What is ISO 4778 - Chain slings of welded construction about ?
ISO 4778 specifies the requirements, methods of rating and testing of single, double, three and four legs 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. The range of nominal diameter, dn, covered by ISO 4778 is from 4 mm to 45 mm. Chain slings according to ISO 4778 are for use in the temperature range –40 °C to +400 °C according to ISO 3056.
Chain slings according to ISO 4778 comply with the general conditions of acceptance of ISO 1834 and are used for symmetrically distributed loads only. ISO 4778 does not apply to mechanically joined chain slings.
Note 1: For special lifting purposes not covered by ISO 4778, additionally intermediate links can be used, for example, to connect components to each other having different working load limits.
Note 2: Concerning the use and maintenance of chain slings of grade 8, see ISO 3056.
Note 3: For rating of chain slings with asymmetrically distributed loads, see ISO 3056.
Note 4: For mechanically joined chain slings, see ISO 7593.
Who is ISO 4778 - Chain slings of welded construction for ?
ISO 4778 on chain slings of welded construction is useful for:
- Crane equipment manufacturers
- Safety regulatory organizations
- Crane operators
- Crane service personnel’s
- Quality control personnel
- Inspection personnel
Why should you use ISO 4778 - Chain slings of welded construction ?
Chain slings are one of the most durable riggings out there. They are used in crane rigging for lifting loads, in heavy goods transport to tie down the loads, and in industries like power, manufacturing, mining, and petroleum, among others. chain sling inspection testing can help prevent industry compliance issues, keep the workers safe, and extend the life of the lifting equipment. ISO 4778 provides you with the requirements for the manufacturers for welding, heating, and testing chain slings.
ISO 4778 provides you with information about the components of chain slings like hooks, chain legs, master links, intermediate master links, joining links, end links, and other forged components. ISO 4778 provides you guidance on working load limit (WLL) and provides you with mechanical requirements.
ISO 4778 provides you with the marking information for the single leg, double leg, and three & four leg chain slings. All chain slings should conform to the manufactures certificate provided in ISO 4778. ISO 4778 helps you to manufacture high-quality chain slings of welded construction.
