1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS F 143 : 1993 Incorpora
2、ting Amendment No. 1 ICS 49.025.40 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Specification for Para-aramid braided cords for aerospace purposesThis British Standard, having been prepared under the direction of the Aerospace Standards Policy Committee, was published under
3、 the authority of the Standards Board and comes into effect on 15 October 1993 BSI 1998 The following BSI references relate to the work on this standard: Committee reference ACE/22 Draft for comment 92/80811 DC ISBN 0 580 22508 9 BS F 143 : 1993 Issue 2, July 1998 Amendments issued since publication
4、 Amd. No. Date Text affected 10039 July 1998 Indicated by a sideline in the margin Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Aerospace Standards Policy Committee (ACE/-) to Technical Committee ACE/22, upon which the following bodie
5、s were represented: British Association of Clothing Machinery Manufacturers British Narrow Fabrics Association British Textile Confederation Cordage Manufacturers Institute Lambeg Industrial Research Association Linen Sewing Thread Manufacturers Association Ministry of Defence Society of British Aer
6、ospace Companies Limited Society of Dryers and ColouristsIssue 2, July 1998 BS F 143 : 1993 BSI 1998 i Contents Page Committees responsible Inside front cover Foreword ii Specification 1 Scope 1 2 Normative reference 1 3 General requirements 1 4 Yarn 1 5 Cords 3 6 Identification 3 Tables 1 General r
7、equirements (as given in BS F 100) 1 2 Yarn properties 1 3 Cord construction and properties 2 Figure 1 Braid interlacing 3 List of references Inside back pageBS F 143 : 1993 Issue 2, July 1998 ii BSI 1998 Foreword This British Standard, prepared under the direction of the Aerospace Standards Policy
8、Committee, is one of a series of standards for textiles of a quality suitable for aerospace purposes. During its preparation account has been taken of the fact that basic quality requirements are included in the latest edition of British Standard F 100. This standard specifies requirements for braid
9、ed cords manufactured from flat para-aramid yarn. The quality assurance authority referred to in this standard is as stated in the contract or order, or the accredited representative of the authority stated, as instructed by the prime contractor. A British Standard does not purport to include all th
10、e 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. BSI 1998 1 Issue 2, July 1998 BS F 143 : 1993 Table 1. General requirements (as given in BS F
11、100) Section Title Requirements and tests 1 General All requirements 2 Quality requirements Requirements for the manufacture of cordage only. Requirements for dimensions and tolerances of braided cordage only. Requirements for freedom from corrosive impurities (see section 4). Requirements for freed
12、om from faults of braided cordage only. 3 Physical tests Tests for mass of cord. Tests for breaking strength and extension under force. Tests for plaits per unit length in braided cordage. 4 Chemical tests If required by section 2, further tests for freedom from corrosive impurities. Table 2. Yarn p
13、roperties Nominal linear density Nominal number of filaments Tenacity 1) Extension at break 2) Nominal initial modulus 1)2) dtex cN/tex % cN/tex 220 134 185 to 235 2.5 to 3.5 6500 1100 666 185 to 220 2.9 to 3.8 5500 1670 1000 185 to 220 3.2 to 4.0 5000 1) The values specified are for yarn to which t
14、wist has been added to give optimum tenacity for testing purposes. 2) See 4.4. Specification 1 Scope This British Standard specifies requirements for braided para-aramid cords for aerospace purposes. NOTE. The latest revision, or a new edition, of an Aerospace Series standard is indicated by a prefi
15、x number. 2 Normative reference This British Standard incorporates, by undated reference, provisions from another publication. This normative reference is cited at the appropriate places in the text and the publication is listed on the inside back page. The latest edition of the cited publication ap
16、plies together with any amendments. 3 General requirements In addition to the requirements specified in clauses 4 to 6 of this standard, the following sections and clauses of the latest edition of British Standard F 100 shall apply (see table 1). 4 Yarn 4.1 The cordage shall be manufactured from nat
17、ural colour continuous filament para-aramid yarn, which shall conform to table 2. 4.2 The base yarn shall be flat (no added twist). 4.3 The yarn shall conform to the properties given in table 2 to the satisfaction of the quality assurance authority when assessment is based on the yarn manufacturers
18、quality control procedures. 4.4 The nominal initial modulus specified in table 2 shall be determined from the gradient of the stress-strain curve at a load in the range 35 cN/tex to 40 cN/tex. 4.5 A spin finish shall be applied by the yarn manufacturer to assist braiding.2 BSI 1998 BS F 143 : 1993 I
19、ssue 2, July 1998 Table 3. Cord construction and properties Designation and properties Sheath construction Cord designation Minimum breaking strength Maximum mass per unit length Number of spindles on braider Total number of ends 1) Construction of each end Turns/m Plaits/m Cord interlacing diagram
20、kN g/m dtex (see figure 1) 1208 1.50 1.25 8 + 8 8(S) + 8(Z) 2203 3 100 10 600 60 A 1204 3.33 3.5 8 + 8 8(S) + 8(Z) 1670 120 20 440 40 A 216 3.50 3.125 8 + 8 8 + 8 1670 No added twist 400 40 A 1206 4.45 4.2 8 + 8 8(S) + 8(Z) 1100328 0 10 400 40 A 221 5.20 4.76 4 + 4 4 + 4 16703 3 No added twist 215 2
21、0 A 1205 6.65 6.8 8 + 8 8(S) + 8(Z) 1670327 0 10 300 30 A 1207 8.90 10.0 8 + 8 8(S) + 8(Z) 1670334 0 10 260 26 A 218 10.30 9.52 8 + 8 8 + 8 16703 3 No added twist 275 27 A 1203 14.70 22.5 8 + 8 8 + 8 16703 6 No added twist 250 25 A 267 19.60 22.5 8 + 8 8 + 8 16703 7 No added twist 220 22 A 1209 24.5
22、0 32.5 4 + 4 4(S) + 4(Z) 16703 20 20 2 100 10 B 222 34.30 40.0 8 + 8 16(S) + 16(Z) 1670366 5 6 165 16 A 1211 49.00 65.0 4 + 4 8(S) + 8(Z) 16703 20 20 25 2 3B 225 98.10 130.0 8 + 8 16(S) + 16(Z) 16703 20 20 28 4 8A 226 137.0 195.0 8 + 8 24(S) + 24(Z) 16703 20 20 26 6 6A 1) See 5.1.2. BSI 1998 3 Issue
23、 2, July 1998 BS F 143 : 1993 1) Marking BS F 143 : 1993 on or in relation to a product represents a manufacturers declaration of conformity, i.e. claim by or on behalf of the manufacturer that the product meets the requirements of the standard. The accuracy of the claim is solely the claimants resp
24、onsibility. Such a declaration is not to be confused with third party certification of conformity, which may also be desirable. NOTE. Rectangles with arrows represent a single or group of ends per spindle (carrier). Rectangles (or squares) without arrows represent spaces although ends may expand and
25、 twist up to fill the space. Figure 1. Braid interlacing 5 Cords 5.1 Construction and properties 5.1.1 The cords shall be braided from the yarn constructions specified in table 3. 5.1.2 S twisted ends shall be braided in the Z direction and Z twisted ends shall be braided in the S direction. 5.1.3 W
26、hen tested in accordance with clause 3, the cords as supplied shall conform to table 3. 5.2 Finish The cords shall be supplied unscoured and undyed. 6 Identification The cords shall be identified, for ordering purposes, by the number and date of this British Standard i.e. BS F 143 : 1993 1) , togeth
27、er with the cord designation given in table 3. Example Cord designated 1203 may be identified as BS F 143 : 1993/1203.4 blankBS F 143 : 1993 1) Edition current at time of publication (see clause 3). List of references (see clause 2) Normative references BSI standards publications BRITISH STANDARDS I
28、NSTITUTION, London BS 5F 100 : 1991 1) Procedure for inspection and testing of textiles for aerospace purposesBSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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