NEWS

How to determine whether the rope should be scrapped? What rope scrapped criteria?

April in some areas around the industrial differentiation downward pressure: in April this year, differentiation around industrial development continues. Chongqing, Tibet, Jiangxi, Guizhou, above-scale industries is still high. The Northeast and Shanxi regulatory industrial growth is still negative, and Inner Mongolia, Jilin, Shandong, Hunan, Guizhou and other places continued growth decline. In April this year, although industrial production situation turns for the better, above-scale industrial growth reached 5.9%.

1. For cross-wound rope in a twisting pitch (refer to any shares of a rope surround the axial distance of the week) broken wires within the rope up to 10% of the total number of wires. For example: the number of 6 × 19 wire rope is 114 wire, when the number of broken wires up to 12 wire scrap when necessary, such as the number of wire rope 6 × 37 222 wire rope, when the number of broken wires up to 22 wire scrap when necessary. For the thickness of the wire rope composed, calculated the number of broken wires is considered a single filament, a thick wire Operators 1.7.

2. When broken wire is not the same twist pitch inside, the total number of broken wire has not yet reached 10%, while reducing the rope diameter amounted to 7%, even if not broken wire rope also need to be scrapped. Rope scrapped

3. rope lifting hot metal or dangerous goods, which scrapped broken wires generally take half a crane, such as: the number of 6 × 19 when the wire rope is 114 wire, when the number of broken wires up to 5% when it is 6 yarn to scrap, broken wire if local accumulation, broken wires close together to form a local gathering, should be scrapped or broken wires directly concentrated in the surge, the number should be broken up to 5% scrap wire.

4. Due to the narrow local or abrasion wear, corrosion or wire rope wear surface layer up to 40% of the surface of the original wire diameter that is scrapped. Rope scrapped

5. The rope severe wear, fiber or obvious main core projecting internal corrosion, femoral surface voids disappear completely internal damage, the rope can be scrapped.

6. rope and aluminum joints for cracks or deformation slip; Spliced Spliced wire rope rigging parts of a serious draw off; cast anchor rope and rope connections have displacement pump off phenomenon occurred.

7. The rope surface wear or corrosion, there are a certain number of broken wire, rope soaked severe corrosion in chemically treated water caused by broken wires shall be specified in item 1 or item 2 is multiplied by the reduction factor after determination

8. Since the outer layer of twisted rope elongation partial imbalance was "cage" –shaped

9. rope fiber core diameter increases more serious

10. Typical wire rope bending fatigue caused by broken wire

11. kinked wire rope, dead, hard curved, plastic deformation, hemp core prolapse and other serious distortion.

12. The entire strand breaks or burn.