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1、BRITISH STANDARD BS ISO 7900:2006 Steel wire and wire products for fences Zinc- and zinc-alloy-coated steel barbed wire ICS 77.140.65; 91.090 ? Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 10:07:44 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BS ISO 7900:2006 T
2、his British Standard was published under the authority of the Standards Policy and Strategy Committee on 28 February 2007 BSI 2007 ISBN 978 0 580 50171 5 National foreword This British Standard was published by BSI. It is the UK implementation of ISO 7900:2006. The UK participation in its preparatio
3、n was entrusted to Technical Committee ISE/26, Steel wire. A list of organizations represented on ISE/26 can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance
4、 with a British Standard cannot confer immunity from legal obligations. Amendments issued since publication Amd. No. DateComments Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 10:07:44 GMT+00:00 2007, Uncontrolled Copy, (c) BSI INTERNATIONAL STANDARD ISO 7900
5、Second edition 2006-06-01 Reference number ISO 7900:2006(E) Steel wire and wire products for fences Zinc- and zinc-alloy-coated steel barbed wire Fils et produits trfils en acier pour cltures Ronces en acier revtu de zinc ou dalliages de zinc BS ISO 7900:2006 Licensed Copy: London South Bank Univers
6、ity, London South Bank University, Thu Mar 01 10:07:44 GMT+00:00 2007, Uncontrolled Copy, (c) BSI ii Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 10:07:44 GMT+00:00 2007, Uncontrolled Copy, (c) BSI iii Contents Page 1Scope 1 2Normative references 1 3Informati
7、on to be supplied by the purchaser 1 4Manufacture . 2 5Requirements . 3 6Sampling and testing 3 7Inspection and documentation . 4 8Methods of test 4 9Packaging . 4 Annex A (informative) Typical barbed-wire formation (other types of barbed wire may be available) . 5 BS ISO 7900:2006 Licensed Copy: Lo
8、ndon South Bank University, London South Bank University, Thu Mar 01 10:07:44 GMT+00:00 2007, Uncontrolled Copy, (c) BSI iv Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing Internationa
9、l Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO,
10、also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical commi
11、ttees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the po
12、ssibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 7900 was prepared by Technical Committee ISO/TC 17, Steel, Subcommittee SC 17, Steel wire rod and wire products. This second
13、edition cancels and replaces the first edition (ISO 7900:1988), which has been technically revised. BS ISO 7900:2006 Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 10:07:44 GMT+00:00 2007, Uncontrolled Copy, (c) BSI 1 Steel wire and wire products for fences Zin
14、c- and zinc-alloy-coated steel barbed wire 1Scope This International Standard specifies the characteristics of zinc- and zinc-alloy-coated steel barbed wire, with conventional and reverse twist consisting of two stranded line wires, around which the barbs are tightly wound, a twist being imparted be
15、tween the barbs to restrict their movement. The barbed-wire entanglement has a single line wire, around which the barbs are wound. 2Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. Fo
16、r undated references, the latest edition of the referenced document (including any amendments) applies. ISO 404, Steel and steel products General technical delivery requirements ISO 6892, Metallic materials Tensile testing at ambient temperature ISO 7989-1, Steel wire and wire products Non-ferrous m
17、etallic coatings on steel wire Part 1: General principles ISO 7989-2, Steel wire and wire products Non-ferrous metallic coatings on steel wire Part 2: Zinc or zinc- alloy coating ISO 8458-1, Steel wire for mechanical springs Part 1: General requirements ISO 10474, Steel and steel products Inspection
18、 documents 3Information to be supplied by the purchaser The following information shall be supplied by the purchaser at the time of inquiry or order: a)the number of this International Standard; b)quantity; c)type of barbed wire; d)coating type; e)barb spacing; f)length on reels; g)in the case of ba
19、rbed-wire entanglement (BWE), the type of finish; h)whether the uniformity of coating is to be measured; i)inspection documentation requirements; j)agreed quality characteristics for testing (see Clause 6). BS ISO 7900:2006 Licensed Copy: London South Bank University, London South Bank University, T
20、hu Mar 01 10:07:44 GMT+00:00 2007, Uncontrolled Copy, (c) BSI 2 4Manufacture 4.1Base metal The base metal of the barbed wire shall be of a good-commercial-quality steel wire, having the properties specified in Table 1. 4.2Fabrication 4.2.1General The wire shall be zinc coated or zinc-alloy coated in
21、 accordance with ISO 7989-2, before fabrication into barbed wire, except for barbed-wire entanglement, which may be made from bright wire and suitably finished (other than zinc coated) in its final state. 4.2.2Conventional barbed wire (C) The conventional barbed wire shall be formed from two line wi
22、res complying with 4.1 and Table 1, twisted together with an approximate lay of . Typical barb spacing is , or (or other spacing by agreement). Barb spacing shall be measured in accordance with 8.4. The barbs shall be tightly wrapped round the two stranded line wires by a method that prevents slippi
23、ng, to expose the four barbs at an angle of approximately apart, in a plane at right angles to the axis of the line wire (e.g. see Figure A.1). The barbs shall project a distance of from the centerline of the wire, and the barb ends shall be cut at an angle not greater than to the axis of the barb.
24、4.2.3Reverse-twist type (RT) The barbed wire shall be formed from two line wires complying with 4.1 and Table 1, twisted together with an approximate lay of . Typical barb spacing is , or (or other spacing by agreement). Barb spacing shall be measured in accordance with 8.4. The barbs shall be forme
25、d by tightly wrapping round the two stranded line wires, to expose the four barbs in a fixed position at an angle of approximately apart, in a plane at right angles to the axis of the line wires. The barbs shall project a distance of from the centerline of the wire, and the barb ends shall be cut at
26、 an angle not greater than to the axis of the barb. The barbed wire shall not start to unwind until of the total nominal breaking load is applied. The unwinding of the barbed wire occurs when the stranded wires no longer extend under the influence of the applied load. The wires start to unravel in s
27、uch a way that the number of twists of the wire around each other diminishes. This is Table 1 Nominal diameters, minimum tensile strengths and minimum breaking loads for barbed wire Wire typeType of barbed wire Nominal wire diameter Tolerances on diameters Minimum tensile strength of wire Minimum st
28、rand breaking loadb a LineConventional2,53503 434 Reverse twist1,709504 230 BWE3,001 2508 836 PointConventional and BWE2,00350 Reverse twist1,50350 a b The minimum strand breaking load shall be the overriding criterion. mmmmN/mm2N 0,060 0,050 0,070 0,050 0,045 1 N/mm2=1 MPa 50 mm75 mm10 mm100 mm10 m
29、m 90 12,5 mm3,5 mm 35 25 mm75 mm10 mm100 mm10 mm 90 12,5 mm3,5 mm 35 75 % BS ISO 7900:2006 Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 10:07:44 GMT+00:00 2007, Uncontrolled Copy, (c) BSI 3 noticeable in the stress/strain curve of the tensile test, where the
30、first major drop in stress occurs. The tensile test shall be performed on a sample of two barb spacings. 4.2.4Barbed-wire entanglement (BWE) 4.2.4.1The entanglement shall be formed from wire complying with 4.1 and Table 1. The single-line wire shall be crimped to an approximate pitch of and approxim
31、ate amplitude of , excluding the wire diameter. 4.2.4.2The barbed wire shall be formed from one crimped line wire, with four-point barbs spaced at intervals between centers of . The barbs shall be formed by wrapping round the line wire approximately four turns, to expose the barbs in a fixed positio
32、n at an angle of approximately apart, in a plane at right angles to the axis of the line. The barbs shall project a distance of to from the centerline of the wire, and the barb ends shall be cut at an angle not greater than to the axis of the barb. 4.2.4.3The barbed-wire entanglement shall be suppli
33、ed as a uniform cylindrical coil complying with a) or b) as follows: a)68 turns approximately in diameter, with adjacent turns clipped together in a lozenge pattern, the coil being capable of being extended to a length of . b)32 turns in diameter, clipped together in a lozenge pattern, the coil bein
34、g capable of being extended to a length of . Along the length of the coil, adjacent turns in the coil shall be fastened together with five rows of clips made from austenitic stainless steel in the softened condition, or galvanized steel. The rows of clips shall be spaced around the circumference of
35、the coils at intervals. The start and end of the coil shall also be fitted with two additional clips apart to secure the ends of the coil. The clips shall be completely closed round the two wires, but allowing sufficient movement to permit the formation of the concertina when the coil is extended, w
36、ithout the line wire being permanently deformed at the clips. If the entanglement is manufactured from bright wire, a finish should be applied, such as bitumastic (by spraying or by dipping), to provide durability during bad weather. 4.3Welding Joining of individual wires by means of an electric but
37、t weld is permitted, provided such joints are apart and are made in a workmanlike manner. The weld area shall be suitably protected against corrosion. 5Requirements Before transformation into barbed wire, the zinc- or zinc-alloy-coated wire shall be tested in accordance with ISO 7989-2, class A for
38、coating mass, adherence and, where specified, the uniformity of the coating. Where samples are taken from the fabricated barbed wire then the specified minimum coating mass shall be reduced by and, if specified, the minimum number of dips by . The nominal diameters, tolerances on diameters, minimum
39、tensile strengths and minimum breaking loads of barbed wire shall be as in Table 1. 6Sampling and testing The manufacturer shall be responsible for the control of product quality by the application of statistical methods of sampling and analysis of results or, alternatively, by sampling and testing
40、for the agreed quality characteristics at a rate of one reel in fifty. 16 mm1 mm 60 mm15 mm 90 15 mm20 mm 35 1 m 15 m 0,50 m0,1 m 6 m 7210 50 mm 10 m 5 %0,5 min BS ISO 7900:2006 Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 10:07:44 GMT+00:00 2007, Uncontrolle
41、d Copy, (c) BSI 4 7Inspection and documentation Non-specific testing and inspection documentation shall be provided in accordance with ISO 404 and ISO 10474. 8Methods of test 8.1Tensile tests Tensile tests shall be carried out in accordance with ISO 6892. 8.2Dimensions Dimensions shall be measured i
42、n accordance with ISO 8458-1. 8.3Zinc and zinc-alloy coatings Zinc and zinc-alloy coatings shall be assessed in accordance with ISO 7989-1 and ISO 7989-2. 8.4Barb spacing Barb spacing shall be measured and averaged over a sample of length at least . 9Packaging Conventional and reverse-twist barbed w
43、ire shall be supplied on reels in typical minimum lengths of , , or . NOTEOther lengths may be supplied by agreement. BWE shall be supplied in coil in bundles of fifteen. 10 m 100 m 200 m 250 m500 m BS ISO 7900:2006 Licensed Copy: London South Bank University, London South Bank University, Thu Mar 0
44、1 10:07:44 GMT+00:00 2007, Uncontrolled Copy, (c) BSI 5 Annex A (informative) Typical barbed-wire formation (other types of barbed wire may be available) a) b) Figure A.1 Conventional barbed wire BS ISO 7900:2006 Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 1
45、0:07:44 GMT+00:00 2007, Uncontrolled Copy, (c) BSI 6 Figure A.2 Reverse-twist type BS ISO 7900:2006 Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 10:07:44 GMT+00:00 2007, Uncontrolled Copy, (c) BSI blank Licensed Copy: London South Bank University, London Sout
46、h Bank University, Thu Mar 01 10:07:44 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BS ISO 7900:2006 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Euro
47、pe and at the international level. It is incorporated by Royal Charter. Revisions British Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest amendments or editions. It is the constant aim of BSI to improve the quality of our produ
48、cts and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover. Tel: +44 (0)20 8996 9000. Fax: +44 (0)20 8996 7400. B
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