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1、BRITISH STANDARD AEROSPACE SERIES BS G 198-5:1997 Incorporating Amendment No. 1 Sleeves and moulded components for aircraft electric cables and equipment wires Part 5: Specification for heat shrinkable moulded shapes ICS 49.060 Licensed Copy: London South Bank University, London South Bank Universit
2、y, Sat Dec 09 02:53:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS G 198-5:1997 This British Standard, having been prepared under the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 August 1997 BSI 16 November 2005 The
3、 following BSI references relate to the work on this standard: Committee reference ACE/6 Draft for comment 94/705034 DC ISBN 0 580 26858 6 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee ACE/6, Aerospace avionic, electric
4、al and fibre optic technology, upon which the following bodies were represented: British Airways British Cable Makers Confederation British Rubber Manufacturers Association Civil Aviation Authority (Airworthiness Division) Federation of the Electronics Industry Ministry of Defence Society of British
5、 Aerospace Companies Amendments issued since publication Amd. No.DateComments 1596116 November 2005Changes to Clause 7, Table 7, Table 8 and Figure 2 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:53:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS G 198-5:1
6、997 BSI 16 November 2005i Contents Page Committees responsibleInside front cover Forewordiii 1Scope1 2References1 3Information to be supplied by the purchaser1 4Materials and characteristics2 5Colour2 6Finish2 7Dimensions2 8Shelf life2 9Type testing3 10Production routine and quality testing4 11Tests
7、 and requirements6 12Marking and packaging17 Annex A (informative) Storage recommendations41 Annex B (normative) Method for the determination of smoke index41 Annex C (normative) Method for the determination of combustion products index46 Annex D (normative) Compatibility test49 Annex E (informative
8、) Compatibility guide52 Annex F (informative) Guide to installation53 Figure 1 Style A (lipped straight bottle with short body)19 Figure 2 Style B (lipped straight bottle with medium body)20 Figure 3 Style C (lipped straight bottle with long body)21 Figure 4 Style D (non-lipped straight bottle)22 Fi
9、gure 5 Style E (lipped straight bottle with long tail)23 Figure 6 Style F (lipped right angle boot)24 Figure 7 Style G (non-lipped right angle boot)25 Figure 8 Style H (lipped right angle boot with long tail)26 Figure 9 Style I (lipped right angle boot with longer tail)28 Figure 10 Style J (lipped s
10、traight bottle with longer tail)29 Figure 11 Style K (non-lipped straight long tail boot)30 Figure 12 Style L transitions (“T” junction)31 Figure 13 Style M transitions (30/45 junction)32 Figure 14 Style N transitions (“Y” junction 45 low profile)33 Figure 15 Style O (straight, high ratio lipped boo
11、t)34 Figure 16 Style P transitions (“Y” junction)35 Figure 17 Style R transitions (three branched outlets)36 Figure 18 Style S transitions (four branched outlets)37 Figure 19 Style T D sub-miniature boot straight)38 Figure 20 Style U D sub-miniature boot right angle) (longitudinal)39 Figure 21 Style
12、 V D sub-miniature boot right angle (across width)40 Figure B.1 Schematic details of burner for smoke index test43 Figure B.2 Schematic front view of smoke index test piece holder44 Figure D.1 Schematic arrangement for peel testing51 Figure F.1 Sequence of operations for installation of a heat-shrin
13、kable straight boot55 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:53:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS G 198-5:1997 ii BSI 16 November 2005 Page Figure F.2 Sequence of operations for installation of a heat-shrinkable right angled boot56 Tab
14、le 1 Types of heat-shrinkable moulded shape materials2 Table 2 Materials and characteristics3 Table 3 Type tests4 Table 4 Production routine tests5 Table 5 Production quality tests5 Table 6 List of test fluids17 Table 7 Dimensions of style A19 Table 8 Dimensions of style B20 Table 9 Dimensions of st
15、yle C21 Table 10 Dimensions of style D22 Table 11 Dimensions of style E23 Table 12 Dimensions of style F24 Table 13 Dimensions of style G25 Table 14 Dimensions of style H27 Table 15 Dimensions of style I28 Table 16 Dimensions of style J29 Table 17 Dimensions of style K30 Table 18 Dimensions of style
16、 L31 Table 19 Dimensions of style M32 Table 20 Dimensions of style N33 Table 21 Dimensions of style O34 Table 22 Dimensions of style P35 Table 23 Dimensions of style R36 Table 24 Dimensions of style S37 Table 25 Dimensions of style T38 Table 26 Dimensions of style U39 Table 27 Dimensions of style V4
17、0 Table E.1 Bonding adhesives52 Table E.2 Guide to adhesive compatibility52 List of references58 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:53:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS G 198-5:1997 BSI 16 November 2005iii Foreword This Part of BS
18、G 198 has been prepared by Technical Committee ACE/6 and specifies requirements for heat-shrinkable moulded shape materials for aircraft electric cables and insulated equipment wires. BS G 198 is published in the following Parts. Part 1: Specification for elastomeric sleeves for binding and identifi
19、cation; Part 2: Specification for slip-on sleeves for identification purposes; Part 3: Specification for heat-shrinkable sleeving for binding, insulation and identification; Part 4: Specification for heat-shrinkable sleeving for binding and insulation; Part 5: Specification for heat-shrinkable mould
20、ed shapes. It is envisaged that there will be a further Part on heat-shrinkable dual wall sleeves. This Part of BS G 198 specifies requirements for heat-shrinkable moulded shapes in a range of configurations and materials suitable for insulation, environmental sealing, mechanical protection and stra
21、in relief for connector/cable terminations and multi-way transitions. These shapes are normally available in black, but other colours may be available. Moulded shapes should be installed in accordance with manufacturers or suppliers instructions and, in particular, it should be noted that when shrin
22、kage is restricted some properties may be impaired, e.g. wall thickness will be reduced; and moulded shape performance may also be reduced. A guide to installation is detailed in Annex F. Heat-shrinkable moulded shapes are normally used with a bonding adhesive as detailed in Annex E Table E.1. Some
23、of these adhesives may be supplied pre-coated or as a separate component. Annex E also details the recommended combinations of adhesive types, moulded shapes and sleevings. The requirements for adhesive compatibility are detailed in Annex D. It should be noted that the majority of heat guns availabl
24、e for the application of moulded shapes are not suitable for use in potentially explosive atmospheres. Application tools suitable for the installation of heat-shrinkable moulded shapes in those areas should be designed for zone 2 areas as specified in BS 5345-2:1983. WARNING NOTE 1. This standard re
25、quires the use of substances and/or test procedures that may be injurious to health if adequate precautions are not taken. It refers only to technical suitability and in no way absolves either the supplier or the user from statutory obligations relating to health and safety at any stage of manufactu
26、re or use. WARNING NOTE 2. It should be clearly understood that the combustion characteristics tests detailed in this standard, i.e. flammability, oxygen index, flammability temperature, smoke index and combustion products index are in no way suitable for assessing a total fire hazard situation. The
27、y are solely for the purpose of specifying the basic material quality requirements of the heat-shrinkable shapes. WARNING NOTE 3. The use of heat-shrinkable materials entails the risk from heat, solvents and gases. Every precaution is to be exercised against the harmful effects by the use of protect
28、ive gloves and good ventilation etc. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:53:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS G 198-5:1997 iv BSI 16 November 2005 This publication does not purport to include all the necessary provisions of a contra
29、ct. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i to iv, pages 1 to 59 and a back cover. This standard has been up
30、dated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:53:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS G 198-5:1997 BSI
31、16 November 20051 1 Scope This Part of BS G 198 specifies the design, material performance requirements, quality assurance requirements and test procedures for the types of heat-shrinkable moulded shapes shown in Table 1. In addition to the definitive requirements, this standard also requires the it
32、ems detailed in clause 3 to be documented. For compliance with this standard, both the definitive requirements and the documented items have to be satisfied. NOTE 1 Guidance for the storage of finished moulded shapes is given in Annex A. NOTE 2 The latest revision of an aerospace series standard is
33、indicated by a prefix number. NOTE 3 Moulded shapes that have been shrunk are referred to as recovered. When specified, moulded shapes used with bonding adhesives shall conform to the compatibility test requirements detailed in Annex D. 2 References 2.1 Normative references This British Standard inc
34、orporates, by reference, provisions from specific editions of other publications. These normative references are cited at the appropriate points in the text and the publications are listed on page 58. Subsequent amendments to, or revisions of, any of these publications apply to this British Standard
35、 only when incorporated in it by updating or revision. 2.2 Informative references This British Standard refers to other publications that provide information or guidance. Editions of these publications current at the time of issue of this standard are listed on the inside back cover, but reference s
36、hould be made to the latest editions. 3 Information to be supplied by the purchaser The following information to be supplied by the purchaser shall be fully documented. Both the definitive requirements specified throughout the standard and the following documented items shall be satisfied before a c
37、laim of compliance with the standard can be made and verified: a) the number of this British Standard (i.e. BS G 198-5:1996); b) the total quantity required; c) the colour, if other than black; d) the potting ports, if required (see clause 12); e) the codified identification (see clause 12); f) the
38、packaging requirements; g) compatibility, if required (see Annex D); h) whether the material is to be tested in any further fluids in addition to those given in Table 6 (see 11.13). The description and dimensions of non-standard shapes shall be agreed between the purchaser and the manufacturer or su
39、pplier. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:53:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS G 198-5:1997 2 BSI 16 November 2005 Table 1 Types of heat-shrinkable moulded shape materials 4 Materials and characteristics Shapes shall be made from
40、materials which meet the appropriate requirements of clause 11. NOTE Materials known to meet the requirements of the tests specified in clause 11 will have the characteristics shown in Table 2. 5 Colour The colour shall be uniform and evenly dispersed, and recognizable as one of those given in BS 67
41、46C:1993. 6 Finish The moulded shapes, both before and after unrestricted shrinkage, shall be free from bubbles, pinholes, and other defects that may affect performance. 7 Dimensions The dimensions for standard moulded shapes, both before and after unrestricted shrinkage shall be as specified in the
42、 appropriate table of Table 7 to Table 27. NOTE 1 Unless otherwise indicated, the dimensions in Table 7 to Table 27 are in millimetres. NOTE 2 Non-standard moulded shapes are available in dimensions other than those specified in Table 7 to Table 27. 8 Shelf life The “use-by” date shall indicate the
43、end of the guaranteed storage time for which clause 7 still applies when stored under the conditions as specified in Annex A. NOTE The “use-by” date is the shelf life. Type code Guide to temperature range C Exposure temperature C Recommended min. shrink temperature C (4) Guide to stiffness Other mai
44、n properties (1)(2)(3) DA 55 to + 135 135175225135Semi rigidFlame retardant DB 55 to + 135 135175225125FlexibleFlame retardant, low shrink temperature DC 75 to + 130 130175250135Very flexibleFlame resistant DD 55 to + 200 200250300175FlexibleFlame retardant, oil and fuel resistant DE 75 to + 120 120
45、160215150Semi rigidFlame retardant, oil resistant DF 30 to + 105 105150175135Semi rigidLimited fire hazard Temperature (1) is for a minimum of 20 000 h when assessed in accordance with 11.16. Temperature (2) is for a minimum of 168 h when assessed in accordance with 11.10. Temperature (3) is for a m
46、inimum of 4 h when assessed in accordance with 11.14. The minimum shrink temperature (4) is the minimum temperature at which full recovery can be guaranteed. Refer to the manufacturer/supplier for actual value. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:
47、53:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS G 198-5:1997 BSI 16 November 20053 Table 2 Materials and characteristics 9 Type testing 9.1 Type tests 9.1.1 The manufacturer or supplier shall provide details of the following: a) material composition; b) agreed techniques; and c) evidence to the
48、satisfaction of the approving authority1) that the material used to manufacture the moulded shapes conforms to the appropriate type tests listed in Table 3, details of which are given in clause 11. All test results shall be recorded and retained for the duration of the approval. The dimensions of th
49、e moulded shapes shall be as specified in Table 7 to Table 27. 9.1.2 Unless otherwise specified type tests shall be performed using test sheets as specified in clause 10.4. In the event of a failure of the moulding material to conform to the requirements of any test, the batch of material shall be re-sampled and the test repeated using two further sets of test pieces. Both sets shall conform to the appropriate test requir