ISO 4778:2019
(Main)Round steel short link chains for lifting purposes — Chain slings of welded construction — Grade 8
Round steel short link chains for lifting purposes — Chain slings of welded construction — Grade 8
This document specifies the requirements, methods of rating and testing of single, double, three and four leg welded chain slings of grade 8 using components such as sling chains according to ISO 3076 together with links according to ISO 16798, hooks according to ISO 7597 and forged components according to ISO 8539. NOTE 1 For special lifting purposes not covered by this document, additionally intermediate links can be used, for example to connect components to each other having different working load limit. The range of nominal diameter, dn, covered by this document is from 4 mm to 45 mm. Chain slings according to this document are for use in the temperature range ?40 °C to +400 °C according to ISO 3056. NOTE 2 Concerning the use and maintenance of chain slings of grade 8, see ISO 3056. Chain slings according to this document comply with the general conditions of acceptance of ISO 1834 and are used for symmetrically distributed loads only. NOTE 3 For rating of chain slings with asymmetrically distributed loads, see ISO 3056. This document does not apply to mechanically joined chain slings. NOTE 4 For mechanically joined chain slings, see ISO 7593.
Chaînes de levage en acier de section ronde à maillons courts — Elingues en chaînes assemblées par soudure — Classe de qualité 8
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Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 4778
Second edition
2019-06
Round steel short link chains for
lifting purposes — Chain slings of
welded construction — Grade 8
Chaînes de levage en acier de section ronde à maillons courts —
Elingues en chaînes assemblées par soudure — Classe de qualité 8
Reference number
ISO 4778:2019(E)
©
ISO 2019
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ISO 4778:2019(E)
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ii © ISO 2019 – All rights reserved
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ISO 4778:2019(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Requirements . 3
4.1 Chain sling . 3
4.2 Components . 4
4.2.1 Chain legs . 4
4.2.2 Master links . 4
4.2.3 Intermediate master links, joining links and end links . 4
4.2.4 Hooks . 5
4.2.5 Other forged components . 5
4.3 Working load limit (WLL) . 5
4.4 Mechanical requirements . 6
4.4.1 General. 6
4.4.2 Single leg chain sling. 7
4.4.3 Double leg chain sling . 8
4.4.4 Three and four leg chain sling . 9
5 Marking .10
5.1 General .
...
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