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1、BRITISH STANDARD BS 7166:1989 Specification for Wedge and socket anchorages for wire ropes UDC 62 219.521.2:62 231.32:621.87.876:624.078.7:677.072.68:001.4:620.1:006.3/.8:614.8 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 12:59:37 GMT+00:00 2006, Uncontrolled
2、 Copy, (c) BSI BS 7166:1989 This British Standard, having been prepared under the direction of the Mechanical Handling Standards Policy Committee, was published under the authority of the Board of BSI and comes into effect on 31 May 1989 BSI 06-1999 The following BSI references relate to the work on
3、 this standard: Committee reference MHE/1 Draft for comment 87/76630 DC ISBN 0 580 17231 7 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Mechanical Handling Standards Policy Committee (MHE/-) to Technical Committee MHE/1, upon which th
4、e following bodies were represented: Associated Offices Technical Committee British Chain Manufacturers Association British Forging Industry Association British Ports Association and the National Association of Ports Employers British Railways Board British Steel Industry Chain Testers Association o
5、f Great Britain Corporation of Trinity House Department of Trade and Industry (National Physical Laboratory) Federation of Wire Rope Manufacturers of Great Britain Health and Safety Executive Lloyds Register of Shipping Ministry of Defence The following bodies were also represented in the drafting o
6、f the standard, through subcommittees and panels: Association of Supervisory and Executive Engineers British Coal Drop Forging Research Association Electricity Supply Industry in England and Wales Engineering Equipment and Materials Users Association Federation of Manufacturers of Construction Equip
7、ment and Cranes Independent Engineering Insurers Committee National Association of Lift Makers Steel Castings Research and Trade Association Amendments issued since publication Amd. No.Date of issueComments Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 12:59:3
8、7 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7166:1989 BSI 06-1999i Contents Page Committees responsibleInside front cover Foreword ii 1Scope1 2Definitions1 3Designation and information to be supplied1 4Constructional details1 5Workmanship2 6Type tests2 7Proof tests on socket bodies3 8Marking3 9M
9、anufacturers certificate3 Appendix A Pulsatory fatigue test4 Appendix B Storage of socket bodies and wedges4 Appendix C Information on the correct method of selection and fitting4 Appendix D Method of assembly4 Appendix E Inspection in use5 Figure 1 Typical wedge and socket anchorage components: soc
10、ket body and wedge2 Figure 2 Wire rope in line with pinholes (point of attachment)4 Figure 3 Two methods of dealing with the tail-end of the wire rope6 Publications referred toInside back cover Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 12:59:37 GMT+00:00 2
11、006, Uncontrolled Copy, (c) BSI BS 7166:1989 ii BSI 06-1999 Foreword This British Standard has been prepared under the direction of the Mechanical Handling Standards Policy Committee. It covers requirements for wedge and socket anchorages which are among the simplest devices for the termination of w
12、ire ropes. Such anchorages consist of a flat, pear-shaped wedge which fits into a suitably tapered socket or body (see Figure 1). The wedge has a peripheral groove to take a wire rope and the socket is often of the clevis type with an eye and pin fitting. Wedge and socket anchorages are intended for
13、 on-site attachment and can be used as a quick means of replacing and re-reeving wire ropes on cranes, excavators, lifts, etc. This standard specifies type tests on the socket body and on the wedge and socket anchorage assembly. A proof test on each socket body is also required. In service, the perf
14、ormance of an assembly will depend upon the design of the wedge and socket anchorage and on the type and construction of the actual wire rope used. The in-service termination efficiency may therefore be less than the type performance. Where considered necessary, suitable additional testing should be
15、 carried out to establish the termination efficiency; attention is drawn to the testing requirements of Section 6(1)(b) of the Health and Safety at Work, etc. Act 1974. Accidents involving wedge and socket anchorages are possible from causes such as the use of incompatible (mismatched) components an
16、d assembly where the wedge has not been properly and firmly seated in the body. Purchasers ordering wedge and socket anchorages for wire ropes to BS 7166 are advised to specify in their purchasing contract that the manufacturer operates a quality system in compliance with the appropriate Part of BS
17、5750, or suitable equivalent, to ensure for themselves that products claimed to comply with BS 7166 consistently achieve the required level of quality. Appendix B, Appendix C, Appendix D and Appendix E give guidance on storage of components, method of selection and fitting, method of assembly and in
18、spection in use respectively. 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
19、pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 6, 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 cov
20、er. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 12:59:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7166:1989 BSI 06-19991 1 Scope This standard specifies the performance requirements for wedge and socket anchorages designed for use as terminal attachment
21、s with either one size or two adjacent nominal sizes of steel cored or fibre cored wire rope of tensile grade up to and including 1 960 N/mm2 in the nominal diameter range of 8 mm to 96 mm. This standard also applies to wedge and socket anchorages that are incorporated into the structure of a liftin
22、g appliance, e.g. a wire rope hoist block. NOTE 1Wedge and socket anchorages are not intended for use in the make-up of lifting slings for multi-purposes as defined in BS 6166-1. NOTE 2Steel ropes with independent wire rope core (IWRC) in the tensile strength range 1 960 N/mm2 to 2 200 N/mm2, which
23、are outside the range specified in BS 302-1 to BS 302-8 inclusive, are used with wedge and socket anchorage terminations. Such anchorages are acceptable, provided they are tested with such ropes and comply with all the performance requirements of this standard. NOTE 3The titles of the publications r
24、eferred to in this standard are listed on the inside back cover. 2 Definitions For the purposes of this British Standard, the following definitions apply. 2.1 socket body a component having an internal tapered orifice in the form shown in Figure 1 suitable for housing a wedge (see 2.2) and the rope(
25、s) with which it is associated NOTEThe socket body is usually of the clevis type with eyes to accommodate a pin. 2.2 wedge a flat pear-shaped component as shown in Figure 1 having a peripheral groove suitable for fitting into a tapered socket body (see 2.1) to house a rope of matching nominal diamet
26、er 2.3 eyes bosses on the lugs of the socket body having co-axial pinholes through which a pin can pass (see 2.4) 2.4 pin a cylindrical bar to be fitted through the eyes in the lugs of the socket body arranged so as to be secure when in position but which can be readily disassembled 2.5 wedge and so
27、cket anchorage a component used as a terminal attachment for wire rope, comprising a socket body and matching wedge usually for on-site attachment and for quick rope replacement purposes 2.6 proof test force the force applied to a socket body in a static tensile test (see 7.1) 2.7 basic design size
28、the diameter of the largest wire rope with which the wedge and socket anchorage is designed to be used 2.8 competent person a designated person qualified by knowledge and practical experience which would enable the testing and examination of wedge and socket anchorages as specified in 7.2 and E.4 to
29、 be carried out and any defect to be located and evaluated in terms of possible detrimental effect 3 Designation and information to be supplied 3.1 A designation of a wedge and socket anchorage shall include the following: a) the number of this British Standard, i.e. BS 7166; b) the letters WSA; c)
30、basic design size; d) the minimum breaking load of the strongest rope for which the wedge and socket anchorage is designed (in tonnes). Example of designation: BS 7166, WSA, 16, 16.4 t. 3.2 The designation forms the minimum information to be supplied by the purchaser on his enquiry and/or order. 4 C
31、onstructional details 4.1 Socket body If the form of the socket body is asymmetric as shown in Figure 1(a), it shall be arranged so that the axis of the live or loaded side of the rope aligns with the centre of the pinholes in the lugs. If the form of the socket body is symmetric as shown in Figure
32、1(b) it shall be used on lift applications only. 4.2 Wedge The wedge shall be flat and shall have a peripheral groove which shall be of radius profile to suit the size of wire rope(s) for which it is designed see Figure 1(a). The wedge shall be of sufficient size to prevent it from passing right thr
33、ough the socket body, even when no rope is fitted. NOTEIt is recommended in Appendix B that a small hole be drilled in the wedge to enable it to be wired to the socket body for storage purposes. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 12:59:37 GMT+00:00
34、2006, Uncontrolled Copy, (c) BSI BS 7166:1989 2 BSI 06-1999 5 Workmanship 5.1 Socket body 5.1.1 General. The surfaces of socket bodies shall be clean and sharp edges shall be radiused. All flashes or fins produced in any casting process, if used, shall be removed. NOTE 1Surface defects may be remove
35、d by grinding, provided that the wall thicknesses are not reduced below the minimum wall thickness specified by the manufacturer. NOTE 2Other minor casting defects caused by the manufacturing processes where these are used may be rectified by removal and subsequent welding, provided that the thickne
36、ss of sound material remaining at the effective point immediately before welding is at least 50 % of the original thickness. The method of repair should comply with the rectification of steel castings as specified in BS 4570. 5.1.2 Pinholes. The pinholes in the lugs of the socket body where provided
37、 shall be machined in one operation and the centre line of the holes shall be at right angles to the centre line of the socket body. 5.2 Wedge The surfaces of the wedge shall be in a clean condition and sharp edges shall be radiused. The surface of the peripheral radiused groove shall be smooth. 6 T
38、ype tests 6.1 Socket body 6.1.1 Purpose of tests. The purpose of type tests is to prove the design, material and method of manufacture of the socket body. NOTETests to prove complete wedge and socket anchorage assemblies with the associated wire rope are given in 6.2. 6.1.2 Tensile test 6.1.2.1 Gene
39、ral. Two tensile tests shall be carried out on each size of socket body of each design, material and method of manufacture. 6.1.2.2 Force applied and requirement. A force equal to 50 % of the minimum specified breaking load of the strongest rope for which the socket body is designed shall be applied
40、 and held for 2 min. On removing this force, the socket body shall be deemed to have satisfied the test requirement if, compared with their initial values, both the following apply: a) the increase in the diameter of the pinholes in the lugs when measured in any position does not exceed 0.2 % or 0.1
41、 mm, whichever is the greater; Figure 1 Typical wedge and socket anchorage components: socket body and wedge Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 12:59:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7166:1989 BSI 06-19993 b) the increase in dimensio
42、n W see Figure 1(a) at the base of the socket body does not exceed 0.2 % or 0.1 mm, whichever is the greater. 6.2 Wedge and socket anchorage assemblies 6.2.1 Purpose of tests. The purpose of type tests is to assess the suitability of each design, material and method of manufacture of wedge and socke
43、t anchorage assembly including the socket body, wedge and associated wire rope for which the anchorage was designed. If zinc coated wire ropes are to be used in a termination application, then the same type and finish of wire rope shall be used in the type tests. NOTEThis test may be carried out con
44、currently with that specified in 6.1 for socket bodies. 6.2.2 Tensile test 6.2.2.1 General. Two tensile tests shall be carried out on each size of wedge and socket anchorage of each design, material and method of manufacture and for each nominal diameter of rope, d. When the sockets are tested in pa
45、irs, the distance between the inner faces of the sockets shall be at least 30d. 6.2.2.2 Force applied and requirement. A force equal to 80 % of the minimum specified breaking load of the strongest rope of each nominal diameter for which the wedge and socket anchorage is designed shall be applied. Th
46、e force shall be applied quickly up to 60 % of the same minimum specified breaking load but increased slowly until the 80 % value has been reached. The force shall be held for 2 min. On removing the force the wedge and socket anchorage shall be deemed to have satisfied this test provided the load is
47、 retained. Both wedge and socket anchorages shall pass the tests. 6.2.3 Pulsatory fatigue test. When a wedge and socket anchorage is to be subjected to fluctuating stress in service over an extended period, e.g. in a lift installation, the purchaser may require evidence that an additional prototype
48、pulsatory fatigue test has been successfully carried out. This requirement, when necessary, is to be stated in the enquiry and/or order. In such cases the test shall be carried out in accordance with A.1 to A.4 inclusive, and the anchorage shall comply with the requirement in A.5. 7 Proof tests on s
49、ocket bodies 7.1 Proof test force Each socket body shall be subjected to a proof force equivalent to 40 % of the minimum specified breaking load of the strongest rope for which the wedge and socket anchorage is designed. 7.2 Requirement After removal of the proof load, each socket body shall be carefully examined by a competent person and shall be deemed to comply with the standard only if found free from visible flaw or defect. 8 Marking 8.1 Basic design size Each socket body and wedge shall be legibly and permanently marked with the basic design size. NOTEThe
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