What is the scrap standard for crane wire rope?

Answer: The scrapping standards for wire ropes are as follows:

(1) According to the GB6067-85 standard, when the safety factor is less than 6, the number of scrapped and broken wires of the alternately twisted wire rope is about 10% of the total number of wires in the wire rope. When the safety factor is 6~7, the number of scrapped and broken wires is about When the safety factor is greater than 7, the number of scrapped and broken wires is about 14% of the total number of wire ropes.

The number of broken wires of the wire rope can also be scrapped according to the data proposed in GB5972-76 "Practical Specification for Inspection and Scrap of Wire Rope for Hoisting Machinery".

(2) When the radial wear or corrosion of the steel wire exceeds 40% of the original diameter, the steel wire rope should be scrapped. When not more than 40%, the number of scrapped broken wires in the GB6067-85 standard should be reduced according to the percentage of surface wear or corrosion of the steel wire according to the reduction factor specified in the standard, and scrapped according to the number of broken wires after reduction .

(3) The number of scrapped and broken wires of wire ropes used for hoisting hot metal or dangerous goods shall be taken as half of the scrapped and broken wires of general hoisting wire ropes. These include reductions for wire surface wear and corrosion.

(4) The whole wire rope is broken and should be scrapped.

(5) The diameter of the wire rope is reduced by 7% and should be scrapped.

(6) If any of the following situations are found in the visual inspection of the steel wire rope, it should be scrapped: the hemp core is exposed; obvious corrosion, dead knot, the outer steel wire is elongated in a cage-like state, and the amplitude of the wave deformation is not less than 3/3 of the diameter of the wire rope. 4. The rope strands are extruded, and the rope diameter is locally increased; if the rope is severely kinked, the rope diameter is seriously reduced locally, and some are severely flattened and bent; when the surface of the wire rope appears a recognizable color due to the action of heat or arc.