. http:/www.iec.ch/ prEN 4708-102:2017 (E) 4 4 Required characteristics Dimensions and mass 4.1See Tab

19、le 1. Table 1 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 10,3 4,8/2,4 4,8 2,4 0,85 0,20 16,5 6,4/3,2 6,4 3,2 0,90 0,20 21,6 9,5/4,8 9,5 4,8 1,00 0,25 32,8 12,7/6,4 1

20、2,7 6,4 1,20 0,30 54,0 19,0/9,5 19,0 9,5 1,45 0,35 92,8 25,4/12,7 25,4 12,7 1,80 0,45 154 38,0/19,0 38,0 19,0 2,40 0,50 290 51,0/25,4 51,0 25,4 2,80 0,50 432 76,0/38,0 76,0 38,0 3,20 0,60 724 102,0/51,0 102,0 51,0 3,60 0,70 1 083 Conditions of test 4.2Unless otherwise specified, the sleeving shall b

21、e shrunk in a forced air circulation oven for (5 1) min at 200 C 5 C prior to testing. Tests 4.3See Table 2. prEN 4708-102:2017 (E) 5 Table 2 Tests (1 of 3) Designation of the test IEC 60684-2 Clause or Subclause Requirements Remarks Dimensions internal diameter wall thickness concentricity expanded

22、 recovered 3 3.1.2 3.3.2 3.3.3 Table 1 Table 1 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. 200 % min. Heat at 215 C 5 C Longitudinal change 9 0 % to 10 % max. Heat the expanded sle

23、eving 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 75 C 3 C. For strips, the mandrel shall be no more than 10 times the wall thickness. Full section sleeving is tested unfilled and

24、the mandrel shall be no more than 10 times the outer diameter. Dimensional stability during storage 16 The dimensions shall be as specified in Table 1. Tensile strength Elongation at break Secant modulus at 2 % elongation 19.1 and 19.2 19.1 and 19.2 19.5 12 MPa min. 350 % min. Between 10 MPa and 35

25、MPa Use a jaw separation rate of 100 mm/min. Below 6,5 mm diameter test as sleeving, at 6,5 mm diameter and above test as dumb-bells. Breakdown voltage 21 Table 3 Volume resistivity at ambient temperature after damp heat 23 23.5.2 23.5.4 108 m min. 107 m min. prEN 4708-102:2017 (E) 6 Table 2 Tests (

26、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 strength and Elongation) 32 Not applicable

27、 See Clause 33. Copper corrosion 33 None above the allowable 8 % max. Heat for (16 0,5) h at 150 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 standard. Fastness standard No. 5 Resist

28、ance 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 unit length 38 Table 1 Heat ageing Tensile

29、strength Elongation at break 39 19.1 and 19.2 19.1 and 19.2 10 MPa min. 200 % min. Heat at 160 C 3 C Water absorption 40 1,5 % max. Restricted shrinkage Visual 41 No cracking or splitting Heat at 150 C 3 C Perform the visual determination only Colour stability to heat 42 Not applicable See Clause 34

30、. Smoke Index 43 Not applicable Toxicity 44 Not applicable Halogen content 45 Not applicable Acid gas generation 46 Not applicable prEN 4708-102:2017 (E) 7 Table 2 Tests (3 of 3) Designation of the test IEC 60684-2 Clause or Subclause Requirements Remarks Long term ageing Elongation at break 50 19.1

31、 and 19.2 75 % min Ageing temperature shall be 150 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 aluminium 54 Not applicable Aluminium rod dyna

32、mic 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 12 MPa min 350 % min The test method shall be EN ISO 846, method B. 56 days exposure Shelf life a EN 4708-001

33、 subclause 4.6 The dimensions shall be as specified in Table 1. Condition the sleeving for 60 months at ambient temperature prior to testing; interim measurements shall be made every 12 months. Artificial weathering Tensile strength Elongation at break EN 4708-001 Table 2 8 MPa min 200 % min a Due t

34、o 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 authority and/or the customer. Breakdown voltage 4.4The b

35、reakdown 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 3. The rate of application of the voltage shall be 500 V/s. prEN 4708-102:2017 (E) 8 Table 3 Requirements for breakdown voltage No

36、minal recovered wall thickness a mm Breakdown voltage min. kV 0,50 4,0 0,65 5,5 0,75 6,0 0,85 6,5 0,90 7,0 1,00 8,0 1,15 9,0 1,20 9,5 1,45 11,0 1,80 14,0 2,40 19,0 2,80 22,0 3,20 25,0 3,60 28,0 a For non-standard wall thicknesses, the electric strength shall be at least that of the next smaller stan

37、dard 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 4. prEN 4708-102:2017 (E) 9 Table 4 Resistance to selected fluids EN 3909 No. Fluid Family Type Standard or symbol Immersion temperature 2 C 1a Fuels

38、Gasoline ISO 1817 Liquid B 40 1b Kerosene ISO 1817 Liquid F 40 1c Biofuel Not applicable 2a Hydraulic fluids Phosphate based ISO 1817 Liquid 103 23 2b Silicone based NATO-S-1714 70 2c Mineral based NATO-H-520 OM-18 50 3a Oils Mineral based NATO-O-1176 OMD-90 70 3b Mineral based NATO-O-142 50 3c Synt

39、hetic 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 % Solution 23

40、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 AL-5 23 6a Fire extinguishant Not Tested See Note. 7a Cooling Avionic Coo

41、lant ISO 1817 Liquid 103 23 NOTE Fire extinguishants not assessed, see EN 3909. prEN 4708-102:2017 (E) 10 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 Part number Size (expanded/ recovered internal diameter, in millimetres) Colour Sleeving EN 4708 102 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.