Use in Adverse Environments
Temperatureaffects on working load limit (WLL)
Account should be taken to the maximum temperature that can be reached by the chain sling in service. This is difficult in practice but underestimation of the temperature should be avoided. The table below summarises the necessary de-rated working load limit due to temperature.
Chain slings in grade 8 and 10 will not be negatively affected by temperatures down to -40 °C which result in the fact that no reduction of the working load limit are needed. When chain slings are to be used in temperatures below -40 °C CERTEX should be consulted.
The use of a chain sling in grade 8 and 10 within the permissible temperatures ranges given in the table does not require any permanent reduction in working load limit. Working load limit are valid again when the chain sling is used in normal temperature again. If the chain sling reach temperatures that highly exceed the maximal allowed according to the table it should be discard or be returned to CERTEX for measure.
|Allowed load expressed in % of working load limit (WLL)|
|temperature (t) Cº|
|-40 - 200||201 - 300||301 - 400||401 - 475|
|100||Not allowed||Not allowed||Not allowed|
Chain slings in grade 8 and 10 should not be used either immersed in acidic solutions or exposed to acid fumes.
Chain slings should, for the same reason, not be warm-galvanized or exposed to electroytic finish without permisson from CERTEX.
CERTEX should be consulted in case the slings is to be exposed to chemicals combined with high temperature.