1、 ISO 2013 Forged steel lifting hooks with latch, grade 8 Crochets de levage forgs en acier avec loquet, classe 8 INTERNATIONAL STANDARD ISO 7597 Second edition 2013-04-01 Reference number ISO 7597:2013(E) ISO 7597:2013(E)ii ISO 2013 All rights reserved COPYRIGHT PROTECTED DOCUMENT ISO 2013 All right
2、s reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from eit
3、her ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ISO 7597:2013(E) ISO 2013 All rights reserved iii Con
4、tents Page Foreword iv Introduction v 1 Scope . 1 2 Normative references 1 3 T erms and definitions . 1 4 Safety requirements . 1 4.1 Design . 1 4.2 Dimensions . 2 4.3 Materials and heat treatment . 4 4.4 Manufacturing methods and workmanship 4 4.5 Mechanical properties 4 4.6 Hook latches 5 5 V erif
5、ication of safety r equir ements 6 5.1 Qualification of personnel . 6 5.2 Type tests . 6 5.3 Manufacturing test regime and acceptance criteria . 6 5.4 Hook latches 6 6 Marking 6 7 Manufacturers declaration . 7 8 Instructions for use . 7 Annex A (informative) Bases for the calculation of hook dimensi
6、ons. 8 Annex B (informative) Designation system for hooks Grade 8 9 Bibliography .10 ISO 7597:2013(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normall
7、y 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, also take part in the
8、work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the d
9、ifferent approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2. www.iso.org/directives Attention is drawn to the possibility that some of the elements of this document may
10、be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received. www.iso.org/patents Any
11、 trade name used in this document is information given for the convenience of users and does not constitute an endorsement. The committee responsible for this document is ISO/TC 111, Round steel link chains, chain slings, components and accessories, Subcommittee SC 3, Components and accessories. Thi
12、s second edition cancels and replaces the first edition ( ISO 7597:1987), which has been technically revised.iv ISO 2013 All rights reserved ISO 7597:2013(E) Introduction The hooks covered by this International Standard are normally supplied to be part of a sling, but they can also be used for other
13、 applications. In such instances, it is important that the hook design is checked to ensure its fitness for the intended use. ISO 2013 All rights reserved v Forged steel lifting hooks with latch, grade 8 1 Scope This International Standard specifies requirements for forged steel lifting hooks with l
14、atch of grade 8 having eye or clevis and pin up to 63 t working load limit (WLL), mainly: for use in chain slings according to ISO 4778 and ISO 7593; for use in steel wire rope slings according to ISO 7531; for use in textile slings; intended for lifting objects, materials or goods. This Internation
15、al Standard does not apply to hand forged hooks. Annex A gives the bases for calculation of hook dimensions. Annex B gives an example of a designation system for hooks of grade 8. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are
16、 indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 8539:2009, Forged steel lifting components for use with Grade 8 chain 3 T erms a nd definiti ons For
17、 the purposes of this document, the terms and definitions given in ISO 8539 apply. 4 Safety requirements 4.1 Design The articulation and relative movement shall be in accordance with 4.1 of ISO 8539:2009. NOTE The form of the hook is not specified in detail. For example, a minimum value of dimension
18、 F (see Figure 1) as measured in any direction is specified so that the eye of the hook can accommodate a pin, but the eye of the hook need not be circular. The form of the upper end shall be either of the eye type or the clevis type as designated in Table 1 and Figure 1. Each hook shall have a spri
19、ng-loaded latch conforming to 4.6 to ensure that the load cannot become accidentally unhooked. INTERNATIONAL ST ANDARD ISO 7597:2013(E) ISO 2013 All rights reserved 1 ISO 7597:2013(E) Table 1 Forms of hook Form Description Principal use E Eye type Chain slings, wire rope slings and textile slings C
20、Clevis type Mechanically assembled chain slings 4.2 Dimensions The principal dimensions of the hooks shall conform to Table 2, in which the hook dimensions are related to the working load limit. NOTE To meet the articulation and relative movement requirement when directly connected in wire rope slin
21、gs and textile slings, dimension F will need to be larger than the minimum value given in Table 2. In addition, the following requirements shall be met: a) the actual point height, B, shall be equal to or greater than the full throat opening O (see Figure 1); b) the full throat opening, O, shall not
22、 exceed 95 % of the actual seat diameter D; c) the hook latch shall be capable of closing over the maximum diameter of bar (figure footnote a), as indicated in Figure 1, that can be admitted through the actual throat opening O 1 .2 ISO 2013 All rights reserved ISO 7597:2013(E) O O B D a F L H 2 1 1
23、Key 1 clevis type 2 eye type a Maximum diameter of bar. Figure 1 Dimensions of hooks ISO 2013 All rights reserved 3 ISO 7597:2013(E) Table 2 Dimensions of hooks (see Figure 1) Code number Working load limit (WLL) t D min. mm O min. mm O 1min. mm F min. mm H max. mm L max. mm 3 0,25 11 8 8 6 12 8 4 0
24、,5 15 11 11 8 17 11 5 0,8 19 14 14 10 21 14 6 1,12 22 17 16 12 25 17 7 1,5 26 20 18 14 29 20 8 2 30 23 21 16 34 23 9 2,5 34 26 24 18 38 26 10 3,15 38 29 27 20 43 29 11 3,75 42 32 30 23 48 32 13 5,3 49 37 35 26 55 37 14 6 52 40 37 28 59 40 16 8 60 46 43 32 68 46 18 10 67 51 48 36 76 51 19 11,2 71 54
25、51 38 80 54 20 12,5 75 57 53 40 85 57 22 15 82 63 58 44 93 63 23 16 85 65 60 46 96 65 25 20 95 72 68 51 107 72 26 21,2 98 75 70 52 111 75 28 25 106 81 76 57 120 81 32 31,5 119 91 85 64 135 91 36 40 134 102 96 72 152 102 40 50 150 115 107 81 170 115 45 63 168 129 120 90 190 129 4.3 Materials and heat
26、 treatment Materials and heat treatment shall be in accordance with 4.2 and 4.3 of ISO 8539:2009. 4.4 Manufacturing methods and workmanship Manufacturing methods and workmanship shall in accordance with 4.4 of ISO 8539:2009. 4.5 Mechanical properties The mechanical properties shall conform to 4.5 of
27、 ISO 8539:2009.4 ISO 2013 All rights reserved ISO 7597:2013(E) 4.6 Hook latches The latch shall engage in the point of the hook to form a complete closure of mating surfaces. With the hook in any orientation, the spring shall ensure that the latch is held positively in the closed position. Latches o
28、perated solely by gravity shall not be used. The force required to fully open the latch should not exceed that which can be applied manually. NOTE Table 3 contains guidance on the minimum initial torque and maximum torque during latch opening necessary to fulfil these requirements, whilst ensuring t
29、hat the force required to fully open the latch does not exceed that which can be applied manually. Table 3 Torque values for latches Guidance Code number Minimum initial torque Nm Maximum torque during opening Nm from up to and includ- ing 3 5 0,05 0,1 6 7 0,1 0,2 8 10 0,2 0,4 11 14 0,3 0,6 16 18 0,
30、75 1,5 19 23 1 2 25 28 2 4 32 45 3,5 7 The spring shall be constructed from corrosion protected material and shall be able to withstand at least 10 000 complete openings of the latch without fracture. The latch shall be able to withstand force F 1 , applied across the width of the latch, equidistant
31、 between the point of the hook and the centre of rotation of the latch, and force, F 2 , which shall be applied across the thickness of the latch laterally to F 1(see Figure 2). Both F 1and F 2shall be equivalent to 300 kg or 10 % of the working load limit of the hook, whichever is the greater, but
32、F 2shall not exceed 20 kN. ISO 2013 All rights reserved 5 ISO 7597:2013(E) = F 1 F 2 = = = Figure 2 Application of forces for type testing of the latch 5 V erifica tion of safe ty r equir ements 5.1 Qualification of pe rsonnel All testing and examination shall be carried out by a competent person. 5
33、.2 Type tests Type tests and acceptance criteria shall be in accordance with 5.2 of ISO 8539:2009. In the tests specified in 5.2.3 to 5.2.5 of ISO 8539:2009, the force shall be applied to the hook axially, without shock, using a test fixture of diameter not greater than 60 % of the seat diameter, D,
34、 of the hook. 5.3 Manufacturing test regime and acceptance criteria The manufacturing test regime and acceptance criteria shall be in accordance with 5.5 of ISO 8539:2009. 5.4 Hook latches A type test (see 5.2 of ISO 8539:2009) to verify conformity to 4.6 shall be carried out on three sample latches
35、 for each size of hook. The test shall be carried out with the latches in situ or in a test fixture that accurately simulates the location of the latch and hook point. Forces F 1and F 2shall be separately applied as indicated in Figure 2. The latch shall show no permanent deformation following remov
36、al of the forces. If any of the three samples fails the test, the latch of the size submitted for type testing shall be deemed not to conform to this International Standard. 6 Marking Marking shall be in accordance with Clause 6 of ISO 8539:2009.6 ISO 2013 All rights reserved ISO 7597:2013(E) 7 Manu
37、facturers declaration The manufacturers declaration shall conform to Clause 7 of ISO 8539:2009. 8 Instructions for use The manufacturer shall provide specific instructions for use. The instructions for use shall accompany the hooks and shall advise on how to assemble and disassemble hooks, and how t
38、o ensure the correct fit of any pin. ISO 2013 All rights reserved 7 ISO 7597:2013(E) Annex A (informative) Bases for the calculation of hook dimensions The dimensions given in Table 2 are derived from the following formulae: D (A.1) O (A.2) O (A.3) F (A.4) H (A.5) L (A.6) where WLL is the working lo
39、ad limit. The dimensions (in millimetres) are calculated using the WLL given in Table 2 and rounded to the nearest whole number.8 ISO 2013 All rights reserved ISO 7597:2013(E) Annex B (informative) Designation system for hooks Grade 8 B.1 Designation Designation of hooks should be in accordance with
40、 the general format given in B.2. The denomination of a hook should be determined by the manufacturer. B.2 General format - - ISO 7597 - 8 -E 18 Quantity Denomination ISO Number block Grade number Form letter (see Table 1) Code number (see Table 2) ISO 2013 All rights reserved 9 ISO 7597:2013(E) Bib
41、liography 1 ISO 4778, Chain slings of welded construction Grades M (4), S (6) and T (8) 2 ISO 7531, Wire rope slings for general purposes Characteristics and specifications 3 ISO 7593, Chain slings assembled by methods other than welding Grade T(8)10 ISO 2013 All rights reserved ISO 7597:2013(E) ISO 2013 All rights reserved IC S 53.020.30 Price based on 10 pages
