ASD-STAN PREN 4708-104-2016 Aerospace series Sleeving heat-shrinkable for binding insulation and identification Part 104 Semi-rigid polyvinylidene fluoride (PDVF) Operating tempera.pdf

1、ASD-STAN STANDARD NORME ASD-STAN ASD-STAN NORM ASD-STAN prEN 4708-104 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 104: Semi-rigid polyvinylidene fluoride (PDVF) Operating temperature 55 C to 175 C Product standard Luft- und Raumfahrt Wrmeschrumpfender Schlauch zur Befestigung, Isolierung und Identifizierung Teil

3、 104: Halbsteif, Polyvenylidenfluorid (PVDF) Temperaturbereich 55 C bis 175 C Produktnorm Srie arospatiale Manchons thermortractables, de jonction, isolement et identification Partie 104 : Semi-rigide polyvinylidene fluoride (PVDF) Temprature dutilisation 55 C 175 C Norme de produit This “Aerospace

4、Series“ 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 followi

5、ng member 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

6、-STAN, 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

7、national 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 suitabi

8、lity 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

9、your 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 A

10、SD-STAN. 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 4708-104:2016 (E) 2 Contents Page F

11、oreword 2 1 Scope 3 2 Normative references 3 3 Terms and definitions . 3 4 Required characteristics 4 5 Quality assurance 8 6 Designation . 9 7 Labelling and packaging . 9 8 Technical specification . 9 Foreword This standard was reviewed by the Domain Technical Coordinator of ASD-STANs Electrical Do

12、main. 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 4708-104:2016 (E) 3 1 Scope This standard specifies the required characteristics for a heat-shrinkable, semi-rig

13、id polyvinylidene sleeving for use in aircraft electrical systems at operating temperatures between 55 C and 175 C. This sleeving is basically transparent, but may be tinted. It is semi-rigid, tough and abrasion resistant, and is suitable for use where strain relief and mechanical protection are req

14、uired, or where their transparent properties are desirable. These sleevings are normally supplied with internal diameters up to 25,4 mm for shrink ratios of 2:1. Sizes other than those specifically listed in this standard may be available. These items shall be considered to comply with this standard

15、 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 for its application. For dated references, only the editio

16、n cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 3909, Aerospace series Test fluids for electrical and optical components and sub-assemblies EN 4708-001, Aerospace series Sleeving, heat-shrinkable, for binding, insulation a

17、nd identification Part 001: Technical specification 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 Evalu

18、ation of the action of micro-organisms ISO 1817:2005, 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,

19、 the terms and definitions given in IEC 60684-1 apply. 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:/w

20、ww.sae.org/ prEN 4708-104:2016 (E) 4 4 Required characteristics 4.1 Dimension and mass See Table 1. Table 1 Dimensional and mass requirements Size code Internal diameter mm Recovered wall thickness mm Mass per unit length max. g/m Expanded min. Recovered max. 1,2/0,6 1,2 0,6 0,25 0,05 1,5 1,6/0,8 1,

21、6 0,8 0,25 0,05 1,9 2,4/1,2 2,4 1,2 0,25 0,05 2,5 3,2/1,6 3,2 1,6 0,25 0,05 3,2 4,8/2,4 4,8 2,4 0,25 0,05 4,6 6,4/3,2 6,4 3,2 0,30 0,10 8,1 9,5/4,8 9,5 4,8 0,30 0,10 11,8 12,7/6,4 12,7 6,4 0,30 0,10 15,4 19,0/9,5 19,0 9,5 0,45 0,10 31,2 25,4/12,7 25,4 12,7 0,50 0,10 45,1 4.2 Conditions of test Unles

22、s 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. 4.3 Tests See Table 2. prEN 4708-104:2016 (E) 5 Table 2 Tests (1 of 3) Designation of the test IEC 60684-2 Clause or subclause Requirements Remarks Dimensions 3 internal

23、 diameter 3.1.2 Table 1 wall thickness 3.3.2 Table 1 concentricity 3.3.3 expanded 65 % min. recovered 85 % min. Density 4 Not applicable See Clause 38. Heat shock 6 Heat at 250 C 5 C Tensile strength 19.1 and 19.2 15 MPa min. Elongation at break 19.1 and 19.2 75 % min. Longitudinal change 9 0 to -10

24、 % max 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 10 times the wall thickness. Full section slee

25、ving is tested unfilled and 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 19.1 and 19.2 35 MPa min. Use a jaw separation rate of 100 mm/min. Below 6,5 mm diameter test as sleevi

26、ng, at 6,5 mm diameter and above test as dumb-bells. Elongation at break 19.1 and 19.2 150 % min. Secant modulus at 2 % elongation 19.4 Between 250 MPa and 750 MPa Breakdown voltage 21 Table 3 Volume resistivity 23 at ambient temperature 23.4.2 109 m min. after damp heat 23.4.4 10 8 m min. Flame pro

27、pagation Time of burning Length burned 26 Method C 15 s max. 75 mm max. Oxygen index 27 Not applicable Transparency 28 Print shall be eligible Transparent only prEN 4708-104:2016 (E) 6 Table 2 Tests (2 of 3) Designation of the test IEC 60684-2 Clause or subclause Requirements Remarks Corrosion resis

28、tance (Tensile strengh 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 o

29、f 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 25 MPa min. 50 % min. Use the fluids and test temperatures specified in Table 4. Immersion time (24 1) h Thermal endurance 37 Not applicable See Clause 5

30、0 Mass per unit length 38 Table 1 Heat ageing Tensile strength Elongation at break 39 19.1 and 19.2 19.1 and 19.2 15 MPa min. 75 % min. Heat at 200 C 5 C Water absorption 40 0,5 % max. Restricted shrinkage Visual 41 No cracking or splitting Heat at 225 C 5 C Perform the visual determination only Col

31、our 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 generatiion 46 Not applicable Long term ageing Elongation 50 19.1 and 19.2 100 % min. Ageing temperature shall be 175 C 3 C Dynamic shear at ambie

32、nt 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 dynamic shear 55 Not applicable Sealing 56 Not applicable Adhesive T peel strength

33、57 Not applicable prEN 4708-104:2016 (E) 7 Table 2 Tests (3 of 3) Designation of the test IEC 60684-2 Clause or subclause Requirements Remarks Fungus resistance Tensile strength Elongation at break 19.1 and 19.2 19.1 and 19.2 35 MPa min. 150 % min. The test method shall be ISO 846, method B. 56 days

34、 exposure Shelf life a EN 4708-001 Clause 4.7 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. Artifical weathering Tensile strength Elongation at break EN 4708-001 Table

35、 2 24 MPa min. 105 % 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 cus

36、tomer. 4.4 The breakdown voltage The breakdown voltage shall be determined by any of the methods described in 21.2, 21.3 and 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. Table 3 Requirements for breakd

37、own voltage Nominal recovered wall thickness a mm Breakdown voltage min. kV 0,25 5,0 0,30 6,0 0,45 9,0 0,50 10,0 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 0,45 mm, the electric stre

38、ngth shall be at least 20,0 kV/mm. prEN 4708-104:2016 (E) 8 Table 4 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 40 1b Kerosene ISO 1817 Liquid F 40 2a Hydraulic fluids Phosphate base ISO 1817 Liquid 1

39、03 23 2b Silicone base NATO-S-1714 70 2c Mineral base NATO-H-520 50 3a Oils Mineral base NATO-O-1176 70 3b NATO-O-142 50 3c Synthetic base Diester ISO 1817 Liquid 101 100 3d Synthetic base Polyol ester NATO-O-160 50 4a 4b Cleaning fluids Solvent Isopropanol or Ethanol 23 4c Propanol 25 % White spiri

40、t 75 % 23 4d Methylethylketone 23 4e Detergent MIL-PRF-87937 Type 1V 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 23 6 Fire extinguishant Not Tested Se

41、e 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 4708-104:2016 (E) 9 6 Designation The sleeving shall be designated as shown in the following example: Description EN publication number EN Part numb

42、er Size (expanded/ recovered internal diameter, in millimetres) Colour Sleeving EN 4708 104 12,7/6,4 TT a a TT designates transparent sleeving. 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.