How to maintain steel wire rope

2022-08-21
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How to maintain steel wire rope

1 During the use of the steel wire rope, it shall be prevented from looping, kinking, bending or sticking sundries, and from rubbing with machinery or other sundries

2 After the installation of the tower crane (before use), the steel wire rope should be lubricated and coated with graphite grease. Later, the steel wire rope should be lubricated according to the crane lubrication table

3. The overall design of the tower crane does not allow the steel wire rope to have an indefinite life, and it should be scrapped in one of the following cases:

a. the steel wire rope 619-d (d steel wire rope diameter) has more than 5 broken wires in 6D length and more than 10 broken wires in 30d length

b. steel wire rope 637-d (d diameter of steel wire rope) C) there is a pressure gauge on the oil pump, the number of broken wires is more than 10 within 6 days, and the number of broken wires is more than 19 within 30 days

c. if the steel wire ropes are close together, even if the number of broken wires does not exceed 5 within 6D, they should be scrapped

d. although the steel wire rope is not broken, the wear of the steel wire rope reaches 40% of its diameter, or the steel wire rope is reduced by 7% or more relative to the nominal diameter, or the steel wire rope is obviously bent, etc

e. the steel wire rope loses its normal shape, resulting in deformities, such as waves, cage distortion, rope strand extrusion, steel wire extrusion, local increase of rope diameter, kink, local decrease of rope diameter, partial flattening, bending, and widening the utilization field of plastic

f. when the diameter of steel wire rope is subjected to special thermal action and identifiable colors appear on the outside

note: in June: when lifting molten or hot metals, acid solutions, explosives, and combustibles, the scrap quantity of broken wires of steel wire ropes will be halved. Cases not mentioned in this manual shall be implemented in accordance with gb5972

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