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Standards Development
This document specifies the requirements for medium tolerance sling chains of grade 10G for the use primarily in chain slings, assuming a nominal stress of 1 000 N/mm2 related to the cross-sectional area of both legs for the respective nominal diameter at the specified minimum breaking force. The range for the nominal diameter extends from 4 to 32 mm. Sling chains according to this document are electrically welded, round steel short link chains with a nominal pitch pn = 3 × dn, heat treated and tested. Permissible welding processes are flash welding, resistance butt welding and friction welding. These sling chains are designed for use in a temperature range from -30 °C to +200 °C. For guidance on temperatures below -30 °C the manufacturer should be consulted. The sling chains are generally surface painted by the manufacturer for easy identification and corrosion protection. At the customer's request, the surface condition is non-coated. Both characterise the finished condition.
This proposal defines technical requirements for medium-tolerance grade 10G sling chains intended mainly for use in chain slings. The document ensures uniform mechanical performance and safety by specifying a nominal stress at the defined minimum breaking force for nominal diameters from 4 mm to 32 mm. The sling chains are round steel short-link chains, electrically welded using established welding processes, heat treated, and tested to achieve consistent quality. The specified design, manufacturing methods, and testing requirements support reliable performance under typical lifting conditions. The proposal also defines the applicable temperature range and addresses surface conditions for identification and corrosion protection. Overall, the document provides a clear and harmonised technical basis for the manufacture and use of grade 10G sling chains in lifting applications.
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