ASD-STAN PREN 4708-001-2012 Aerospace series Sleeving heat-shrinkable for binding insulation and identification Part 001 Technical specification (Edition P 1).pdf

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1、ASD-STAN STANDARD NORME ASD-STAN ASD-STAN NORM prEN 4708-001 Edition P 1 December 2012 PUBLISHED BY THE AEROSPACE AND DEFENCE INDUSTRIES ASSOCIATION OF EUROPE - STANDARDIZATIONAvenue de Tervuren, 270 - B-1150 Brussels - Tel. 32 2 775 8126 - Fax. 32 2 775 8131 - www.asd-stan.orgICS: Descriptors: ENGL

2、ISH VERSION Aerospace series Sleeving, heat-shrinkable, for binding, insulation and identification Part 001: Technical specification Srie arospatiale Manchons thermortractables, de jonction, isolement et identification Partie 001 : Spcification technique Luft- und Raumfahrt Wrmeschrumpfender Schlauc

3、h zur Befestigung, Isolierung und Identifizierung Teil 001: Technische Lieferbedingungen This “Aerospace 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 Eur

4、opean 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 to an extent that interchangeability is affected, physically or functionally, wit

5、hout re-identification of the standard. After examination and review by users and formal agreement of ASD-STAN, it 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

6、 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. Edition approved for publication 1 December 2012 Comments should be sent within six months after the date of publication to A

7、SD-STAN Electrical Domain Copyright 2012 by ASD-STAN prEN 4708-001:2012 (E) 2 Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 Definitions and symbols .3 4 Materials and characteristics .3 5 Required properties .4 6 Test methods 4 7 Printed sleeves .7 8 Quality assurance 7 9 Labelling a

8、nd packaging .8 Annex A (informative) Storage recommendations .9 Foreword This standard was reviewed by the Domain Technical Coordinator of ASD-STANs Electrical Domain. After inquiries and votes carried out in accordance with the rules of ASD-STAN defined in ASD-STANs General Process Manual, this st

9、andard has received approval for Publication. prEN 4708-001:2012 (E) 3 1 Scope This standard specifies the required characteristics, test methods, qualification and production routine testing of heat shrinkable sleeving for binding, insulation and identification. 2 Normative references The following

10、 referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 3475-100, Aerospace series Cables, electrical, aircraft use

11、 Test methods Part 100: General EN 9133, Aerospace series Quality management systems Qualification procedure for aerospace standard parts EN ISO 846, Plastics Evaluation of the action of microorganisms (ISO 846:1997) EN ISO 4892-2, Plastics Methods of exposure to laboratory light sources Part 2: Xen

12、on-arc lamps IEC 60304, Standard colours for insulation for low-frequency cables and wires 1)IEC 60684-2, Flexible insulating sleeving Part 2: Methods of test 1)3 Definitions and symbols For the purposes of this document, the definitions and symbols given in EN 3475-100 apply. 4 Materials and charac

13、teristics 4.1 General Sleeving shall be made from materials that ensure the finished sleevings conform to the product standard. 4.2 Material types See product standards. 4.3 Finish The sleeving, both before and after unrestricted shrinkage, shall be free from bubbles, pinholes, creases and other def

14、ects that may affect performance. 4.4 Dimensions See product standard. 1) Published by: IEC International Electrotechnical Commission http:/www.iec.ch/. prEN 4708-001:2012 (E) 4 4.5 Shrink ratio See product standard. 4.6 Temperature range See product standard. 4.7 Shelf life NOTE The use by date is

15、the shelf life when stored under the conditions 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 confor

16、m to the internal diameter, wall thickness and longitudinal change requirements as specified in the product standard. 4.8 Colours See product standards for available colours. The colours shall be a reasonable match to one of those specified in IEC 60304. 4.9 Standard cutting tolerances for cut lengt

17、hs 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 Required properties The properties of th

18、e sleeves, tested according to the methods described hereafter shall comply with the values given in the product standards. 6 Test methods See Table 2. prEN 4708-001:2012 (E) 5 Table 2 Tests: methods, frequency, requirements (1 of 2) Description Test method IEC 60684-2 Clause Qualification8.1 Routin

19、e 8.2 Periodic 8.3 Requirements Test conditions 2 X X X Measurements of bore, wall thickness and concentricity 3 X X X Product standard Density a4 X X X Product standard Heat shock (resistance to heat) 6 X X X Product standard Longitudinal change 9 X X X Product standard Bending after heating 13 X X

20、 Product standard Bending at low temperature 14 X X Product standard Dimensional 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 st

21、andard Volume resistivity 23 X X Product standard Flame propagation tests a26 X X Product standard Oxygen index a27 X X Product standard Transparency b28 X X Product standard Corrosion resistance (tensile and elongation) 32 X X Product standard Copper corrosion (presence of corrosive volatiles) a33

22、X X Product standard Colour fastness to lightac34 X X Product standard Resistance to selected fluids a36 X X Product standard Thermal endurance a37 X Product standard Mass per unit length 38 X X Product standard Heat ageing 39 X X Product standard Water absorption a40 X X Product standard prEN 4708-

23、001:2012 (E) 6 Table 2 Tests: methods, frequency, requirements (2 of 2) Description Test method IEC 60684-2 Clause Qualification8.1 Routine8.2 Periodic 8.3 Requirements Restricted shrinkage 41 X X Product standard Colour stability to heat ac42 X X Product standard Smoke index a43 X X Product standar

24、d Toxicity index a44 X X Product standard Halogen content a45 X X Product standard Acid gas generation a46 X X Product standard Long term ageing (3 000 h) a50 X Product standard Dynamic shear at ambient temperature 51 X X Product standard Dynamic shear at elevated temperature 52 X X Product standard

25、 Dynamic shear after heat shock and heat ageing 53 X X Product standard Rolling drum peel to aluminium 54 X X Product standard Aluminium rod dynamic shear 55 X X Product standard Sealing 56Product standard Adhesive T peel strength of two bonded heat shrinkable substrates 57 X X Product standard Fung

26、us resistanceaIn accordance with EN ISO 846 method B, 56 days exposure, followed by the measurement of tensile strength and elongation at break X Product standard Artificial weathering aIn accordance with EN ISO 4892-2 Table 3 method A cycle 1 relative humidity (565 10) % duration 720 h X Product st

27、andard X Test applicable. aOnly one size of sleeving needs to be tested. bTest the greatest wall thickness. cAll colours are to be tested. prEN 4708-001:2012 (E) 7 7 Printed sleeves See product standards. 8 Quality assurance 8.1 Qualification 8.1.1 General requirements See EN 9133. 8.1.2 Qualificati

28、on 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 Qualification tests Qualification tests shall be performed on sizes taken fro

29、m the top, middle and bottom of the manufacturer or supppliers range for each different material, unless otherwise indicated in Table 2. 8.2 Production routine tests 8.2.1 Delivery conditions The production routine tests shall be applied to samples, taken at random, from every batch, and shall consi

30、st of the tests listed in Table 2. 8.2.2 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 maintained constant throughout. For continuous processing a single mix shall

31、 be defined by the manufacturer or supplier to the satisfaction of the approving authority. 8.2.3 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

32、 sets shall conform to the appropriate test requirements, otherwise the sleeving shall be deemed not to conform to this standard. 8.3 Periodic tests They shall be carried out by sampling at least every five years. The “X” means applicable at the same condition specified for qualification. See Table

33、2. prEN 4708-001:2012 (E) 8 9 Labelling and packaging 9.1 Labelling Each package of sleeves/sleeving shall be labelled with the following information. manufacturers name and designation; sleeving designation according to the EN product standard; batch number; date of manufacture (month, year); the u

34、se by date (If shorter than five years) the length and quantity of sleeves/sleeving. the characters/legend printed on the sleeves, if applicable. 9.2 Packaging Sleeving shall be supplied in a way which ensures adequate protection during transport, handling and storage. Sleeving shall be wound evenly

35、 and compactly on reels or in coils suitably secured unless an alternative form of packaging such as containers or dispensers is required by the contract. If a unit pack contains more than one length of sleeving, the purchaser may require this to be indicated. The following items are subject to agre

36、ement between purchaser and supplier. number of lengths; minimum lengths; marking requirements. prEN 4708-001:2012 (E) 9 Annex A (informative) Storage recommendations The following recommendations are intended to assist the prevention of sleeving degradation caused by conditions existing in the stor

37、age area. a) Sleeving should be stored between 18 C and 35 C. b) Sleeving should be stored under dry conditions. c) No sleeving should be stored in direct sunlight or strong artificial light. d) Sleeving should not be stored within 2 m of a direct ultraviolet (e.g. fluorescent) light source. e) Sleeving delivered in packages should remain packaged until required. f) Material used in packaging should preferable be of an opaque material. g) Packages which are opened for removal of part of their contents should be adequately resealed.