Residual Risks - pewag Winner pro G12 Originalbetriebsanleitung

Subsequent surface coatings are only allowed if one can make sure that no harmful chemical reactions take place
during the process as well as after which could harm the chain's function. Hot-dip galvanising and other zinc plating
should therefore not be carried out on grade 8, 10 and 12 lifting chains. Pickling and stripping are also dangerous
processes and the suitability should be clarified.
Food, pharmaceuticals, cosmetics and chemicals: pewag lifting chains should not be used for lifting foodstuffs,
cosmetic or pharmaceutical products as well as under heavily corrosive influences (e.g. acids, chemicals, sewage).
They should not be exposed to acid or chemical vapours.
In general, pewag lifting chains should not be used for the transportation of people or used in explosion-protected
areas, neither should they be used to lift liquid metals.
Chain strands should not be entwined or knotted together.
Hooks should not bear weight on the tips.
More detailed information can be found in the specifications of the different quality grades.
E
Replacement parts to be used
Replacement parts should only be changed by qualified persons with the necessary skills. Only original pewag
replacement parts are allowed to be used; only new bolts, clamping sleeves and other safety elements should
be used.
Protective measures to be taken by the user
Gloves should be worn during fastening as well as during lifting.
When using the lifting chains in situations of implementation-related limitations, the reduction factors concerning
load capacity must be taken into account so that sufficient safety is ensured.

Residual risks

Residual risks occur primarily as a result of non-observance of the operation instructions and/or the conventional
lifting techniques; hence it is necessary that only properly trained personnel assess and implement the lifting
procedure.
Overloading caused by non-observance of the maximum load capacity or disregarding the reduced load capacity
due to temperature influence, asymmetry, edge or impact loading can also lead to the failure of the lifting chains as
well as using the wrong replacement parts, exceeding the angle of inclination, strong vibrations/oscillations caused
by overloading or the use of untested and/or twisted or knotted chains. This can lead to the failure of the lifting chain
that further leads to the load falling and injuring personnel present in the danger zone of the hoisting device.
Lifting a rigid load with a four-strand lifting chain means that most of the weight is carried by either three or only two
of the strands so that the remaining strands are purely for stabilising the load. This is especially the case when the
chain strands have not been shortened correctly; the strands are not of equal length and/or the lifting points have
not been precisely positioned. Once again, there is a danger that the chains become overloaded and break.
With increasingly higher angle of inclination, the power in the chain strands and also the tension force
(horizontal power component) on the load increase – see image 19. This can lead to damage/breakage of the load
or lifting points.
If the centre of gravity of the load is above the lifting points, then the load can become instable and can tip over.
This danger increases when the angle of inclination is below 15° as the load swings more.
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