ASD-STAN PREN 4708-001-2017 Aerospace series Sleeving heat-shrinkable for binding insulation and identification Part 001 Technical specification (Edition P 2).pdf

1、ASD-STAN STANDARD NORME ASD-STAN ASD-STAN NORM ASD-STAN prEN 4708-001 Edition P 2 April 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 Supersedes e

2、dition P 1 of December 2012 and will supersede EN 4708-001:2014 Descriptors: ENGLISH VERSION Aerospace series Sleeving, heat-shrinkable, for binding, insulation and identification Part 001: Technical specification Luft- und Raumfahrt Wrmeschrumpfender Schlauch zur Befestigung, Isolierung und Identif

3、izierung Teil 001: Technische Lieferbedingungen Srie arospatiale Manchons thermortractables, de jonction, isolement et identification Partie 001 : Spcification technique This “Aerospace Series“ Prestandard has been drawn up under the responsibility of ASD-STAN (The AeroSpace and Defence Industries A

4、ssociation 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 this Prestandard, the technical content shall not be changed

5、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 draft European Standard (prEN) to CEN (European Committee for Stan

6、dardization) 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 standards conflicting with the EN. ASD-STAN Technical Committee

7、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 infringement arising therefrom, is the sole responsibility of th

8、e 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 arise. All rights reserved. No parts of this publication may be

9、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 Web address: http:/www.asd-stan.org/ Edition approved for public

10、ation 1st April 2017 Comments should be sent within six months after the date of publication to ASD-STAN Electrical Domain Copyright 2017 ASD-STAN prEN 4708-001:2017 (E) 2 Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 Terms and definitions . 3 4 Materials and characteristics . 3 5 Re

11、quired properties 4 6 Test methods 5 7 Printed sleeves . 8 8 Quality assurance 8 9 Labelling and packaging . 9 Annex A (informative) Storage recommendations 10 Foreword This standard was reviewed by the Domain Technical Coordinator of ASD-STANs Electrical Domain. After inquiries and votes carried ou

12、t in accordance with the rules of ASD-STAN defined in ASD-STANs General Process Manual, this standard has received approval for Publication. prEN 4708-001:2017 (E) 3 1 Scope This standard specifies the required characteristics, test methods, qualification and production routine testing of Heat shrin

13、kable sleeving for binding, insulation and identification. 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 undated references, the lat

14、est edition of the referenced document (including any amendments) applies. EN 3475-100, Aerospace series Cables, electrical, aircraft use Test methods Part 100: General EN 6059-403, Aerospace series Electrical cables, installation Protection sleeves Test methods Part 403: Scrape abrasion EN 9133, Ae

15、rospace series Quality management systems Qualification procedure for aerospace standard parts EN ISO 846, Plastics Evaluation of the action of microorganisms (ISO 846) EN ISO 4892-2, Aerospace series Methods of exposure to laboratory light sources Part 2: Xenon-arc lamps (ISO 4892-2) IEC 60304, Sta

16、ndard colours for insulation for low-frequency cables and wires 1) IEC 60684-2, Flexible insulating sleeving Part 2: Methods of test 1) 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 3475-100 apply. 4 Materials and characteristics Sleeving shall be m

17、ade from materials that ensure the finished sleevings conform to the product standard. 4.1 Material types See product standards. 4.2 Finish The sleeving, both before and after unrestricted shrinkage, shall be free from bubbles, pinholes, creases and other defects that may affect performance. 4.3 Dim

18、ensions See product standard. 1) Published by: IEC International Electrotechnical Commission. http:/www.iec.ch/ prEN 4708-001:2017 (E) 4 4.4 Shrink ratio See product standard. 4.5 Temperature range See product standard. 4.6 Shelf life The use by date is the shelf life when stored under the condition

19、s recommended in Annex A. The use by date shall be the guaranteed minimum storage time for which the sleeving retains the “as supplied” internal diameter. Following unrestricted shrinkage in accordance with the product standard, the sleeving shall conform to the internal diameter and wall thickness

20、requirements as specified in the product standard. In the event that the shelf life specimens fail the requirements of the product standard, delivery of any product still held by the manufacturer or distributors shall be halted until samples of each batch in storage are tested to confirm that they s

21、atisfy the original recovery qualification requirements, after which release can be resumed. In the event of failure the Approval Authority is to be notified. 4.7 Colours See product standards for available colours. The colours shall be a reasonable match to one of those specified in IEC 60304. 4.8

22、Standard cutting tolerances for cut lengths of sleeving See Table 1. Table 1 Standard cutting tolerances for cut lengths of sleeving Cut length mm Standard cutting tolerances 0 to 9,9 0,5 10 to 24,9 1,0 25 to 49,9 1,5 50 to 100 3,0 101 to 150 4,0 151 to 250 5,0 251 to 1 200 12,0 1 201 and over 1 % 5

23、 Required properties The properties of the sleevings, tested according to the methods described hereafter shall comply with the values given in the product standards. prEN 4708-001:2017 (E) 5 6 Test methods For each product standard, tests shall be as given in Table 2. 6.1 Shelf life tests Sufficien

24、t quantities of each of the sleeves used for qualification shall be retained to provide the test samples for the conducting of the shelf life test for 60 months. Shorter if specified in the product standard Tests shall be conducted at 12 monthly intervals. The sleeves shall be stored at a temperatur

25、e of (23 3) C and a relative humidity between 45 % and 75 %. Measure the as supplied internal diameter and then fully recover the sleeves in accordance with the product standard. Measure the recovered internal diameter and wall thickness .The measurements shall be made in accordance with IEC 60684-2

26、, Clause 3. 6.2 Scrape abrasion 6.2.1 Apparatus Shall be in accordance with EN 6059-403 except that the test mandrels shall be a smooth metal mandrel. 6.2.2 Preparation of specimens Two (2) sleeves 200 mm in length shall be recovered onto test mandrels of diameter as follows: Specimen A: 10 % greate

27、r than the minimum internal diameter of the fully recovered sleeving as specified in the product standard. Specimen B: 10 % smaller than the maximum internal diameter of the as supplied sleeving as specified in the product standard. 6.2.3 Method The test shall be conducted at ambient temperature wit

28、h the size and load as specified in the product standard. The test shall be conducted without the electrical contact between the needle and the test mandrel. Each cycle shall consist of the forward and backward movement of needle. The action should continue until the needle rubs through the sleeve m

29、axing contact with the mandrel or the number of cycles exceeds 10 times the required average number of cycles specified in the product standard. The number of cycles shall be recorded. Four (4) tests shall be carried out on each specimen whereby for each test the specimen is moved forward approximat

30、ely 30 mm and rotated through 90 degrees. Calculate the arithmetic mean of the eight (8) measurements from the two (2) specimens. Recalculate the arithmetic mean by ignoring all the values greater than the original mean. This shall be recorded as the result. 6.2.4 Requirement A specimens shall withs

31、tand 1 000 cycles and B specimens shall withstand 250 cycles. prEN 4708-001:2017 (E) 6 Table 2 Tests: methods, frequency, requirements Description Test method IEC 60684-2 Clause Qualification 8.1 Periodic 8.3 Routine Requirements Compound Sleeving Test conditions 2 X X X X Measurements of bore, wall

32、 thickness and concentricity 3 X X X X Product standard Density a 4 X X X Product standard Heat shock (resistance to heat) 6 X X X Product standard Longitudinal change 9 X X X X Product standard Bending after heating 13 X X Product standard Bending at low temperature 14 X X Product standard Dimensio

33、nal stability on storage 16 X X Product standard Tensile strength, tensile stress at 100 % elongation, elongation at break and secant modulus at 2 % elongation 19 X X X Product standard Breakdown voltage 21 X X X Product standard Volume resistivity 23 X X Product standard Flame propagation tests a 2

34、6 X X Product standard Oxygen index a 27 X X Product standard Transparency b 28 X X Product standard Corrosion resistance (tensile and elongation) 32 X X Product standard Copper corrosion (presence of corrosive volatiles) a 33 X X Product standard Colour fastness to light a c 34 X X Product standard

35、 Resistance to selected fluids a 36 X X Product standard Thermal endurance a 37 X Product standard Mass per unit length 38 X X X Product standard Heat ageing 39 X X Product standard Water absorption a 40 X X Product standard Restricted shrinkage 41 X X Product standard Colour stability to heat c 42

36、X X Product standard Smoke index a 43 X X Product standard Toxicity index a 44 X X Product standard Halogen content a 45 X X Product standard prEN 4708-001:2017 (E) 7 Table 2 Tests: methods, frequency, requirements Description Test method IEC 60684-2 Clause Qualification 8.1 Periodic 8.3 Routine Req

37、uirements Compound Sleeving Acid gas generation a 46 X X Product standard Long term ageing (3 000 h) a 50 X Product standard Dynamic shear at ambient temperature 51 X X Product standard Dynamic shear at elevated temperature 52 X X Product standard Dynamic shear after heat shock and heat ageing 53 X

38、X Product standard Rolling drum peel to aluminium 54 X X Product standard Aluminium rod dynamic shear 55 X X Product standard Sealing 56 X X Product standard Adhesive T peel strength of two bonded heat-shrinkable substrates 57 X X Product standard Fungus resistance a In accordance with EN ISO 846 me

39、thod B, 56 days exposure, followed by the measurement of tensile strength and elongation at break X Product standard Artificial weathering a In accordance with EN ISO 4892-2 Table 3. Method A. Cycle 1. Relative humidity (65 10) %. Duration 720 hours X Product standard Shelf life EN 4708-001 subclaus

40、e 6.1 X d Product standard X Test applicable when specified in the product standard. a Only one size of sleeving needs to be tested. b Test the greatest wall thickness. c All colours are to be tested. d See 8.1.3. prEN 4708-001:2017 (E) 8 7 Printed sleeves See product standards. 8 Quality assurance

41、8.1 Qualification 8.1.1 General requirements See EN 9133. 8.1.2 Qualification conditions The sleevings shall be submitted for qualification tests on spools, in coils or sufficient cut lengths. Each spool, coil or sufficient cut lengths shall have a label containing information given in 9.1. 8.1.3 Qu

42、alification tests See Table 2. Qualification tests shall be performed on sizes taken from the top, middle and bottom of the manufacturer or suppliers range for each different material, unless otherwise indicated in Table 2. Select samples for the shelf life tests. Due to the duration of this test ap

43、proval may be granted prior to completion. Approval shall be granted subject to the provisions of subclause 4.6 and will be subject to review on completion. 8.2 Maintenance of qualification 8.2.1 Periodic tests See Table 2, tests shall be successfully carried out every 60 months for products in prod

44、uction or when production is restarted following a production stoppage of greater than 36 months. The maintenance qualification tests shall be performed on specimens taken at random in accordance with EN 9133. 8.3 Routine tests 8.3.1 Delivery conditions See Table 2. The production routine tests shal

45、l be applied to samples, taken at random, from every batch, either compound or sleeving, and shall consist of the tests listed in Table 2. The tests for compound batches shall be applied to the first sleeving produced from each compound batch. Samples of sleeving or compound shall be selected from e

46、ach batch and subjected to the tests detailed in Table 2 before release. prEN 4708-001:2017 (E) 9 8.3.2 Sleeving batch A batch of sleeving shall consist of sleeving of the same type, dimensions and colour produced from a single mix at any one time, provided that the cross-linking conditions are main

47、tained constant throughout. For continuous processing a single mix shall be defined by the manufacturer or supplier to the satisfaction of the approving authority. 8.3.3 Compound batch A batch of compound shall consist of that quantity of compound material mixed, and/or homogeneously blended at any

48、one time. For continuous processing a single mix shall be defined by the manufacturer or supplier to the satisfaction of the mandated body. 8.3.4 Random sampling retest In the event of a failure of the sleeving to conform to the requirements of a test, the batch shall be re-sampled and the test repeated using two further sets of test-pieces. Both sets shall conform to the appropriate test requirements, otherwise the sleeving shall be deemed not to conform to this standard. 9 Labelling and packaging 9.1 Labelling Each package of sleeves/sleeving shall be labelled with the following infor