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1、BRITISH STANDARD AEROSPACE SERIES BS PL 8:2005 Fibrous polyamide material for use as an explosion suppressant and as a baffle material in aircraft fuel tanks Specification ICS 49.025.40; 83.120 ? Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:06:53 GMT+00:00
2、 2006, Uncontrolled Copy, (c) BSI BS PL 8:2005 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 10 June 2005 BSI 10 June 2005 The following BSI references relate to the work on this standard: Committee reference ACE/65 Draft for comment 04/301
3、15934 DC ISBN 0 580 45903 9 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee ACE/65, Inspection and testing requirements for non-metallic materials, upon which the following bodies were represented: British Hydromechanics
4、Research Group British Plastics Federation Society of British Aerospace Companies Ltd. Co-opted members The following bodies were also represented in the drafting of this standard, through panel ACE/65/-/64, Structural reinforced plastic: Defence Science and Technology Laboratory Co-opted members Am
5、endments issued since publication Amd. No.DateText affected Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:06:53 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS PL 8:2005 BSI 10 June 2005 i Contents Page Committees responsibleInside front cover Forewordii 1Sco
6、pe 1 2Normative references 1 3Terms and definitions 1 4Material 1 5Properties 1 6Quality of material 2 7Marking, labelling and packaging 3 Table 1 Properties of the material 2 Table 2 Sheet density 2 Table 3 Physical and mechanical properties 2 Table 4 Fuel retention 2 Licensed Copy: London South Ba
7、nk University, London South Bank University, Sat Dec 09 03:06:53 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS PL 8:2005 ii BSI 10 June 2005 Foreword This British Standard has been prepared under the direction of ACE/64/-65. With BS PL 9, this document supersedes DTD 5627, April 1982, which was decl
8、ared obsolescent by the Ministry of Defence from 1st April 1999. Test methods associated with this specification are published separately as BS PL 9. This British Standard calls for the use of substances and/or procedures that may be injurious to health if adequate precautions are not taken. It refe
9、rs only to technical suitability and does not absolve the user from legal obligations relating to health and safety at any stage. 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. Compl
10、iance 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 ii, pages 1 to 3 and a back cover. The BSI copyright notice displayed in this document indicates when the document was la
11、st issued. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:06:53 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS PL 8:2005 BSI 10 June 2005 1 1 Scope This British Standard specifies requirements for polyamide fibrous material intended for suppression of explosi
12、ons in aircraft fuel tanks. The material may be supplied as flat sheets or preformed shapes. NOTE The material is intended for use in integral, rigid or flexible aircraft fuel tanks containing such fuels as Avtur, Avcat and Avtag at temperatures up to 110 C with intermittent peaks up to 130 C. 2 Nor
13、mative references The following referenced documents are indispensable for the application of this document. For dated references, only the reference cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. BS PL 9, Fibrous polyamide ma
14、terial for use as an explosion suppressant and as a baffle material in aircraft fuel tanks Test methods. 3 Terms and definitions For the purposes of this British Standard, the following terms and definitions apply. 3.1 melding process in which bonds are formed between fibres in contact with each oth
15、er by raising their temperature to a point where the polymer forming the surface layer softens sufficiently for bonding to occur. 4 Material The sheet material or preformed shapes shall be manufactured to issue-controlled documents, which shall form part of the contract between purchaser and manufac
16、turer. Changes to the manufacturing process shall not be made without due consideration being given that the modified material meets all the requirements of the standard. 5 Properties 5.1 General The sheet material shall consist of fibrous polyamide material bonded together by a melding process with
17、out the use of adhesive. The fibre incorporated in the sheet material shall be white in colour, and the sheet material shall have a minimum polyimide content of 99 %. The material shall lie substantially flat on both of the main surfaces. The material shall not chemically interact with nor cause phy
18、sical damage to rigid or flexible fuel tanks and sealants used in these tanks. The standard size of sheet shall be 480 480 120 mm with the main fibre orientation being in the 480 mm direction and density gradient in the 120 mm direction, or as otherwise agreed between the purchaser and manufacturer.
19、 Material supplied in sheet form shall be free from surface imperfections or any other defect that would impair satisfactory performance. Surface imperfections can be supplied in material that is preformed prior to installation provided such imperfections are identified by their nature and level of
20、incidence for the purchaser to accept. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:06:53 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS PL 8:2005 2 BSI 10 June 2005 5.2 Properties of the material The material shall meet the requirements of Table 1 when tes
21、ted in accordance with BS PL 9. Extract test samples from sheet submitted for test in accordance with Figure A1 of BS PL 9. Table 1 Properties of the material 6 Quality of material Each sheet of material manufactured when tested in accordance with BS PL 9 shall meet the requirements of Table 2. Tabl
22、e 2 Sheet density A representative sheet of each manufactured batch of material when tested in accordance with BS PL 9 shall meet the requirements of Table 3. Table 3 Physical and mechanical properties A representative sheet from every twentieth batch of material when tested in accordance with BS PL
23、 9 shall meet the requirements of Table 4. Table 4 Fuel retention PropertyRequirement a) Density, g/l 8.5 1 b) Density gradient (maximum) 1.25 c) Fibre diameter, 4m 41.5 3 d) Grab strength, N (minimum)400 e) Initial 50 % compression force, N (minimum) 5 f) Loss of compression force after five cycles
24、 to 50 % compression, % (maximum) 4 g) Compression set, % (maximum) 2 h) Contaminants (extractable), % (maximum) 0.2 j) Fuel retention, % (maximum) 4.5 k) FlammabilitySelf-extinguishing PropertyRequirement Sheet density, g/l8.5 2 PropertyRequirement a) Density, g/l 8.5 1 b) Density gradient, (maximu
25、m) 1.5 c) Grab strength, N (minimum)300 d) Initial 50 % compression force, N (minimum) 2.5 e) Loss of compression force after five cycles to 50 % compression, % (maximum) 5 f) Compression set, % (maximum) 3 g) Contaminants (extractable), % (maximum) 0.2 PropertyRequirement Fuel retention, % maximum4
26、.5 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:06:53 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS PL 8:2005 BSI 10 June 2005 3 7 Marking, labelling and packaging1) The labelling of the material shall consist of the following details in the following orde
27、r: a) the number and date of this standard, i.e. BS PL 8:2005; b) the manufacturers name or trade mark, e.g. AB and Co.; c) the date of manufacture; d) the batch number. Each sheet of material shall be enclosed in a heat sealed polyethylene film envelope and a label shall be securely attached to the
28、 film stating the requirements above and the sheet number. 1)Marking BS PL 8:2005 on or in relation to a product represents a manufacturers declaration of conformity, i.e. a claim by or on behalf of the manufacturer that the product meets the requirements of the standard. The accuracy of the claim i
29、s solely the claimants responsibility. Such a declaration is not to be confused with third-party certification of conformity. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:06:53 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS PL 8:2005 BSI 389 Chiswick High R
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