1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD AEROSPACE SERIES BS 4G 19
2、8 : Part 1 : 1997 ICS 49.060 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Sleeves and moulded components for aircraft electric cables and equipment wires Part 1. Specification for elastomeric sleeves for binding and identificationBS 4G 198 : Part 1 : 1997 This British Stand
3、ard, 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 First published 1969 Second edition June 1982 Third edition October 1989 Fourth edition 1997 BSI 1997 The following BSI refe
4、rences relate to the work on this standard: Committee reference ACE/6 Draft for comment 95/700916 DC ISBN 0 580 26401 7 Amendments issued since publication Amd. No. Date Text affected Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical
5、 Committee ACE/6, Aerospace avionic, electrical 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 In
6、dustry Ministry of Defence Society of British Aerospace CompaniesBS 4G 198 : Part 1 : 1997 BSI 1997 i Contents Page Committees responsible Inside front cover Foreword ii Specification 1 Scope 1 2 References 1 3 Information and requirements to be agreed and documented 1 4 Materials and characteristic
7、s 3 5 Colour 4 6 Finish 4 7 Dimensions 4 8 Printing 4 9 Shelf life 7 10 Type testing 7 11 Production routine and production quality testing 8 12 Tests and requirements 9 13 Marking and packaging 23 Annex A (informative) Storage recommendations 24 Figures 1 Disposition of characters on identification
8、 sleeves 7 2 Test configuration for the flammability test 21 3 Standard propane burner for flammability test 22 Tables 1 Types of elastomeric sleeve materials 1 2 Standard cutting tolerances for cut lengths of sleeves 2 3 Materials and characteristics 2 4 List of test fluids 3 5 Type tests 4 6 Stand
9、ard colours availability and their allocated numbers 4 7 Dimensions of type 1 sleeves 5 8 Dimensions of type 2 sleeves 6 9 Dimensions of type 3 and 4 sleeves 6 10 Size and repetition of characters for single identification sleeves 7 11 Production routine tests 8 12 Production quality tests 9 13 Test
10、s and requirements 9 List of references 26ii BSI 1997 BS 4G 198 : Part 1 : 1997 1) In preparation. Foreword This Part of BS G 198 has been prepared by Technical Committee ACE/6. It specifies requirements for elastomeric sleeves for aircraft electric cables and insulated equipment wires. BS G 198 is
11、published in the following separate Parts. Part 1 Specification for elastomeric sleeves for binding and identification Part 2 Specification for slip-on sleeves for identification purposes Part 3 Specification for heat-shrinkable sleeving for binding, insulation and identification Part 4 Specificatio
12、n for fluoropolymer heat-shrinkable sleeving for binding and insulation Part 5 Specification for heat-shrinkable moulded shapes 1) NOTE. It is envisaged that there will be a further Part on heat-shrinkable dual wall sleeves. This Part of BS G 198 supersedes BS 3G 198 : Part 1 : 1989 which is withdra
13、wn. This Part of BS G 198 specifies requirements for elastomeric sleeves, in a range of diameters, lengths and materials, for binding and identification purposes on electric cables, and insulated equipment wires in aircraft. Sleeves are available in a range of colours. The various types of sleeves s
14、pecified by this British Standard have been designated by the allocation of type numbers. These numbers have been adopted by the aircraft industry over a period of years and do not necessarily run consecutively through the different Parts of BS G 198. Sleeves should be installed in accordance with t
15、he manufacturers or the suppliers instructions. It should be noted that the sleeves are to be used under mechanical strain not exceeding 50 % diameter expansion. WARNING NOTE 1. This standard calls for the use of substances and/or test procedures that may be injurious to health if adequate precautio
16、ns 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 manufacture or use. WARNING NOTE 2. It should be clearly understood that the flammability tests specified in this
17、standard are not for assessing a total fire hazard situation. It is solely for the purpose of specifying the basic material quality requirements of the elastomeric sleeves. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document co
18、mprises a front cover, an inside front cover, pages i and ii, pages 1 to 26, an inside back cover and a back cover. BSI 1997 1 BS 4G 198 : Part 1 : 1997 Table 1. Types of elastomeric sleeve materials Type Guide to temp range Exposure temperature Material Other main properties C C 1) (1) (2) (3) 1 2
19、40 to + 70 70 95 115 Polychloroprene Flame retardant 2 2 25 to + 75 75 100 120 PVC-Nitrile Oil resistant 3 2 65 to + 140 140 170 190 Fluorinated Silicone Flame retardant and oil resistant 4 2 65 to + 160 160 220 260 Silicone Heat resistant 1) Low temperature flexibility is assessed in accordance wit
20、h clause 12.14. NOTE 1. Exposure (1) is for a minimum of 20,000 h when assessed in accordance with clause 12.16. NOTE 2. Exposure (2) is for a minimum of 1000 h when assessed by clause 12.17. NOTE 3. Exposure (3) is for a minimum of 168 h when assessed by clause 12.17. Specification 1 Scope This Par
21、t of BS G 198 specifies the design, performance, quality assurance and methods of test for the types of elastomeric sleeves shown in table 1. These sleeves are for binding and identification purposes. Routine and quality tests are specified. In addition to the definitive requirements, this standard
22、also requires the items 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. Recommendations for the storage of finished sleeves is given in annex A. NOTE 2. The latest revision of an Aerospa
23、ce Series standard is indicated by a prefix number. Whilst not primarily intended for insulation purposes, this standard includes electrical tests to determine insulating properties. 2 References 2.1 Normative references This Part of BS 4G 198 incorporates, by dated or undated reference, provisions
24、from other publications. These normative references are made at the appropriate places in the text and the cited publications are listed on page 26. For dated references, only the edition cited applies, any subsequent amendments to or revisions of the cited publication apply to this Part of BS 4G 19
25、8 only when incorporated in the reference by amendment or revision. For undated references, the latest edition of the cited publication applies, together with any amendments. 2.2 Informative references This Part of BS 4G 198 refers to other publications that provide information or guidance. Editions
26、 of these publications current at the time of issue of this standard are listed on the inside back cover, but reference should be made to the latest editions. 3 Information and requirements to be agreed and documented The following items to be agreed between the contracting parties, which are specif
27、ied in the clauses referred to, or shall be fully documented. Both the definitive requirements specified throughout the standard and the following documented items shall be satisfied before a claim of compliance with the standard can be made and verified. a) the number of this British Standard (i.e.
28、 BS 4G 198 : Part 1 : 1997); b) the total quantity required; c) cut length, if required (see 7.2) and tolerance on cut length, if the tolerance required is different from that given in table 2; d) the printing requirements (see clause 8 and clause 10); e) the codified identification(see note 1 to 13
29、.1); f) the packaging requirements (see clause 13); g) other environmental requirements (see the note to table 3); h) whether the sleeving is to be tested in any other fluids, in addition to those given in table 4 (see 12.7); i) the test fluid(see table 4); j) the dimensional requirements, if non-st
30、andard (see clause 7).2 BSI 1997 BS 4G 198 : Part 1 : 1997 Table 3. Materials and characteristics Type Material Characteristics 1 Polychloroprene Occasional contamination by mineral oils, petroleum fuels, and mineral or castor oil based hydraulic fluids 2 PVC-Nitrile Occasional contamination by fuel
31、s, lubricants and non-ester based hydraulic fluids 3 Fluorinated Silicone Oil, hydraulic fluid and fuel resistant 4 Silicone Oil and hydraulic fluid resistant. Not for contact with fuels NOTE. If the material is required to withstand certain specific environmental conditions not specified by this st
32、andard, then guidance should be sought from the manufacturer/supplier. Table 2. Standard cutting tolerances for cut lengths of sleeves Cut length Tolerance (mm) (mm) 0 to 9.9 0.5 10 to 24.9 1.0 25 to 49.9 1.5 50 to 99.9 3.0 100 to 149.9 4.0 150 to 249.9 5.0 250 to 1200 12.5 BSI 1997 3 BS 4G 198 : Pa
33、rt 1 : 1997 Table 4. List of test fluids Test fluid reference (See BS 3G 100 : Part 2 : Section 3 : Subsection 3.12 : 1991) Sleeve type 1234 Test temperature Test temperature Test temperature Test temperature (C) (C) (C) (C) (b) Aircraft fuel. Gasoline (piston engine). BS 903 : Part A.16 Test 1 (40
34、1) Test 1 (40 1) Test 1 (40 1) Not suitable (d) Phosphate ester-based (synthetic). BS 903 : Part A.16 Not suitable Not suitable Test 1 (70 1) Test 2 (125 2) (g) Lubricating oil. Ester based (synthetic). BS 903 : Part A.16 Not suitable Test 2 (100 2) Test 1 (150 2) Test 2 (150 2) (c) Hydraulic fluid.
35、 Mineral-based to NATO H-520 (OM-18) 2) Test 2 (95 1) Test 2 (100 2) Test 1 (80 1) Test 2 (150 2) (h) De-icing fluid; Propan-2-ol (isopropyl alcohol) to BS 1595 : Part 1 : 1986 Test 1 (50 1) Test 1 (50 1) Test 1 (50 1) Test 2 (50 1) (m) De-icing fluid; inhibited ethylene glycol 50 % solution in wate
36、r (V/V). BS 6580 Test 1 (50 1) Test 1 (50 1) Test 1 (50 1) Test 1 (50 1) Cleaning fluid 1) Test 2 (50 1) Test 2 (50 1) Test 2 (50 1) Not suitable (r) Sullage fluid; (4 0.1 %) formaldehyde plus (1 0.1 %) o-cresol (GPR) in water. Test 1 (20 5) Test 1 (20 5) Test 1 (20 5) Test 1 (20 5) (e) Silicone bas
37、ed synthetic hydraulic fluid; dimethyl silicone 10 mm 2 /s (cst) at 25 C ZX42; NATO S1714 Test 1 (80 1) Test 1 (80 1) Test 1 (80 1) Not suitable 1) The test fluid shall be agreed between the manufacturer/supplier and the purchaser and shall be documented (see 3i). 2) Defence Standards are obtainable
38、 from Ministry of Defence, Directorate of Standardization. NOTE. Commercial fluids of the types represented by test fluids (c), (d) and (r) will stain subjected sleeving. Sleeves should not be used purely as colour identifiers in areas subject to contamination by the fluids. 4 Materials and characte
39、ristics 4.1 Materials and characteristics Sleeves shall be made from materials that ensure that the finished sleeves conform to the appropriate requirements of clause 12. Printing on sleeves shall conform to clause 8 and the appropriate requirements of table 5. NOTE 1. Materials known to meet the re
40、quirements of the tests specified in clause 12 have the characteristics shown in table 3. NOTE 2. Printing on sleeves may affect properties. NOTE 3. The tests specified in clause 12 are performed on finished sleeves, except for test 12.9. 4.2 Overlays Overlays may be used to provide added protection
41、 for the sleeve or marking, provided the finished sleeve conforms to clause 12. For the purpose of this standard the overlay shall be regarded as part of the sleeve.4 BSI 1997 BS 4G 198 : Part 1 : 1997 Table 5. Type tests Title Clause Finish 12.1 Printing 12.2 Dimensions 12.3 Circumferential extensi
42、on 12.4 Tension set 12.5 Voltage proof 1) 12.6 Resistance to fluids 1) 2) 12.7 Silver staining 2) 12.8 Volume resistivity 12.9 Resistance to extremes of temperature 1) 12.10 Colour fastness to light 1) 2) 3) 12.11 Resistance to mould growth 2) 12.12 Resistance to ozone 12.13 Low temperature flexibil
43、ity 12.14 Flammability 2) 12.15 Thermal endurance 2) 12.16 Extensibility after ageing 12.17 1) If the manufacturer/supplier intends to supply printed sleeves, only printed sleeves shall be tested. 2) For the purposes of this test, one sleeve may be taken as representative of other sizes. 3) All colo
44、urs are to be tested. 5 Colour The colour shall be uniform and evenly dispersed, and where applicable, the colour shall be recognizable as those given in BS 6746C. Standard colours are detailed in table 6. Table 6. Standard colours availability and their allocated numbers Colour Types Printed number
45、 Colour code Black All 0 0 Brown All 1 1 Red All 2 2 Orange All 3 3 Yellow All 4 4 Green All 5 5 Blue All 6. or66 Violet All 7 7 Grey All 8 8 White All 9. or99 Pink All 2L Translucent 3 and 4 TL 6 Finish The sleeves shall be free from bubbles, pinholes, and other defects that may affect performance.
46、 7 Dimensions NOTE. If sizes and/or tolerances other than those specified in this standard are required, full details of the requirements should be specified by the purchaser in the contract or order (see clause 3). 7.1 The internal diameter and the wall thickness of the sleeves shall conform to the
47、 requirements of tables 7, 8, and 9. 7.2 Sleeves shall be supplied to lengths specified by the purchaser and shall be cut to the tolerances specified in table 2. 8 Printing 8.1 When required, sleeves shall be indelibly printed with a character or legend to the specific requirements of the purchaser
48、and such printing shall not be affected by normal handling. 8.2 The printing shall be blue-black except on sleeves that would not provide adequate contrast. The characters shall be clearly printed, of uniform density and shall be legible with normal reading vision. The characters shall be underlined
49、 or have a dot following the legend when it is capable of being misinterpreted e.g M. MW .W6 .69 .9 The printing shall be longitudinal on the sleeve. (See figure 1). 8.3 When sleeves are marked more than once, the printing shall be equally spaced around the sleeve. The characters shall be of a height such that the total number of upper case characters shall cover at least 25 % of the circumference. Lower case characters shall be the same point size as the upper case characters. NOTE. The p
