1、ASD-STAN STANDARD NORME ASD-STAN ASD-STAN NORM ASD-STAN prEN 4708-301 Edition P 1 July 2016 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 301: Adhesive lined polyolefin sleevings Operating temperature 55 C to 105 C Product standard Luft- und Raumfahrt Wrmeschrumpfender Schlauch zur Befestigung, Isolierung und Identifizierung Teil 301:
3、Innenbeschichtete Polyolefin-Formteile Temperaturbereich 55 C bis 105 C Produktnorm Srie arospatiale Manchons thermortractables, de jonction, isolement et identification Partie 301: Gaine en polyolfine avec revtement dun adhsif Temprature dutilisation 55 C 105 C Norme de produit This “Aerospace Seri
4、es“ Prestandard has been drawn 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 m
5、ember comments. 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 examination and review by users and formal agreement of ASD-STA
6、N, the ASD-STAN prEN will be 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 nati
7、onal standard and by withdrawing 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
8、 for any particular use, including 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
9、 written comments or any suggestions 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-S
10、TAN. Order details: E-mail: salesasd-stan.org Web address: http:/www.asd-stan.org/ Edition approved for publication 1st July 2016 Comments should be sent within six months after the date of publication to ASD-STAN Electrical Domain Copyright 2016 ASD-STAN prEN 4708-301:2016 (E) 2 Contents Page Forew
11、ord 2 1 Scope 3 2 Normative references 3 3 Terms and definitions . 3 4 Required characteristics 4 5 Quality assurance 9 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 Dom
12、ain. After inquiries and votes 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 4708-301:2016 (E) 3 1 Scope This standard specifies the required characteristics for heat-shrinkable adhesive lin
13、ed polyolefin sleevings for use in aircraft electrical systems at operating temperatures between 55 C and 105 C. The sleeving consists of an outer layer being of a flexible cross-linked polyolefin. The inner wall consists of a hot melt adhesive that flows and fuses during the shrinking process to pr
14、ovide a bond that is suitable where an environmental seal is required. These sleevings are normally supplied with internal diameters up to 40 mm for shrink ratios of 3:1 and up to 52 mm for shrink ratios of 4:1. These sleevings are normally supplied in colour black. Sizes or colours other than those
15、 specifically listed in this standard may be available as custom items. These items shall be considered to comply with this standard if they comply with the property requirements listed in Table 3 and Table 5 except for dimensions and mass. 2 Normative references The following documents, in whole or
16、 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) applies. EN 3909, Aerospace series Test fluids for e
17、lectrical and optical components and sub-assemblies EN 4708-001, Aerospace series Sleeving, heat-shrinkable, for binding, insulation and identification Part 001: Technical specification EN 6059-304, Aerospace series Electrical cables, installation Protection sleeve Test methods Part 304: Flammabilit
18、y IEC 60684-1:2011, Flexible insulating sleeving Part 1: Definitions and general requirements 1) IEC 60684-2:2005, Flexible insulating sleeving Part 2: Methods of test 1) IEC 60757:1983, Code for designation of colours 1) ISO 846:1997, Plastics Evaluation of the action of micro-organisms ISO 1817:20
19、05, Rubber, vulcanized Determination of the effect of liquids MIL-PRF-87937, Performance specification: cleaning compound, aerospace equipment 2) AMS 1476B:2004, Deodorant, Aircraft Toilet 3) 3 Terms and definitions For the purposes of this document, the terms and definitions given in IEC 60684-1 ap
20、ply. 1) Published by: IEC International Commission Electrotechnique Internationale. http:/www.iec.ch/ 2) Published by: Department of Defense (DoD). http:/www.defenselink.mil/ 3) Published by: SAE National (US) Society of Automotive Engineers. http:/www.sae.org/ prEN 4708-301:2016 (E) 4 4 Required ch
21、aracteristics 4.1 Dimension and mass See Table 1 and Table 2. Table 1 Dimensional and mass requirements shrink ratio 3:1 Size code Internal diameter mm Recovered total wall thickness mm Recovered meltable wall thickness mm Mass per unit length max. g/m Expanded min. Recovered max. Nominal 3/1 3 1 1,
22、0 0,30 0,5 7,2 4,5/1,5 4,5 1,5 1,0 0,30 0,5 8,3 6/2 6 2 1,0 0,30 0,6 10,9 9/3 9 3 1,4 0,30 0,6 17,7 12/4 12 4 1,8 0,40 0,8 32,7 19/6 19 6 2,2 0,60 0,8 67,3 24/8 24 8 2,5 0,60 1,0 87 40/13 40 13 2,5 0,60 1,0 130,4 Table 2 Dimensional and mass requirements shrink ratio 4:1 Size code Internal diameter
23、mm Recovered total wall thickness mm Recovered meltable wall thickness mm Mass per unit length max. g/m Expanded min. Recovered max. Nominal 4/1 4 1 1,0 0,30 0,5 7,2 8/2 8 2 1,0 0,30 0,5 10,9 12/3 12 3 1,4 0,30 0,6 17,7 16/4 16 4 1,8 0,40 0,8 32,7 24/6 24 6 2,2 0,60 0,8 67,3 32/8 32 8 2,5 0,60 1,0 8
24、7 52/13 52 13 2,5 0,60 1,0 130,4 4.2 Conditions of 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. prEN 4708-301:2016 (E) 5 4.3 Tests See Table 3. Table 3 Tests (1 of 3) Designation of the test IEC 60684-2 C
25、lause or subclause Requirements Remarks Dimensions 3 internal diameter 3.1.2 Table 1 and Table 2 wall thickness 3.3.2 Table 1 and Table 2 concentricity 3.3.3 expanded Shrink ratio 3:1 60 % min. Shrink ratio 4:1 50 % min. recovered All types 85 % min. Density 4 Not applicable See Clause 38 Heat shock
26、 6 Heat at 200 C 5 C Tensile strength 19.1 and 19.2 7 MPa min. Elongation at break 19.1 and 19.2 150 % min. Longitudinal change 9 Shrink ratio 3:1between +1 % and 15 % Shrink ratio 4:1between +1 % and 20 % Heat the expanded sleeving at 200 C 5 C for (5 1) min. Bending after heating 13 Not applicable
27、 See Clauses 6, 39 and 50 Bending at low temperature 14 No cracks shall be visible Condition at 55 C 3 K. For strips, the mandrel shall be between 15 and 17 times the wall thickness. Full section sleeving is tested unfilled and the mandrel shall be between 20 and 22 times the outer diameter. Dimensi
28、onal stability during storage 16 The dimensions shall be as specified in Table 1 and Table 2 Tensile strength 19.1 and 19.2 9 Mpa 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. Elongation at break 19.1 and 19.2 2
29、00 % min. Secant modulus at 2 % elongation 19.4 40 Mpa min. 175 Mpa max. Breakdown voltage 21 Table 5 Volume resistivity 23 at ambient temperature 23.4.2 1011 m min. after damp heat 23.4.4 10 10 m min. Flammability EN 6059-304 Method 2 Clause 6.2 Method in accordance EN 6059-304 Test size 10/8 on 10
30、 mm diameter tube Oxygen ndex 27 Not Applicable prEN 4708-301:2016 (E) 6 Table 2 Tests (2 of 3) Designation of the test IEC 60684-2 Clause or subclause Requirements Remarks Corrosion resistance (Tensile strengh and Elongation) 32 Not applicable Copper corrosion 33 Not applicable Colour fastness to l
31、ight 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 Resistance to selected fluids Tensile strength Elongation at break 36 19.1 and 19.2 19.1 and 19.2 7 MPa min. 200 % min. Use the f
32、luids and test temperatures specified in Table 6 Immersion time (24 1) h Thermal endurance 37 Not applicable See Clause 50 Mass per unit 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 7 MPa min. 150 % min. Heat at 150 C 3 C Water absorpt
33、ion 40 0,5 % Total wall Restricted shrinkage Visual 41 Not applicable Colour stability to heat 42 Not applicable Smoke Index 43 Not applicable Toxicity 44 Not applicable Halogen content 45 Not applicable Acid gas generation 46 Not applicable Dynamic shear at ambient temperature 51 Not applicable Dyn
34、amic shear at elevated temperature 52 Not applicable Dynamic shear after heat shock and heat ageing 53 Not applicable Rolling drum peel to aluminium 54 60N/25 mm Test size 24/8. Condition for (10 1) min. at 150 C 5 C Aluminium rod dynamic shear 55 Not applicable Sealing 56 Not applicable Adhesive T
35、peel strength 57 Not applicable Long term ageing 50 350 N Ageing temperature shall be 105 C 3 C Aluminium rod dynamic shear 55 Test size 24/8 with a rod diameter of 10 mm prEN 4708-301:2016 (E) 7 Table 2 Tests (3 of 3) Designation of the test IEC 60684-2 Clause or subclause Requirements Remarks Fung
36、us resistance Tensile strength Elongation at break 19.1 and 19.2 19.1 and 19.2 9 MPa min. 200 % min. The test method shall be ISO 846, method B 56 days exposure Shelf life a EN 4708-001 Clause 4.7 The dimensions shall be as specified in Table 1 and Table 2 Condition the sleeving for 60 months at amb
37、ient temperature prior to testing; interim measurements shall be made every 12 months Artifical weathering Tensile strength Elongation at break EN 4708-001 Table 2 5 MPa min. 100 % min. Elevated temperature performance Clause 5 3 mm max. 105 C a Due to the duration of this test, lack of completion o
38、f 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. 4.4 Elevated temperature performance test Three specimens for each size as
39、detailed in Table 1 shall be tested. (100 2) mm lengths of expanded sleeving shall be cut and recovered, according to manufacturers/suppliers recommendations, onto the appropriate size of stepped mandrel as detailed in Figure 1. After recovery onto the stepped mandrel the assembly shall be allowed t
40、o cool to ambient temperature and the lengths of sleeving over the masking tape shall be removed. The assembly shall then been conditioned for (24 0,5) hours in an oven at the temperature specified in Table 3. On removal from the oven the assembly shall be allowed to cool to ambient temperature and
41、any movement of the sleeving away from the masking tape on the Y diameter shall be measured as specified in Table 8 to an accuracy of 1 mm. All measurements shall be recorded and the result is the mean of the three measurements. prEN 4708-301:2016 (E) 8 Key 1 Masking tape 2 Sleeving 3 Aluminium step
42、ped mandrel according with Table 4 4 Masking tape Figure 1 Test assembly for elevated temperature performance Table 4 Size of stepped mandrel for elevated temperature performance test Type Size Diameters (mm) X Y Shrink ratio 3:1 24/8 8,0 0,1 20 1 Shrink ratio 4:1 32/8 8,0 0,1 26 1 4.5 Breakdown vol
43、tage 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 5. The rate of application of the voltage shall be 500 V/s. Table 5 Requirements for breakdown voltage Nominal recovered
44、 wall thickness a mm Breakdown voltage min. kV 1,00 15 1,10 16 1,40 21 1,80 23 2,20 24 2,50 25 a For non-standard wall thicknesses, the electric strength shall be at least that of the next smaller standard wall thickness. For wall thicknesses smaller than 1,0 mm, the electric strength shall be at le
45、ast 15,0 kV/mm. prEN 4708-301:2016 (E) 9 4.6 Resistance to Fluids See Table 6. Table 6 Resistance to selected fluids EN 3909 No. Fluid Family Type Test fluid to be used Immersion temperature 2 C 1a Fuels Gasoline ISO 1817 Liquid B 23 1b Kerosene ISO 1817 Liquid F 23 2a Hydraulic fluids Phosphate bas
46、e ISO 1817 Liquid 103 23 2b Silicone base NATO-S-1714 23 2c Mineral base NATO-H-520 23 3a Oils Mineral base NATO-O-1176 23 3b NATO-O-142 23 3c Synthetic base Diester ISO 1817 Liquid 101 23 3d Synthetic base Polyol ester NATO-O-160 23 4a 4b Cleaning fluids Solvent Isopropanol or Ethanol 23 4c Propano
47、l 25 % White spirit 75 % 23 4d Methylethylketone 23 4e Detergent MIL-PRF-87937 Type IV 23 4f Sullage AMS 1476 5 % Solution 23 5a De-icing fluids Runway de-icers 50 % inhibited potassium acetate in water 23 5b Aircraft de-icers Ethylene glycol 80 % Water 20 % v/v 23 5d NATO-S-745-AL-5 23 6 Fire extin
48、guishant Not Tested See Note. 7a Cooling Avionic Coolant ISO 1817 Liquid 103 23 NOTE Fire extinguishants not assessed, see EN 3909. 5 Quality assurance See EN 4708-001. prEN 4708-301:2016 (E) 10 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 301 24/8 BK Any abbreviation for colour shall comply with IEC 60757. Where no abbreviation is given, the colour shall be written in full. 7 Labellin
