1、BRITISH STANDARD OBSOLESCENT JULY1978 BS2F52: 1959 (Replacing BS F52) Incorporating Amendment Nos.1 and2 Flax reinforcement webbing for aeronautical purposes UDC 677.11:677.755:629.13BS2F52:1959 This BritishStandard, having been approved by the Aircraft Industry Standards Committeeand endorsed by th
2、eChairman of the EngineeringDivisional Council,was published under theauthority of the General Council of the Institution on 31October1959 BSI03-2000 The following BSI references relate to the work on this Standard: Technical Committee ACE/21 Draft for comment CT (ACE)7184 ISBN 0 580 34565 3 Forewor
3、d This BritishStandard, one of a series for textiles of a quality suitable for aeronautical purposes, has been revised. During the revision, minor changes only have been made to the technical requirements, but the standard now provides for various widths of webbing. The standard also provides for th
4、e webbing to be rot-proofed and stipulates dye fastness properties for webbing when required in the dyed condition. Provision is now made for the webbing to be identified by a code reference and information regarding the metric equivalents of British units is given in the Appendix. The figures in Br
5、itish units are to be regarded as the standard. This Standard makes reference to the following BritishStandards: BSF100, Inspection and testing procedures for textiles for aeronautical purposes. BS1006, Determination of fastness to daylight of coloured textiles. BS2087, Chemical requirements for tex
6、tiles treated by certain preservative processes. BS2681, Colour fastness to water. 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 itsel
7、f confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, pages1 and2 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 t
8、able on the inside front cover. Amendments issued since publication Amd. No. Date of issue Comments 5244 May1964 2664 July1978BS2F52:1959 BSI 03-2000 i Contents Page Foreword Inside front cover 1 Scope 1 2 Yarn 1 3 Manufacture 1 4 Construction and properties 1 5 Freedom from defects 1 6 Finish 1 7 S
9、ampling and testing 1 8 Identification 1 Appendix Metric equivalents of British units 2 Table 1 1ii blankBS2F52:1959 BSI 03-2000 1 1 Scope This BritishStandard specifies the requirements for flax reinforcement webbing for aeronautical purposes. 2 Yarn a) Unsized flax yarn shall be used in the manufa
10、cture of the webbing. b) The Residual Alkali Solubility of the yarn shall not exceed1.5per cent. 3 Manufacture a) The weave shall beV twill. b) The selvedges shall be evenly and firmly woven. 4 Construction and properties a) Webbing of the widths listed in Table 1 shall comply with the requirements
11、of the Table. b) Webbing of widths other than those listed in Table 1 may be supplied in accordance with this BritishStandard. In webbing of other widths the details of construction and the properties which are dependent on width shall be proportional to those specified in Table 1; in other respects
12、 the webbing shall comply with the requirements of the Table. 5 Freedom from defects The webbing shall be as free as possible from defects, to the satisfaction of the Inspector. 6 Finish a) If rot-proofing is required, the webbing shall be rot-proofed with: i) Pentachlorophenyl laurate, in accordanc
13、e with BS2087. This proofing is colourless. or ii) Mineral Khaki followed by treatment with pentachlorophenyl laurate (khaki colour conferred by the Mineral Khaki). The treatments shall be in accordance with BS2087 except that the stitch finish required in association with the Mineral Khaki shall be
14、 such that the total of solvent soluble matter (pentachlorophenyl laurate plus paraffin wax) shall be not less than3 and not more than5per cent. b) If dyeing is required, the colour shall be as stipulated in the contract or order. A Sulphur dye shall not be used. The fastness of the colour to light
15、shall be not less than standard5 when tested by the method described in BS1006, and the fastness of the colour to water shall be rating5 when tested by the method described in BS2681. (Type tests.) 7 Sampling and testing a) Unless otherwise agreed with the Inspecting Authority, the selection of samp
16、les and tests for Residual Alkali Solubility, weight and breaking strength shall be in accordance with BS F100. b) Tests designated as “Type tests” shall be dealt with as defined in BS F100. 8 Identification The webbing shall be identified for ordering purposes by the number of this BritishStandard,
17、 together with the relevant designation quoted in Table 1 and, if required dyed, a reference to the colour. For example,1# in. webbing, dyed khaki, shall be identified as “BS2F52/1# in/6b khaki”. Table 1 2 2 - Webbing designation Width of webbing Nominal counts of yarn, warp and weft Ends in width P
18、icks per inch Maximum weight per 144 yards Minimum breaking strength inch lb lb 1inch 1 + 1 / 32 0 14s/4 56 2 19 1 13 615 1 3 / 4inch 1 3 / 4 +0 1 / 16 14s/4 94 2 19 1 22 1080BS2F52:1959 2 BSI 03-2000 Appendix Metric equivalents of British units The metric conversions are approximate. More accurate
19、conversions should be based on the tables in BS350 “Conversion factors and tables”, or BS947 “Yarn count systems and their conversion”. British unit Metric equivalent 1inch 1yard 1pound 1thread per inch Yarn count (linen wet-spun) 25.4 millimetres 0.91 metres 0.45 Kilogrammes 3.94 threads per10 cent
20、imetres 1654 Yarn count -Tex =blankBS2F52: 1959 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents the UK view on standards in Europe and at the international level. It is incorporated b
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