CHAIN GENERAL
Although chain is generally heavier than other lifting equipment it is more durable, can withstand rough handling, can be stored without serious deterioration and has a longer effective life than most other mediums. Various types of chain are in use today and an important part of an operator's knowledge is to be able to recognise those chains that can be used for lifting purposes and those that can not. Chain identified by "8 - 80 - 800 - T - are approved for lifting assemblies. GRADES CHAIN & FITTINGS THREE AUSTRALIAN STANDARDS COVER CHAIN MANUFACTURE AND ASSEMBLY AS2321 Short Link Chain for Lifting Purposes (Non-Calibrated)** AS3775.1 Chain slings for lifting purposes - Grade T(80) and V(100) AS3776 Lifting Components for Grade T(80) and V(100) chain slings AS2321 is a performance standard, it is concerned with the production and testing of chain rather than it’s usage. AS 2321 COVERS GRADES OF QUALITY AS FOLLOWS: • L or 3 (30) - Low Tensile • P or 5 (50) - Higher Tensile • T or 8 (80) - Alloy **NON-CALIBRATED Non calibrated Load Chain is used for slings. This chain is manufactured to specific link dimensions, tolerance and mechanical properties but not dimensional accuracy. Whereas the chain required by hoists (or to run over gypsy or a pocketed wheel) is calibrated load chain and every link needs to be dimensionally exact. GRADE 100 Lifting Chain and Components GRADE 60 Stainless Steel Lifting
4 | BUNZL SAFETY | SAFETY PRODUCTS CATALOGUE VOL1 3
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