1、BRITISH STANDARD AEROSPACE SERIES BS 8F 35:2002 (Superseding BS 7F 35:1985) Braided linen (flax) lacing cord for aerospace purposes ICS 49.025.60 BS 8F 35:2002 This British Standard, having been prepared under the direction of the Engineering Sector Policy and Strategy Committee, was published under
2、 the authority of the Sector Policy and Strategy Committee on 17 October 2002 BSI 17 October 2002 First published BS F 35:1919 Second edition BS 2F 35:1924 Third edition BS 3F 35:1930 Fourth edition BS 4F 35:1938 Fifth edition BS 5F 35:1960 Sixth edition BS 6F 35:1975 Seventh edition BS 7F 35:1985 E
3、ighth edition BS 8F 35:2002 The following BSI references relate to the work on this standard: Draft for comment 00/707929 DC Committee reference ACE/22 ISBN 0 580 37033 X Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee AC
4、E/22, Cords, ropes and threads for aerospace purposes, upon which the following bodies were represented: Linen Sewing Threads Manufacturers Association Ministry of Defence UK Defence Standardization Society of British Aerospace Companies Ltd. Amendments issued since publication Amd. No. Date Comment
5、sBS 8F 35:2002 BSI 17 October 2002 i Contents Page Committees responsible Inside front cover Foreword ii 1S c o p e 1 2 Normative references 1 3G e n e r a l 1 4Y a r n 1 5 Finish 2 6 Construction and properties 2 7 Identification 2 Bibliography 3 Table 1 General requirements (given in BS F 100) 1 T
6、able 2 Construction and properties 2BS 8F 35:2002 ii BSI 17 October 2002 Foreword This British Standard, prepared under the direction of Technical Committee ACE/22, is one of a series for textiles of a quality suitable for aerospace purposes. It supersedes BS 7F 35:1985 which is withdrawn. NOTE The
7、previous edition, BS 7F 35:1985, differed from the earlier edition in that it required all cord be supplied rotproofed. This new edition incorporates all earlier amendments, updates references and improves nomenclature in line with other standards in the same series. This publication does not purpor
8、t to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. WARNING NOTES This standard calls for the use of substances and/or test procedures that may be inj
9、urious 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 manufacture or use. This standard specifies pentachlorophenyl laurate (PCPL)
10、 as the only approved rotproofing treatment for aerospace textiles. Alternative treatments are under development, and this standard will be updated to delete PCPL as soon as an approved alternative treatment for aerospace textiles is available. Summary of pages This document comprises a front cover,
11、 an inside front cover, pages i and ii pages 1 to 3 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued.BS 8F 35:2002 BSI 17 October 2002 1 1 Scope This British Standard specifies requirements for a braided linen (flax) lacing cord for ae
12、rospace purposes. NOTE The latest revision of an Aerospace Series standard is indicated by a prefix number. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references,
13、the latest edition of the referenced document (including any amendments) applies. BS F 100, Procedure for inspection and testing of textiles. BS 2087-1, Preservative treatments for textiles Specification for treatments. BS EN ISO 2060:1995, Textiles Yarn from packages Determination of linear density
14、 (mass per unit length) by the skein method 3 General In addition to the requirements specified in Clause 4, Clause 5, Clause 6 and Clause 7 of this standard the requirements and tests given in the latest edition of BS F 100 as specified in Table 1, shall apply. Table 1 General requirements (given i
15、n BS F 100) 4 Yarn 4.1 The cord shall be manufactured from flax fibre (Linum usitatissimum). 4.2 The mass of the yarn shall have been reduced by not less than 10 % by boiling. NOTE The degree of boiling of the yarn should be determined from the manufacturers records, if available. Otherwise, the res
16、idual alkali solubility of the cord should be determined and should not exceed 10 %. Section of BS F 100 Section title Requirements and tests 1 General All requirements 2 Quality requirements Requirements for manufacture of cordage only Requirements for dyed textiles except those related to fabric i
17、ntended for coating Requirements for dimensions and tolerances of length of cordage except those relating to laid ropes Requirements for freedom from corrosive impurities (see BS F 100, Section 4) Requirements for freedom from faults of braided cordage only 3 Physical tests Tests for breaking streng
18、th and extension under force Tests for plaits per unit length in braided cordage 4C h e m i c a l tests Test for residual alkali solubility If required by BS F 100, Section 2: test for conductivity of aqueous extract; test for pH value of aqueous extract; test for water soluble chloride; test for wa
19、ter soluble sulfate.BS 8F 35:2002 2 BSI 17 October 2002 5 Finish 5.1 Condition of material The cord shall be supplied in one of the following conditions: a) undyed and rotproofed; b) undyed, rotproofed and wax finished; c) dyed and rotproofed; d) dyed, rotproofed and wax finished. 5.2 Dyeing Where d
20、yeing is required, the colour shall be specified either by reference to a British Standard, e.g. BS 381C, or otherwise by pattern. 5.3 Rotproofing The cord shall be treated with pentachlorophenyl laurate (PCPL) from aqueous emulsion, in accordance with BS 2087-1, normal process. 5.4 Wax finishing Wh
21、ere wax finishing is required, beeswax substitute microcrystalline hydrocarbon wax shall be used and the added mass due to the wax shall be (30 ) %. Prior to waxing, the cord shall have been rotproofed in accordance with 5.3. 5.5 Surface finish Cord supplied in accordance with item 5.1a) or 5.1c) sh
22、all have a soft, smooth finish, but substances which may promote microbiological growth (e.g. starch or modified starch) shall not be applied. 6 Construction and properties The cord shall conform to the requirements given in Table 2 and the braid interlacing shall be one under two over two. Table 2
23、Construction and properties 7 Identification The cord shall be identified for ordering purposes by the number of this British Standard, i.e. BS 8F 35, together with the finish and, if required dyed, the colour. NOTE This identification may be codified. For example, cord required dyed black and wax f
24、inished may be identified as “BS 8F 35/black/wax finished”. Nominal resultant linear density Number of carriers Number of yarns per carrier Plaits per metre Length per unit mass a Minimum breaking strength unwaxed waxed tex m/kg N N 910 16 1 355 40 1 100 100 220 180 a The length per unit mass shall
25、be determined in accordance with BS EN ISO 2060:1995, Option 1. The values stated for length per unit mass exclude the mass of added dye and/or finishes. 5 + 10 BS 8F 35:2002 BSI 17 October 2002 3 Bibliography Standards publications BS 381C:1996, Specification for colours for identification, coding
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