1、BRITISH STANDARD BS 183:1972 Incorporating Amendment Nos. 1 and 2 Specification for General purpose galvanized steel wire strandBS183:1972 This British Standard, having been approved by the Iron and Steel Industry Standards Committee, was published underthe authority of the Executive Board on 19June
2、1972 BSI 01-2000 First published (as part of BS16:1905) First published (as BS 174 to 184) February 1923 First published (as BS 182 to 184) May 1927 First revision October 1938 First published as BS 183 June 1972 The following BSI references relate to the work on this standard: Committee reference I
3、SM/26 Draft for comment 71/41979 ISBN 0580 07253 3 Co-operating organizations The Iron and Steel Industry Standards Committee, under whose supervision this British Standard was prepared, consists of representatives from the following Government departments and scientific and industrial organizations
4、: The scientific and industrial organizations marked with an asterisk in the above list, together with the following, were directly represented on the committee entrusted with the preparation of this British Standard: British Cast Iron Research Association Lloyds Register of Shipping British Constru
5、ctional Steelwork Association Ministry of Defence, Army Department British Ironfounders Association Ministry of Defence British Mechanical Engineering Confederation National Association of Drop Forgers 2) stay strand for poles supporting overhead cables, domestic TV aerials and similar applications;
6、 3) signalling strand. The standard does not specify requirements for strands used in major civil engineering works, such as prestressed concrete, suspension bridges and TV and radio transmission masts. A British Standard does not purport to include all the necessary provisions of a contract. Users
7、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 comprises a front cover, an inside front cover, pages i and ii, pages1 to 6, an inside back cover and a bac
8、k 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.BS183:1972 BSI 01-2000 1 1 Scope This British Standard specifies requirements for seven tensile strength grades of galvanized
9、 steel wire strand in sizes from1.7mm to23.8mm diameter, intended for a variety of purposes including railway signalling strand. NOTEThe titles of the British Standards referred to in this standard are listed on page ii. 2 Definitions For the purposes of this British Standard the following definitio
10、ns apply: 2.1 strand three or more wires twisted together with a uniform lay 2.2 direction of lay the direction of lay is defined as right-hand or left-hand with right-hand lay, the wires conform to the direction of the central part of the letter Z when the strand is held vertically. With left-hand
11、lay, the wires conform to the direction of the central part of the letter S when the strand is held vertically 2.3 coil one continuous length of strand wound uniformly in approximately concentric rings 2.4 bundle two or more coils securely bound together 2.5 test piece a length of strand taken for t
12、est in accordance with this standard 3 Designation The type of wire strand is designated by construction and grade. The construction is the number of wires followed by the wire diameter inmm, e.g.3/1.80except in the case of railway signalling strand when the number of wires is followed by the letter
13、s “RS”, e.g.7/RS. The grade is the nominal tensile strength of the strand in N/mm 2 . Examples of the complete designation are3/1.80/350and7/RS/350. 4 Information to be supplied by the purchaser The following information should be given on the enquiry or order: 1) The type of wire strand required, d
14、escribed by the number of this standard and the appropriate designation, e.g.BS183; designation3/1.80/350. 2) The mass of strand required. 3) In the case of coils, whether they are required to be dipped in an oil or other protective compound. 4) If inspection and testing is to be carried out in acco
15、rdance with the method of acceptance testing based on inspection by attributes (seeClause6). 5 Manufacture 5.1 Wire 5.1.1 Material. The wire shall be drawn from steel, made by any process except that the air, and mixed air-oxygen, bottom blown basic converter shall not be used. 5.1.2 Galvanizing. Th
16、e galvanized coating shall comply with the requirements of BS443, unless otherwise agreed between purchaser and manufacturer. 5.1.3 Freedom from defects. The finished wire shall be free from harmful defects. 5.1.4 Joints during wire manufacture. For grades350 and480, welds shall be permitted at the
17、option of the manufacturer at any stage prior to galvanizing. For all other grades there shall be no welds in the wire other than those made in the base rod or wire before drawing. 5.2 Strand lay 5.2.1 The outer wire of all strand shall have a right-hand lay unless otherwise specified by the purchas
18、er. In 19-wire strand the outer twelve wires shall be normally laid up in reverse direction to that of the inner layer, but they may be laid-up in the same direction if agreed between manufacturer and purchaser. 5.2.2 General strand. The lay length of general strand shall be12 to18 times the nominal
19、 overall diameter of the strand. 5.2.3 Railway signalling strand. The lay length of railway signalling strand shall be15to18times the nominal overall diameter of the strand.BS183:1972 2 BSI 01-2000 5.3 Joints during stranding 5.3.1 For grades350 and480 no joints shall be made during stranding if the
20、re are less than5 wires in the strand. 5.3.2 For grades350 and480 if there are5 or7 wires in the strand and for grades700 to1300 if there are7 wires in the strand, joints shall be permitted in the individual wires during stranding, but these stranding joints shall be not less than15m apart in the fi
21、nished strand. 5.3.3 For all grades of19-wire strand, joints in the wire during stranding shall be permitted provided they are kept to a minimum and well spaced. 5.3.4 Joints made during stranding shall be protected against corrosion. NOTEThe normal lengths of strand which can be supplied without st
22、randing joints in the individual wires are given inAppendix A. 6 Inspection and testing Selection of test pieces and all tests shall be carried out in accordance with Clauses7, 8, 9, 10 and 11, at the manufacturers works or if agreed between the purchaser and the manufacturer, in accordance with BS6
23、001. NOTEAttention is drawn to BS6000, “Guide to the use of BS6001, “Sampling procedures and tables for inspection by attributes”. 7 Selection of test pieces 7.1 Care shall be taken to ensure that test pieces are not damaged, either before removing or during removal from the coil. 7.2 General strand
24、. One test piece shall be taken from each coil or drum of strand. Where split lengths are supplied test results on the original coils shall apply. 7.3 Railway signalling strand. The coils shall be arranged in separate batches, each batch consisting of20coils or1000kg, whichever is the greater mass.
25、From each batch, one coil shall be selected by the purchaser or his representative and a test piece taken from this coil. Each batch shall be kept separate until after the tests are made. These batches, the coil from which the test pieces are taken, and the test pieces shall be labelled for identifi
26、cation. 8 Diameter The diameter of the test piece shall be determined with a micrometer by taking two measurements at right angles to each other at three places along a length of not less than250mm, and the average of these six measurements shall be taken as being the diameter of the galvanized wire
27、. The tolerances on the diameter shall be in accordance withTable 1. Table 1 Tolerances on diameter 9 Tensile and elongation test 9.1 Method 9.1.1 The ends of the strand shall be suitably prepared by either filling in the interstices with finer wire, or other approved means, to minimise failure in t
28、he testing machine grips. The load shall be applied at a steady rate not exceeding that equivalent to100N/mm 2per second. An initial load of10% of the specified breaking load shall be applied to the test piece, at which stage the distance apart of the testing machine grips shall be approximately600m
29、m (see9.1.2). 9.1.2 For routine determination of tensile strength only, the straining rate shall be preset to give a separation of the grips not greater than40% of the test length per-minute. In cases of dispute the requirements of9.1.1 shall apply. 9.1.3 The elongation shall be determined as the pe
30、rcentage increase in separation between the grips from the position after application of the initial load to the position at the initial failure in the test piece. Elongation tests shall be made on lengths of strand which do not contain wire joints. 9.1.4 If the test piece breaks within25mm of the g
31、rips of the testing machine, and shows less than the specified elongation, the test shall be disregarded and further tests made until the break occurs more than25mm from the grips. Additional test pieces shall be taken from the same coil or drum when the previous tests are to be disregarded. 9.2 Ten
32、sile test. When tested in accordance with9.1 the minimum breaking load of the strand shall be in accordance with the requirements ofTable 3. 9.3 Elongation test When tested in accordance with9.1 the elongation of the strand in600mm shall be not less than that specified inTable 2. Diameter Tolerance
33、mm mm Finer than 0.90 1.50, 1.40, 1.25, 1.00 and 0.90 0.03 0.04 2.65, 2,.50, 2.36, 2.00, 1.80, and 1.60 3.25, 3.15 and 3.00 3.65 and thicker 0.06 0.08 0.10BS183:1972 BSI 01-2000 3 Table 2 Minimum elongation of strand 10 Wrapping test All wires removed from the test piece shall withstand being wrappe
34、d8 close turns around a mandrel of diameter equal to the nominal diameter of the individual wires when tested in accordance with BS4545. 11 Reverse bend test for railway signalling strand All wires removed from the test piece shall withstand without breaking, 15 reverse bends over a radius of5mm, wh
35、en tested in accordance with BS4545. 12 Retests 12.1 General strand. Should a test piece fail to meet any of the test requirements, two additional tests in respect of the same requirements shall be made on material taken from the same coil. If the results of both additional tests fulfil the requirem
36、ents, the coil shall be deemed to comply with this British Standard. If either of the additional tests do not meet the requirements, the coil shall be deemed not to comply with this British Standard. 12.2 Railway signalling strand. Should a test piece from the coil representing a batch fail to meet
37、any of the test requirements, the retest procedure given in12.1 shall be followed. If both retests fulfil the requirements, the batch represented by the coil shall be deemed to comply with this British Standard. If either retest fails to meet the requirements, the coil shall be deemed not to comply
38、with this British Standard and the remaining coils in the batch shall be tested for compliance with this British Standard. 13 Packing 13.1 Strand other than 19-wire strand. This strand shall be supplied uniformly wound in coils with the diameter of the eye of the coil as indicated in Table 4. Such s
39、trand may be supplied in coils of other eye diameter, or on drums, subject to agreement between the manufacturer and purchaser. Each coil shall be securely bound with four separate binders of galvanized steel wire of not less than2mm nor greater than3.75mm diameter. In no case shall coils be bound o
40、r otherwise fastened together unless specifically agreed by the purchaser. 13.2 Nineteen-wire strand. Unless otherwise agreed between the manufacturer and the purchaser19-wire strand shall be supplied on drums, the barrel diameter of which shall be not less than45 times the overall diameter of the c
41、ompleted strand. The lower tensile strength strands may be supplied on drums of smaller barrel diameter by agreement between purchaser and manufacturer. The drum shall be so designed that it will take the mass specified with a flange diameter approximately twice the width of the barrel. 13.3 Railway
42、 signalling strand. For the UK market railway signalling strand shall be packed in coils of2028kilograms, of which not more than10% shall be in coils of less than24kilograms, but strand for export may be supplied in coils of masses as specified by the purchaser, of which not less than90% shall be of
43、 a specified mass and not more than10% above or below this mass. If no masses are specified the mass of each coil shall be between38kilograms and50kilograms. 13.4 Labelling. Each coil or drum shall carry a metal or other approved label marked with the manufacturers name, the designation of the stran
44、d, and the net mass to the nearest half kilogram. In the case of railway signalling strand the label shall also carry the year of supply. 13.5 Wrapping. All coils of strand, other than railway signalling strand, shall be wrapped in hessian and packed and delivered as ordered. Railway signalling stra
45、nd is normally supplied unwrapped in the UK, but if required for export purposes, hessian or other wrapping is required, for single coils and/or bundles. A suitable label giving the gross mass of the coil or bundle and the mass of the packing, shall be attached after packing. 14 Oiling Coils shall be dipped in an oil or other protective compound agreed between the manufacturer and the purchaser if specified by the purchaser on his enquiry or order. Grade Minimum elongation in 600 mm % 350 12 480 12 700 8 850 6 1 000 6 1 150 4 1 300 4
