1、BRITISH STANDARD BS 525:1991 Specification for Fibre cores for wire ropesBS525:1991 This British Standard, having been prepared under the direction of the Textiles and Clothing Standards Policy Committee, was published under the authority of the Board of BSI and comes into effect on 31January1991 BS
2、I 07-1999 First published December1933 Second edition August1953 Third edition January1962 Fourth edition October1973 Fifth edition January1991 The following BSI references relate to the work on this standard: Committee reference TCM/45 Draft for comment90/35890 DC ISBN 0 580 19091 9 Committees resp
3、onsible for this British Standard The preparation of this British Standard was entrusted by the Textiles and Clothing Standards Policy Committee (TCM/-) to Technical Committee TCM/45, upon which the following bodies were represented: Associated Offices Technical Committee Association of Metropolitan
4、 Authorities British Tugowners Association Chief and Assistant Chief Fire Officers Association Cordage Manufacturers Institute Department of Agriculture and Fisheries for Scotland Department of Trade and Industry (National Engineering Laboratory) Federation of Wire Rope Manufacturers of Great Britai
5、n GMC County Fire Service Health and Safety Executive Institution of Fire Engineers Made-up Textiles Association Ministry of Defence National Caving Association National Federation of Master Steeplejacks and Lightning Conductor Engineers The following bodies were also represented in the drafting of
6、the standard, through subcommittees and panels: British Railways Board Department of Transport (Marine Directorate) Lloyds Register of Shipping Amendments issued since publication Amd. No. Date CommentsBS525:1991 BSI 07-1999 i Contents Page Committees responsible Inside front cover Foreword ii 1 Sco
7、pe 1 2 Materials 1 3 Construction 1 4 Chemical content 1 5 Sampling and methods of test 2 6 Packaging and marking 2 Table 1 Tolerances on ordered length L 1 Table 2 Tolerances on nominal diameter and nominal runnage 1 Table 3 Maximum yarn sizes for hard fibre main cores 1 Publication(s) referred to
8、Inside back coverBS525:1991 ii BSI 07-1999 Foreword This revision of BS525, prepared under the direction of the Textiles and Clothing Standards Policy Committee, supersedes BS525:1973 which is withdrawn. In this revision, cores made from soft fibres are no longer included. Construction requirements
9、and tolerances have been aligned with those in ISO4345. The parameter of lay length has been replaced by that of nominal diameter and runnage, and required tolerances for these are given. The methods of test, formerly described in the appendices, have been replaced by references to BS5053. Product c
10、ertification. Users of this British Standard are advised to consider the desirability of third party certification of product conformity with this British Standard based on testing and continuing surveillance, which may be coupled with assessment of a suppliers quality systems against the appropriat
11、e Part of BS5750. Enquiries as to the availability of third party certification schemes will be forwarded by BSI to the Association of Certification Bodies. If a third party certification scheme does not already exist, users should consider approaching an appropriate body from the list of Associatio
12、n members. 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
13、 comprises a front cover, an inside front cover, pages i and ii, pages1 and 2, 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.BS525:1991 BSI 0
14、7-1999 1 1 Scope This British Standard specifies requirements for the construction, size and quality of fibre cores ranging from4mm diameter to24mm diameter for wire ropes and covers the following materials: a) hard fibres: manila and sisal; b) man-made fibres: fibre-forming polyolefins. Hard fibre
15、and man-made fibre cores specified in this standard may be employed as main cores in ropes complying with BS302-1toBS 302-6and other similar standards. NOTEThe titles of the publications referred to in this standard are listed on the inside back cover. 2 Materials Cores shall be made from the follow
16、ing fibres. a) For hard fibre cores, yarns shall be spun from new long fibre as follows: 1) sisal (Agave sisalana) (East African or equivalent); 2) manila (abaca) (Musa textilis). b) For man-made fibre cores, fibre-forming polyolefins (e.g.monofilament and split film polyethylene and polypropylene)
17、shall be used. NOTEAttention is drawn to the fact that some British Standards, including certain specifications for wire ropes and their sockets, may prohibit the use of man-made fibre cores where elevated temperatures are encountered. 3 Construction 3.1 General Cores shall be laid up from not less
18、than three similar and uniform strands. Each coil shall be continuous throughout its length, without core splices. 3.2 Core designation The core shall be designated by its nominal diameter (in mm) and nominal runnage (in m/kg). NOTEThe nominal diameter and nominal runnage should be agreed between th
19、e core manufacturer and the wire rope manufacturer. The core manufacturer shall state whether the runnage is based on the lubricated or unlubricated core. 3.3 Ordered length The tolerances on the ordered length L of the cores shall be as given inTable 1. 3.4 Nominal diameter and nominal runnage The
20、tolerances on nominal diameter and nominal runnage of the cores, expressed as percentages, shall be as given inTable 2. 3.5 Yarn sizes The maximum size of yarn used in the manufacture of hard fibre main cores shall be as given inTable 3. 3.6 Core lubrication Lubricants used to facilitate the prepara
21、tion of hard fibres prior to, and/or in, the process of spinning shall be acid free and shall not contain water. NOTE 1Lubricants are not normally used in the spinning of man-made fibres. NOTE 2The lubricant content of pre-lubricated cores should be agreed between the core manufacturer and the wire
22、rope manufacturer. Table 1 Tolerances on ordered length L Table 2 Tolerances on nominal diameter and nominal runnage Table 3 Maximum yarn sizes for hard fibre main cores 4 Chemical content NOTEAcidity and salt content are normally associated only with natural fibre cores. They may not be applicable
23、to man-made fibre cores. 4.1 Water soluble acids The acidity of the core shall be not more than2mL of0.1mol/L acid per100g of core. Ordered length Tolerance m L k 400 + 5, 0% 400 1 000 + 2, 0% Type of fibre Tolerances on nominal diameter D Tolerances on nominal runnage % % Natural fibre All sizes +
24、5, 0 + 5, 0 Man-made fibre 4 mm k D 12 4.6 NOTEThese sizes are based on the fibre mass of the yarn, exclusive of the effect of any dressing. Yarn sizes of man-made fibres are not specified.BS525:1991 2 BSI 07-1999 4.2 Salt The salt content of the raw fibre, calculated as sodium chloride (NaCl), shal
25、l be not more than0.3%. 5 Sampling and methods of test NOTEShould any sample have properties not in accordance with the requirements of the standard (subject to the application of the appropriate tolerances), the inspector may at his discretion select a further sample from the same coil. In the even
26、t of failure of the second test, the inspector may require replacement of that coil. 5.1 Sampling 5.1.1 Each sample taken shall be representative of the batch. For these purposes, a batch shall consist of coils of core of the same type, grade and size, manufactured under presumed uniform conditions.
27、 5.1.2 The test sample shall be taken from the coil in such a manner that the lay is not disturbed The piece of core upon which the tests are carried out shall be at least5m from the outer end of the coil. In cases of dispute, the coil shall be placed upon a turntable for the purpose of obtaining th
28、e sample. 5.1.3 The sample shall be at least4m long. 5.2 Methods of test 5.2.1 Core diameter and runnage Core diameter and runnage shall be determined in accordance with the methods described in BS5053. The number of tests to be carried out on any batch of coils, except for re-tests, shall not excee
29、d one per coil. 5.2.2 Core lubricant content Core lubricant content shall be determined in accordance with the method described in BS5053. One test shall be carried out on a sample from every50t of core that are produced or annually, whichever is the less frequent. 5.2.3 Water soluble acids Water so
30、luble acids shall be determined in accordance with the method described in BS5053. 5.2.4 Salt content Salt content shall be determined in accordance with the method described in BS5053. 6 Packaging and marking 6.1 Packaging Cores shall be packed in coils or reels of continuous lengths, and securely
31、lashed. No coil shall contain more than one length. All ends shall be secured to prevent unravelling. NOTEAll coils should be suitably protected against the elements during transit, as agreed between the purchaser and the supplier. 6.2 Marking Each coil shall have a label attached on which shall be
32、clearly and legibly marked the following information: a) the name of the core supplier; b) the number and date of this British Standard, i.e.BS525:1991 1) ; c) the type of fibre; d) the nominal length of the core in metres; e) the nominal diameter in millimetres; f) the nominal runnage in metres per
33、 kilogram. 1) Marking BS525:1991 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 is therefore solely the responsibility of the perso
34、n making the claim. Such a declaration is not to be confused with third party certification of conformity, which may also be desirable.BS525:1991 BSI 07-1999 Publication(s) referred to BS 302, Stranded steel wire ropes. BS 302-1, Specification for general requirements. BS 302-2, Specification for ro
35、pes for general purposes. BS 302-3, Specification for zinc coated ropes for ships. BS 302-4, Specification for ropes for lifts. BS 302-5, Specification for ropes for hauling purposes. BS 302-6, Specification for ropes for mine hoisting. BS 5053, Methods of test for cordage and webbing slings and for
36、 fibre cores for wire ropes. BS 5750, Quality systems 2) . ISO 4345, Steel wire ropes Fibre main cores Specification 2) . 2) Referred to in the foreword only.BS 525:1991 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for prepa
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