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Safety in action 18 Super Alloy User's information General KWB sling chains and accessories can be used for general lifting purposes acc. EN 818-4. Chains should only be used by trained personnel, who have read and understood the instructions for use. KWB sling chains and components should not be altered e.g. twisting, grinding, removing of parts and drilling. The surface of the chains and accessories should not be subjected to acids or caustic solutions. If necessary please contact the KWB technical department. Only use the KWB chains and accessories up to the indicated temperature. Should the temperature be exceeded the reduction of the load capacity must be taken into consideration (see page 7). In the event of temperatures outside this range, do not use the chain slings. Do not use KWB lifting chains and accessories in acids, alkalines or chemicals or expose them to their fumes. NB. Certain production procedures release acids and or fumes. If necessary please contact KWB. In especially dangerous conditions (e.g. offshore applications, lifting of persons or potentially dangerous loads i.e. molten metals, corrosive materials, nuclear substances) the working load limit must be adjusted according to the risk level by an expert. Inspection & Maintenance Before using any lifting equipment for the first time please check the following: - The sling chain corresponds exactly to the order. - The test certificate or certificate of conformity have been supplied. - Marking & working load limit of the chain correspond with the information on the test certificate or certificate of conformity. - All the data regarding the sling chain has been entered in a register for lifting equipment, if required. - Before use check the chains for visible damage or signs of wear. In case of damage do not use the chains. In case of doubt likewise. - Sling chains depending on use should be inspected by an expert once a year i.e. after unusual events that could cause impairment of the chain sling. - Every two years it is recommended that the chain be subjected to a load test 1,5 times the working load limit, followed by a visual inspection. Should the following criteria no longer be met, the chain must be taken out of use and passed onto a competent person. - Broken link. - Missing working load tag on the chain sling or illegible marking on the tag. - Elongation of the chain. The chain must be discarded if t >1,05 t. (see catalogue). - Wear: Wear is determined as the mean value of two measurements of diameters d1 and d2 carried out a right angle. (see drawing). The chain must be discarded. See catalogue. d 1 + d 2 2 < 0,9 d - Cuts , notches, grooves, surface cracks, excessive corrosion, discoloration due to heat, signs of additional welding, twisted links or other faults. - Missing i.e. non-functioning safety device or signs of widening of the hook i.e.noticeable enlargement of the opening or other forms of deformation.