ISO 7597:2013

INTERNATIONAL ISO
STANDARD 7597
Second edition
2013-04-01
Forged steel lifting hooks with latch,
grade 8
Crochets de levage forgés en acier avec loquet, classe 8
Reference number
ISO 7597:2013(E)
©
ISO 2013

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ISO 7597:2013(E)

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© ISO 2013
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ii © ISO 2013 – All rights reserved

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ISO 7597:2013(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms 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 Verification of safety requirements . 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 Manufacturer’s declaration . 7
8 Instructions for use . 7
Annex A (informative) Bases for the calculation of hook dimensions. 8
Annex B (informative) Designation system for hooks — Grade 8 . 9
Bibliography .10
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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 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, also take part in the 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 different 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 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 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.
This second edition cancels and replaces the first edition (ISO 7597:1987), which has been technically revised.
iv © ISO 2013 – All rights reserved

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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 applications. In such instances, it is important that the hook design is checked
to ensure its fitness for the intended use.
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INTERNATIONAL STANDARD ISO 7597:2013(E)
Forged steel lifting hooks with latch, grade 8
1 Scope
This International Standard specifies requirements for forged steel lifting hooks with latch 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 International 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 referen
...