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1、BRITISH STANDARD AEROSPACE SERIES BS F 130:1987 Specification for Rubber bonded compressed aramid fibre jointing material for aerospace purposes UDC 629.7.063:62-762.4:677.143.3:678.4.029.5 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:02:20 GMT+00:00 2006,
2、 Uncontrolled Copy, (c) BSI BS F 130:1987 This British Standard, having been prepared under the direction of the Aerospace Standards Committee, was published under the authority of the Board of BSI and comes into effect on 30 January 1987 BSI 02-2000 The following BSI references relate to the work o
3、n this standard: Committee reference ACE/25 Draft for comment 85/75710 DC ISBN 0 580 15343 6 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Aerospace Standards Committee (ACE/-) to Technical Committee ACE/25 upon which the following bod
4、ies were represented: British Compressed Gases Association British Narrow Fabrics Association British Rubber Manufacturers Association Ministry of Defence Society of British Aerospace Companies Limited Coopted members Amendments issued since publication Amd. No.Date of issueComments Licensed Copy: L
5、ondon South Bank University, London South Bank University, Sat Dec 09 03:02:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS F 130:1987 BSI 02-2000i Contents Page Committees responsibleInside front cover Forewordii 1Scope1 2Definition1 3Material designation1 4Material1 5Quality and finish1 6Thicknes
6、s1 7Creep2 8Flexibility2 9Resistance to liquids2 10Compressibility2 11Adhesion and corrosion2 12Sampling2 13Identification2 Appendix A Method of test for thickness3 Appendix B Method of carrying out creep test3 Appendix C Method of test for flexibility8 Appendix D Method of test for resistance to li
7、quids8 Appendix E Method of test for compressibility8 Figure 1 Typical arrangement of creep test apparatus4 Figure 2 Details of creep test apparatus5 Table 1 Thickness and tolerance1 Table 2 Resistance to liquids2 Publications referred toInside back cover Licensed Copy: London South Bank University,
8、 London South Bank University, Sat Dec 09 03:02:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS F 130:1987 ii BSI 02-2000 Foreword This British Standard, prepared under the direction of the Aerospace Standards Committee, may in certain applications be an alternative to BS F 125. The attention of th
9、e designer is particularly drawn to limitations in use at high temperatures and/or certain fluid environments. This British Standard deals only with asbestos-free jointing materials. WARNING. This British Standard calls for the use of substances and/or procedures that may be injurious to health if a
10、dequate precautions are not taken. It refers only to the technical suitability and does not absolve the user from legal obligations relating to health and safety at any stage. Attention is drawn particularly to the Health and Safety at Work etc. Act 1974 in respect of the control of respirable dusts
11、. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprise
12、s a front cover, an inside front cover, pages i and ii, pages 1 to 10, an inside back cover and a back cover. This standard has been updated (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 S
13、outh Bank University, London South Bank University, Sat Dec 09 03:02:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS F 130:1987 BSI 02-20001 1 Scope This British Standard specifies requirements for the manufacture and testing of rubber bonded compressed aramid (aromatic polyamide) fibre jointing ma
14、terial for aerospace purposes, with or without wire mesh reinforcement and with or without graphite treated surfaces. NOTE 1The titles of the publications referred to in this standard are listed on the inside back cover. NOTE 2The latest revision of an Aerospace Series standard is indicated by a pre
15、fix number. 2 Definition For the purposes of this British Standard the following definition applies. batch of material a single mix of ingredients that is uniquely identified and traceable 3 Material designation The material shall be designated by one of the following: 4 Material 4.1 The material sh
16、all consist of aramid fibres and inorganic fillers bonded with a suitable rubber or blend of rubbers, and shall be manufactured in the form of sheets. The major reinforcing fibre shall be aramid. The fibres shall be finely divided and uniformly dispersed throughout the jointing. Asbestos fibres shal
17、l not be used. NOTEHealth warning. During manufacture and subsequent cutting and handling of jointing materials containing aramid fibre, dust will be released into the workroom atmosphere. Some of this dust will be in the respirable size range. Health and safety legislation requires this dust to be
18、controlled, preferably at source, so as to minimize the risk of inhalation so far as is reasonably practicable. 4.2 Where a wire mesh reinforcement (type W or WG) is specified, this shall be of aperture size 0.25 mm to 1.00 mm with wire diameter 0.12 mm to 0.32 mm in both the warp and weft direction
19、s. The diameter of the wire shall be not greater than 40 % and not less than 7.5 % of the sheet thickness and shall be central in the thickness of the sheet. The wire mesh reinforcement shall be a single-ply of mild steel. Alternative wire material, mesh sizes and wire diameter shall be subject to c
20、ontract or order. 4.3 The surface of the sheets of types AG and WG shall be treated with graphite. NOTEIt is recognized that in certain environments graphite treated material may cause corrosion. It is therefore the responsibility of the user to ensure that no corrosion hazard exists within a partic
21、ular application when graphite treated material is specified (see clause 11). 5 Quality and finish 5.1 All types The sheets of all types of jointing shall be solid run (not laminated), of uniform texture, smooth on both sides and free from irregularities such as blisters, tears and lumps. NOTEIt is
22、recommended that the standard of finish is agreed between the purchaser and the manufacturer at the time of the contract or order. 5.2 Additional requirements for types AG, W and WG 5.2.1 Type AG. The surface coating of graphite shall be continuous on both sides of the sheet and free from inclusions
23、, runs and holes. 5.2.2 Type W. There shall be no exposed wire on either surface of the sheet. NOTESlight pattern marking is acceptable. 5.2.3 Type WG. Type WG shall comply with 5.2.2 and additionally the surface coating shall be continuous on both faces of the sheet and free from inclusions, runs a
24、nd holes. 6 Thickness 6.1 Nominal thicknesses of sheets shall be 0.4, 0.5, 0.75, 1.0, 1.5, 2 and 3 mm. 6.2 The maximum permissible variation of any sheet, when tested using the apparatus described in Appendix A, shall be in accordance with Table 1. Table 1 Thickness and tolerance type Aaramid fibre;
25、 type Waramid fibre with wire mesh reinforcement; type AG aramid fibre with graphite treated surfaces; type WG aramid fibre with wire mesh reinforcement and graphite treated surfaces. Nominal thickness of sheet Maximum permissible variation from nominal thickness Maximum permissible variation betwee
26、n points not more than 250 mm apart mm mm mm 0.4 and 0.5 0.75 and 1.0 1.5 and 2.0 3.0 0.05 0.10 0.15 0.20 0.05 0.10 0.10 0.15 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:02:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS F 130:1987 2 BSI 02-2000 7 Creep
27、The median creep value for all nominal thickness of jointing from 0.75 mm to 3 mm inclusive shall be not more than 12.5 % when tested in accordance with Appendix B. NOTE 1Material of less than 0.75 mm nominal thickness is not tested due to difficulties in taking satisfactory measurements. NOTE 2Limi
28、ts are not specified for wire reinforced jointing, since creep values will depend upon the gauge and aperture of the wire reinforcement. 8 Flexibility The flexibility of the material in the as supplied condition shall be such that, when tested in accordance with Appendix C, it shall not crack or del
29、aminate. 9 Resistance to liquids The materials shall meet the requirements given in Table 2, when tested in accordance with Appendix D. Table 2 Resistance to liquids 10 Compressibility When tested in accordance with Appendix E, the compressibility of the material shall be between 6.0 % and 14.0 %. 1
30、1 Adhesion and corrosion There shall be no adhesion or corrosion when all types of materials are tested in accordance with method A of BS 903-A37, under the following conditions. a) Dry air at 150 C. b) Oil no. 1 at 150 C. c) Liquid 101 at 150 C. d) Liquid B at 40 C. The test sandwich comprising ste
31、el and aluminium as defined in method A of BS 903-A37 shall be assembled dry and immersed in the test medium for 7 days. Testing with other metals shall be subject to contract or order. 12 Sampling 12.1 General Material from which sheets of all types of jointing are manufactured shall be in accordan
32、ce with clauses 4 to 11. 12.2 Types A and AG 12.2.1 A representative sample from sheets from each type and thickness manufactured from each batch of material shall comply with clauses 7 to 10. 12.2.2 Each sheet shall comply with the relevant paragraph of clauses 5 and 6. 12.3 Types W and WG 12.3.1 A
33、 representative sample from each type and thickness shall comply with clauses 71) and 8, and (excluding the flexibility test called up in Table 2) clause 9. 12.3.2 Each sheet shall comply with the relevant paragraphs of clauses 5 and 6. 12.4 All types The first batch tested shall comply with clause
34、11. Subsequent changes in formulation or method of manufacture shall necessitate a repeat testing for compliance. 13 Identification Each sheet shall be identified by the number and date of this British Standard (BS F 130:19872), the type, nominal thickness (e.g. 0.5 mm), direction of rolling, makers
35、 identification, batch number and year and quarter of manufacture. Test Test liquids and temperatures Oil no. 1a at 150 C Liquid 101a at 150 C Liquid Ba at 23 C Thickness change % Mass change % 0 to + 12 0 to + 15 0 to + 12 0 to + 15 0 to + 12 0 to + 15 FlexibilityShall not crack or delaminate Appea
36、rance and condition The surface shall show no signs of tackinessb a Defined in BS 903-A16. b Discoloration and surface blistering are acceptable. 1) Limits when required by the purchaser should be stated on the contract or order. 2) Marking BS F 130:1987 on or in relation to a product is a claim by
37、the manufacturer that the product has been manufactured to the requirements of the standard. The accuracy of such a claim is therefore solely the manufacturers responsibility. Enquiries as to the availability of third party certification should be addressed to the appropriate certification body. Lic
38、ensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:02:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS F 130:1987 BSI 02-20003 Appendix A Method of test for thickness The material thickness shall be measured with a dial type dead weight micrometer. This equipment s
39、hall read to the nearest 0.01 mm. The flat presser foot shall have a diameter of 6.40 0.10 mm. The anvil shall be flat and have a diameter of not less than that of the presser foot. The total force on the presser foot shall be 2.50 0.20 N. Appendix B Method of carrying out creep test B.1 Apparatus B
40、.1.1 The general arrangement and details of the apparatus are given in Figure 1 and Figure 2 and shall be as described in B.1.2 to B.1.7. B.1.2 Two heated compression platens shall be made of steel complying with BS 970-1 (150M19). The faces of the platens shall be plane, parallel and ground to a su
41、rface finish of not more than 0.4 4m. B.1.3 The heating of the apparatus shall be controlled to give a uniform temperature rise from room temperature to 300 5 C in 30 1 min. The difference between the temperature of the two platens shall not exceed 5 C at any time. B.1.4 The sheathed thermocouple ju
42、nctions shall be firmly pressed against the ends of the locating holes. B.1.5 The dial gauge shall comply with BS 907 and shall be graduated in units of 0.002 mm. The dial gauge holder shall be water-cooled under conditions that are reasonably similar to those pertaining to the jig yield determinati
43、on (see B.4). B.1.6 The two platens shall be placed between the loading anvils of a compression loading device. One anvil of the device shall be self-aligning. Means shall be provided for measuring the applied load to an accuracy of 500 N. B.1.7 The assembly shall be shielded from draughts or any se
44、vere changes in ambient temperature when in use. B.2 Preparation of test pieces Three test pieces shall be used. The test piece shall be an annular ring cut from the jointing material under test to an external diameter of 75 mm and an internal diameter of 55 mm. It shall be cut with a die that leave
45、s no burred edges and the bore and outside diameter shall be concentric. The specimens shall be conditioned in a desiccator at room temperature for at least 24 h immediately before the test. B.3 Procedure B.3.1 Ensure that the apparatus is at room temperature before commencing the test. B.3.2 Measur
46、e the thickness of each test piece to an accuracy of 0.01 mm at three points approximately 120 apart, the average reading being recorded as the initial thickness, t. B.3.3 Lock the dial gauge into its holder so that the tip of the silica rod protrudes below the surface of the upper platen to allow c
47、ontact with the lower platen when the test piece is in position. B.3.4 Position the test piece concentrically between two rings of thin aluminium foil having external and internal concentric diameters of 100 mm and 40 mm respectively. Place the test piece and aluminium foil centrally between the pla
48、tens. B.3.5 Apply a force of 90 0.5 kN in 25 5 s and maintain this load constant throughout the test period. B.3.6 Wait 5 min. B.3.7 Switch on the heaters and control the equipment to give a uniform temperature rise to 300 5 C in 30 1 min. Note the dial gauge readings at temperatures of 50 C (t50) a
49、nd 300 C (t300). B.3.8 Allow the apparatus to cool and repeat the test with each of the other test pieces. B.4 Correction for jig distortion Since the movement indicated by the dial gauge depends on the thermal and mechanical characteristics of the jig in addition to the effect produced by the test piece, it is necessary to make a correction by carrying out a dummy test on a steel annulus in order to determine the correction for jig distortion (see note to B.5). For this purpose the annulus shall be made of the same ste
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