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1、BRITISH STANDARD BS 7648:1993 Specification for Double braided ropes made from man-made fibre Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 13:19:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7648:1993 This British Standard, having been prepared under the d
2、irection of the Textiles and Clothing Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 15 June 1993 BSI 06-1999 The following BSI references relate to the work on this standard: Committee reference TCM 45 Draft for comment 91 47153 DC ISBN
3、 0 580 21687 X Committees responsible 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 Committ
4、ee Association of Metropolitan Authorities British Tugowners Association Chief and Assistant Chief Fire Officers Association Cordage Manufacturers Institute Department of Trade and Industry (National Engineering Laboratory) Federation of Wire Rope Manufacturers of Great Britain GMC County Fire Servi
5、ce 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 Scottish Office (Agriculture and Fisheries Department) Textile Institute The followin
6、g bodies were also represented in the drafting of the standard, through subcommittees and panels: British Railways Board Department of Transport (Marine Directorate) Lloyds Register of Shipping Amendments issued since publication Amd. No.DateComments Licensed Copy: London South Bank University, Lond
7、on South Bank University, Fri Dec 08 13:19:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7648:1993 BSI 06-1999i Contents Page Committees responsibleInside front cover Forewordii 1Scope1 2References1 3Definitions1 4Materials1 5Construction and performance2 6Identification3 7Marking and packing3 An
8、nex A (normative) Determination of the mass of rope4 Annex B (normative) Determination of the breaking strength of rope4 Annex C (informative) Recommendations for inspection and care of polyamide and polyester double braided ropes in use5 Annex D (informative) Example of test certificate6 Figure D.1
9、 Example of test certificate 7 Table 1 Requirements for polyamide double braided ropes1 Table 2 Requirements for polyester double braided ropes2 Table 3 Double braided rope constructions2 Table B.1 Realization factors5 List of referencesInside back cover Licensed Copy: London South Bank University,
10、London South Bank University, Fri Dec 08 13:19:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7648:1993 ii BSI 06-1999 Foreword This British Standard has been prepared by the Cordage Manufacturers Institute under the direction of the Textiles and Clothing Standards Policy Committee and includes a
11、revision of those parts of BS 4928:1985 not to be included in a European Standard specification for man-made ropes. BS 4928 will be withdrawn upon publication of the equivalent European standards: EN 7011) Ropes General specification; EN 6961) Ropes Polyamide Specification; EN 6971) Ropes Polyester
12、Specification and EN 6991) Ropes Polypropylene Specification (which will be published in the UK as BS EN 701, BS EN 696, BS EN 697 and BS EN 699 respectively). Assessed capability. Users of this British Standard are advised to consider the desirability of quality system assessment and registration a
13、gainst the appropriate Part of BS 5750 by a third party certification body. 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 confe
14、r immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 8, 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
15、in the amendment table on the inside front cover. 1) In preparation. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 13:19:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7648:1993 BSI 06-19991 1 Scope This British Standard specifies requirements for the manufa
16、cture and construction of double braided ropes made from polyamide or polyester continuous filaments. Methods of testing ropes for the specified properties are given in Annex A and Annex B. These include methods for calculation of the breaking strength from measurements on the individual rope yarns.
17、 NOTE 1In the UK and many other countries, polyamide filament is commonly known as nylon filament. NOTE 2Supplementary information on care and use of double braided ropes made from man-made fibre is given in Annex C. 2 References 2.1 Normative references This British Standard incorporates, by refere
18、nce, provisions from specific editions of other publications. These normative references are cited at the appropriate points in the text and the publications are listed on the inside back cover. Subsequent amendments to, or revisions of, any of these publications apply to this British Standard only
19、when incorporated in it by updating or revision. 2.2 Informative references This British Standard refers to other publications that provide information or guidance. Editions of these publications current at the time of issue of this standard are listed on the inside back cover, but reference should
20、be made to the latest editions. 3 Definitions For the purposes of this British Standard, the definitions given in BS 3724:1991 apply. 4 Materials Only virgin ploymeric material shall be used. The material used in manufacturing the ropes shall be one of the following: a) high tenacity continuous mult
21、ifilament bright polyamide yarn to produce ropes having the characteristics specified in Table 1; b) high tenacity continuous multifilament bright polyester yarn to produce ropes having the characteristics specified in Table 2. Table 1 Requirements for polyamide double braided ropes Nominal diameter
22、 mm Size no.Mass ( 5 %) kg/m Minimum breaking load t Minimum breaking strength kN 60.750.0240.969 810.0401.4514 101.250.0712.7227 121.50.0953.1831 141.750.1194.3242 1620.1595.5054 182.250.2147.0069 212.6250.2859.5093 2430.35712.7124 283.50.48618.0176 3240.63522.0216 364.50.80427.0265 4050.98836.0353
23、 445.51.2042.0412 4861.4350.0490 526.51.6860.0588 5671.9569.0677 607.52.2378.0765 6482.5490.0882 7293.21109.01 070 80103.971381 350 88114.811671 640 96125.721951 910 104136.712322 280 112147.792672 620 120158.933052 990 1281610.23403 330 1441812.84204 120 1682117.45705 590 1922422.87607 450 2162728.
24、89809 410 2403035.61 29912 740 NOTEThe tensile properties of ropes may be expressed either as breaking load (in tonnes) or, preferably, as breaking strength (in kilonewtons). Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 13:19:12 GMT+00:00 2006, Uncontrolled C
25、opy, (c) BSI BS 7648:1993 2 BSI 06-1999 Table 2 Requirements for polyester double braided ropes 5 Construction and performance 5.1 Double braided ropes shall comprise a braided core covered by a braided sheath. NOTEThe finished rope should be flexible and should consist of uniform strands, well laid
26、, and free from significant defects in the yarn, the strand and finishing. 5.2 Half the strands in the core, and half the strands in the sheath shall be of “S” twist, and the other half shall be of “Z” twist. 5.3 With the exception of the requirement given in 5.2, each strand in the core shall have
27、the same construction and each strand in the sheath shall have the same construction. 5.4 Rope construction shall be as given in Table 3. 5.5 The mass of the core shall be 50 % 5 % of the gross mass of the sample of the rope, when determined in accordance with Annex A. NOTE 1Yarns of more than one l
28、inear density may be used in either the sheath strands or the core strands, or in both, in order to produce a rope of the correct mass. NOTE 2Double braided ropes do not require heat treatment after manufacture. 5.6 Where yarns require replacement during the stranding operation, the frequency of suc
29、h replacement shall be not more than once in any 2 m length of strand. 5.7 Each rope shall be continuous throughout its length. NOTEA core or sheath strand may be lengthened during braiding by joining on a fresh strand. The efficiency of such joins depends upon the length of overlap of the sheath or
30、 core over the ends of the incoming or outgoing strands. This overlap should be sufficient to secure the ends of the strand being changed, but should not be excessively long so that they draw the braided parts of their length into the braid when the rope is loaded, thus forming tight strands. 5.8 St
31、rand splices shall not be more frequent than once in 2 m of rope, and the incoming and outgoing ends shall be tucked for at least 150 mm for ropes having diameters of up to 24 mm, and 300 mm for ropes of larger diameter. Table 3 Double braided rope constructions Nominal diameter mm Size no.Mass ( 5
32、%) kg/m Minimum breaking load t Minimum breaking strength kN 60.750.0250.697 810.0481.2212 101.250.0771.9219 121.50.1092.7827 141.750.1433.7837 1620.1954.9549 182.250.2476.4063 212.6250.3458.7286 2430.44011.4112 283.50.59715.2149 3240.77919.8194 364.50.99826.2257 4051.2232.4318 445.51.4737.8371 4861
33、.7645.0441 526.52.0553.5525 5672.3862.1609 607.52.7471.2698 6483.1281.0794 7293.9598.0961 80104.871241 216 88115.911501 471 96127.021751 716 104138.852092 050 112149.562402 354 1201511.02752 697 1281612.52992 932 1441815.83783 707 1682121.55135 031 1922428.16706 570 2162735.68488 316 2403043.91 0471
34、0 268 NOTEThe tensile properties of ropes may be expressed either as breaking load (in tonnes) or, preferably, as breaking strength (in kilonewtons). Nominal diameter mm Minimum number of carriers coresheath 6 to 12816 13 to 24824 25 to 561224 above 561632 Licensed Copy: London South Bank University
35、, London South Bank University, Fri Dec 08 13:19:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7648:1993 BSI 06-19993 5.9 Ropes shall conform to the appropriate mass given in Table 1 and Table 2, when tested in accordance with Annex A. 5.10 The breaking strength of the rope shall conform to the a
36、ppropriate value given in Table 1 and Table 2, when tested in accordance with either sections 9, 10, 11.1 and 11.2 of BS 5053:1985 or Annex B of this standard. 6 Identification 6.1 Rope colour Ropes shall be supplied in natural colour. 6.2 Marker yarns 6.2.1 General The material from which the rope
37、is made shall be identified by the inclusion, outside one of the core strands, of a colour marker yarn as a substitute for one of the yarns in the core strand, or additional to them. If the marker yarn is used in substitution for one of the yarns in the core strand, it shall be of the same material
38、and construction as the other yarns in the outer circle of the core, and differing from them in colour only. NOTEIf the marker yarn is provided as an addition to the normal complement of yarns forming the strand, it may be of an alternative material and construction. 6.2.2 Polyamide ropes A green ma
39、rker yarn shall be used for polyamide double braided ropes. 6.2.3 Polyester ropes A blue marker yarn shall be used for polyester double braided ropes. 7 Marking and packing 7.1 Marking Each coil shall have a label attached on which shall be marked the following information: a) the number and date of
40、 this British Standard, i.e. BS 7648:19932); b) the manufacturers name and trade mark; c) the type of material; d) the length of the rope (determined in accordance with Annex A); e) the size of the rope. NOTEThe information on the label should be marked durably and legibly and the label should be at
41、tached securely to the coil. 7.2 Packing All ropes shall be supplied coiled. NOTECoil lashings should be of similar material to the rope and coils should be protected to prevent damage in transit. 2) Marking BS 7648:1993 on or in relation to a product represents a manufacturers declaration of confor
42、mity, i.e. a claim by or on behalf of the manufacturer that the product meets the requirements of the standard. The accuracy of this claim is solely the claimants responsibility. Such a declaration is not to be confused with third party certification of conformity, which may also be desirable. Licen
43、sed Copy: London South Bank University, London South Bank University, Fri Dec 08 13:19:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7648:1993 4 BSI 06-1999 Annex A (normative) Determination of the mass of rope NOTEThe test may be carried out under ordinary room conditions of temperature and humi
44、dity. In cases of dispute, however, the test should be conducted on a sample which has been conditioned for 48 h in the standard temperate atmosphere for testing given in BS EN 20139:1992, i.e. relative humidity of 65 % r.h. 2 % r.h. and a temperature of 20 C 2 C. The test should then be conducted e
45、ither in this atmosphere or within 15 min of removing the samples from the atmosphere. A.1 Pull a length of rope from the reel or coil and lay it out on the floor. A.2 Connect a suitable length to a dynamometer anchored to the floor. Tension the other end to a load in kilograms equivalent to 8N2 or
46、D2/8 where N is the size number; and D is the nominal diameter in millimetres. Maintain this tension for one minute. At the end of this time, place two marks on the rope at a distance of 2 m apart. Remove the tension and detach the sample from the parent length by cutting cleanly at the two marks. A
47、.3 Weigh the sample and calculate the mass per metre from the result. Weigh the core and the sheath of the sample separately, and calculate their proportions of the whole mass of the rope. Annex B (normative) Determination of the breaking strength of rope B.1 Tensile testing of the rope as a whole C
48、ut a length of rope from the parent length and splice it to form a suitable specimen, which may be tested to destruction using an appropriate tensile testing machine, in accordance with the method given in BS 5053:1985. B.2 Calculation of the estimated breaking strength using the realized breaking s
49、trength method NOTEThis test may be undertaken employing the 2 metre test specimen which was used to determine the mass of the rope in Annex A. B.2.1 Confirm the construction of the rope as follows. a) Count the sheath strands. Let this be Ns. b) Count the core strands. Let this be Nc. c) Determine the construction of the sheath strands by counting the number of yarns forming the strands, and their construction(s). d) Determine the construction of the core strands by counting the numbers of yarns forming the strands, and their constr
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