ASD-STAN PREN 4708-106-2017 Aerospace series Sleeving heat-shrinkable for binding insulation and identification Part 106 Limited fire hazard sleeving Operating temperature 30 to 10.pdf

1、ASD-STAN STANDARD NORME ASD-STAN ASD-STAN NORM ASD-STAN prEN 4708-106 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 106: Limited fire hazard sleeving Operating temperature 30 C to 105 C Product standard Luft- und Raumfahrt Wrmeschrumpfender Schlauch zur Befestigung, Isolierung und Identifizierung Teil 106: Schlauch

3、 mit reduziertem Brandverhalten Temperaturbereich 30 C und 105 C Produktnorm Srie arospatiale Manchons thermortractables, de jonction, isolement et identification Partie 106 : Risque dincendie limit Tempratures dutilisation 30 C 105 C Norme de produit This “Aerospace Series“ Prestandard has been dra

4、wn up under the 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 t

5、o 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 examination and review by users and formal agreement of ASD-STAN, the ASD-STAN prEN will be

6、 submitted as a 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 withdra

7、wing any national 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, inc

8、luding any patent 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 sug

9、gestions that may 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:

10、salesasd-stan.org 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 4708-106:2017 (E) 2 Contents Page Foreword 2 1 Scope 3 2 Normative r

11、eferences 3 3 Terms and definitions . 4 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 vot

12、es carried out in accordance with the rules of ASD-STAN defined in ASD-STANs General Process Manual, this standard has received approval for Publication. prEN 4708-106:2017 (E) 3 1 Scope This standard specifies the required characteristics for four types of heat-shrinkable limited fire hazard sleevi

13、ngs for use in aircraft electrical systems at operating temperatures between 30 C and 105 C. This sleeving is flexible, flame retarded and emits minimum smoke, gases and corrosive by-products when exposed to fire. It is available with various wall thicknesses and also in a higher shrink ratio accord

14、ing to the application and degree of mechanical protection required. It is suitable for use (e.g. As cable protection) in areas where smoke, gases or corrosive by-products would constitute a particular hazard. Type A Thick wall shrink ratio 2:1 and is normally supplied with internal diameters up to

15、102,0 mm Type B Medium wall, shrink ratio 2:1 and is normally supplied with internal diameters up to 60,0 mm Type C Thick wall, shrink ratio 2:1 and is normally supplied with internal diameters up to 51,0 mm Type D Medium wall, shrink ratio 3:1 and normally supplied with internal diameters up to 40,

16、0 mm The standard colour is black. Sizes or colours 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 property requirements listed in Tables 5, 6 and 7 except for dimensions and mass. 2 Normati

17、ve 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 undated references, the latest edition of the referenced document (including any amendments) ap

18、plies. 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 identification Part 001: Technical specification EN ISO 846, Plastics Evaluation of the action o

19、f micro-organisms (ISO 846) EN ISO 1817, Rubber, vulcanized Determination of the effect of liquids 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 designation of colours

20、 1) 1) Published by: IEC International Electrotechnical Commission. http:/www.iec.ch/ prEN 4708-106:2017 (E) 4 3 Terms and definitions For the purposes of this document, the terms and definitions given in IEC 60684-1 apply. 4 Required characteristics Dimensions and mass See Tables 1 and 4. Table 1 T

21、ype A 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 0,50 0,10 6,0 4,8/2,4 4,8 2,4 0,50 0,10 8,2 6,4/3,2 6,4 3,2 0,65 0,15 13,5 9,5/4,8 9,5 4,8 0,65 0,15 19,5 12,7/6,4 12,7 6,4 0,

22、65 0,15 25,0 19,0/9,5 19,0 9,5 0,75 0,15 43,0 25,4/12,7 25,4 12,7 0,90 0,15 67,0 38,0/19,0 38,0 19,0 1,00 0,20 112 51,0/25,4 51,0 25,4 1,15 0,25 175 76,0/38,0 76,0 38,0 1,25 0,25 281 Table 2 Type B Dimensional and mass requirements Size code Internal diameter mm Recovered wall thickness Mass per uni

23、t length max. Expanded min. Recovered max. mm g/m 3,0/1,5 3,0 1,5 0,70 0,10 8,5 5,0/2,5 5,0 2,5 0,75 0,15 13,5 8,0/4,0 8,0 4,0 0,80 0,15 21,0 12,0/6,0 12,0 6,0 0,90 0,15 33,0 18,0/9,0 18,0 9,0 1,00 0,20 54,0 24,0/12,0 24,0 12,0 1,10 0,20 77,0 40,0/20,0 40,0 20,0 1,30 0,25 146 60,0/30,0 60,0 30,0 1,5

24、0 0,30 250 prEN 4708-106:2017 (E) 5 Table 3 Type C 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 0,15 9,9 4,8/2,4 4,8 2,4 0,85 0,20 15,8 6,4/3,2 6,4 3,2 0,90 0,20 21,0 9,5/4

25、,8 9,5 4,8 1,00 0,20 32,0 12,7/6,4 12,7 6,4 1,20 0,30 53,6 19,0/9,5 19,0 9,5 1,45 0,35 91,6 25,4/12,7 25,4 12,7 1,80 0,45 155 38,0/19,0 38,0 19,0 2,40 0,50 294 51,0/25,4 51,0 25,4 2,80 0,50 435 Table 4 Type D Dimensional and mass requirements Size code Internal diameter mm Recovered wall thickness M

26、ass per unit length max. Expanded min. Recovered max. mm g/m 3,0/1,0 3,0 1,0 0,60 0,10 5,5 6,0/2,0 6,0 2,0 0,70 0,10 10,5 9,0/3,0 9,0 3,0 0,80 0,15 17,0 12,0/4,0 12,0 4,0 0,85 0,15 23,0 18,0/6,0 18,0 6,0 1,00 0,20 39,0 24,0/8,0 24,0 8,0 1,20 0,20 61,0 40,0/13,0 40,0 13,0 1,25 0,20 98,5 Conditions of

27、 test Unless otherwise specified, the sleeving shall be shrunk in a forced air circulation oven for (5 1) min at 200 C 5 C prior to testing. Tests See Table 5. prEN 4708-106:2017 (E) 6 Table 5 Tests (1 of 3) Designation of the test IEC 60684-2 Clause or Subclause Requirements Remarks Dimensions inte

28、rnal diameter wall thickness concentricity expanded recovered 3 3.1.2 3.3.2 3.3.3 Table 1, 2, 3 and 4 Table 1, 2, 3 and 4 Shrink ratio 2:1 65 % min. Shrink ratio 3:1 60 % min. All types 85 % min. See Clause 33. Density 4 Not applicable See Clause 38. Heat shock Tensile strength Elongation at break 6

29、 19.1 and 19.2 19.1 and 19.2 6 MPa min. 100 % min. Heat at 150 C 5 C Longitudinal change 9 Shrink ratio 2:1 and 3:1Between + 5 % and 10 % 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 s

30、hall be visible Condition at 30 C 3 C. For strips, the mandrel shall be between 20 and 22 times the wall thickness. Full section sleeving is tested unfilled and the mandrel shall be between 20 and 22 times the outer diameter. Dimensional stability during storage 16 The dimensions shall be as specifi

31、ed in Tables 1, 2, 3 and 4. Tensile strength Elongation at break 19.1 and 19.2 19.1 and 19.2 7 MPa min. 200 % min. 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. Secant modulus at 2 % elongation 19.5 Between 40 MPa an

32、d 130 MPa Breakdown voltage 21 Table 6 Volume resistivity - at ambient temperature - after damp heat 23 23.5.2 23.5.4 1010 m min. 109 m min. prEN 4708-106:2017 (E) 7 Table 5 Tests (2 of 3) Designation of the test IEC 60684-2 Clause or Subclause Requirements Remarks Flame propagation Time of burning

33、Length burned 26 Method C 30 s max. 75 mm max. Oxygen Index At ambient temperature 27 27.1 29 At elevated temperature 27.2 250 C min. Corrosion resistance (Tensile strength and Elongation) 32 Not applicable See Clause 33. Copper corrosion 33 None above the allowable 8 % max. Heat for (16 0,5) h at 1

34、75 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. After this test transparent sleevings, type C, shall meet the requirements for transparency. Fastness standard No. 5 Resista

35、nce to selected fluids Tensile strength Elongation at break 36 19.1 and 19.2 19.1 and 19.2 4 MPa min. 100 % min. Use the fluids and test temperatures specified in Table 7. Immersion time (24 1) h Thermal endurance 37 Not applicable See Clause 50. Mass per unit length 38 Tables 1, 2, 3 and 4 Heat age

36、ing Elongation at break 39 19.1 and 19.2 150 % min. Heat at 135 C 3 C Water absorption 40 1,0 % max. Restricted shrinkage Visual 41 No cracking or splitting Perform the visual determination only Colour stability to heat 42 Not applicable See Clause 34. Smoke Index 43 20 max. Toxicity 44 5 max. Halog

37、en content 45 45.1 45.2 0,2 % max. 0,1 % max. Expressed as chlorine prEN 4708-106:2017 (E) 8 Table 5 Tests (3 of 3) Designation of the test IEC 60684-2 Clause or Subclause Requirements Remarks Acid gas generation 46 46.2 pH 3,5 min. pH 10,5 max. PS/mm 10,0 max. Long term ageing Elongation at break 5

38、0 19.1 and 19.2 100 % min. Ageing temperature shall be 105 C 3 C Dynamic shear at ambient temperature 51 Non applicable Dynamic shear at elevated temperature 52 Non applicable Dynamic shear after heat shock and heat ageing 53 Non applicable Rolling drum peel to aluminium 54 Non applicable Aluminium

39、rod dynamic shear 55 Non applicable Sealing 56 Non applicable Adhesive T peel strength 57 Non applicable Fungus resistance Tensile strength Elongation at break EN ISO 846 19.1 and 19.2 19.1 and 19.2 7 MPa min. 200 % min. The test method shall be EN ISO 846, method B. 56 days exposure Shelf life a EN

40、 4708-001 subclause 4.6 The dimensions shall be as specified in Tables 1, 2, 3 and 4. Condition the sleeving for 60 months at ambient temperature prior to testing; interim measurements shall be made every 12 months Artifical weathering Tensile strength Elongation at break EN 4708-001 Table 2 4,9 MPa

41、 min. 140 % 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 authority and/or the customer. Br

42、eakdown voltage The 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 6. The rate of application of the voltage shall be 500 V/s. prEN 4708-106:2017 (E) 9 Table 6 Requirements for

43、 breakdown voltage Nominal recovered wall thickness a mm Breakdown voltage min. kV 0,50 7,0 0,60 9,0 0,65 9,7 0,70 10,5 0,75 11,2 0,80 12,0 0,85 12,7 0,90 13,5 1,00 15,0 1,10 16,5 1,15 17,2 1,20 18,0 1,25 18,7 1,30 19,5 1,40 21,7 1,50 22,5 1,80 27,0 2,40 36,0 2,80 42,0 a For non-standard wall thickn

44、esses, the breakdown voltage shall be at least that of the next smaller wall thickness. For wall thicknesses less than 0,50 mm, the dielectric strength shall be at least 15,0 kV/mm. Resistance to fluids See Table 7. prEN 4708-106:2017 (E) 10 Table 7 Resistance to selected fluids EN 3909 No. Fluid Fa

45、mily Type Standard or symbol Immersion temperature 2 C 1a Fuels Gasoline ISO 1817 Liquid B 40 1b Kerosene ISO 1817 Liquid F 23 1c Bio Fuel Not applicable 2a Hydraulic fluids Phosphate based ISO 1817 Liquid 103 70 2b Silicone based NATO-S-1714 50 2c Mineral based NATO-H-520 OM-18 23 3a Oils Mineral b

46、ased NATO-O-1176 OMD-90 23 3b NATO-O-142 23 3c Synthetic based Diester ISO 1817 Liquid 101 23 3d Synthetic based Polyolester NATO-O-160 OX26 23 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-8793

47、7 Type IV 23 4f Sullage AMS 1476B 5 % Solution in water 23 5a De-icing fluids Runway de-icers Inhibited potassium acetate in water, 50 % 23 5b Aircraft de-icing on ground Ethylene glycol 80 % Water 20 % v/v (AMS 1428) 23 5c Mono-propylene Glycol ISO 11075 ISO 11078 23 5d Aircraft De-icing. Inflight

48、NATO-S-745 AL-5 23 6a Fire extinguishant No tested See Note 1. 7a Cooling Avionic Coolant ISO 1817 Liquid 103 23 NOTE 1 Fire extinguishants not assessed, see EN 3909. prEN 4708-106:2017 (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 (expanded/ recovered internal diameter, in millimetres) Colour Sleeving EN 4708 106 B 12,7/6,4 BK Any abbreviation for colour shall comply with IEC 60757. Where no abbreviation