Restrictions on the Angle of Use
All multi-leg chain slings exert a horizontal component of force, which increases as the angle from the vertical becomes greater.
No chain sling should be used if the angle from the vertical exceeds 60°, as beyond this point the forces in the legs drastically increase.
DO NOT USE MULTI-LEG CHAIN SLINGS AT ANGLES WITHIN THE SHADED AREA. Angles of less than 15° should also be avoided as these can lead to the load becoming unstable.
Limitations on Use
Due to risk of embrittlement chain slings should not be used in acid or caustic solutions nor in heavily acidic or caustic laden atmospheres. In uncertain conditions consult CERTEX.
Chain slings must not be heat treated, galvanised, plated, coated or subject to any process involving heating or pickling. Each of these processes can have dangerous effects and will invalidate the manufacturers certificate.
Chain slings may be used in temperatures down to -40 o C with no reduction in the working load limit. The use of KUPLEX chain slings within the permissable temperature range in the table shown does not require any permanent reduction in working load limit when the chain sling is returned to normal temperatures. A sling accidentally exposed to temperatures in excess of the maximum permissable should be withdrawn from service immediately and returned to CERTEX for thorough examination.
When using chain slings in exceptional hazardous conditions, the degree of hazard should be asssessed by a competent person and the working load limit adjusted accordingly. Examples include the lifitng of persons and the lifting of potentially dangerous loads such as molten metals, corrosive materials or fissile material and certain offshore activities.
|Sling Temperature||Reduction in Working Load Limit|
|Grade 8||Grade 10|
|-40 0 C - 200 0 C||NONE||NONE|
|200 0 C - 300 0 C||10%||DO NOT USE|
|300 0 C - 400 0 C||25%||DO NOT USE|
|Above 400 0 C||DO NOT USE||DO NOT USE|