Sixty-five tons of steel wire rope with four lifting points.

The lifting capacity is 65 tons and there are four lifting points. Assuming that the four lifting points are uniformly stressed, each lifting point bears 16.25 tons, and the safety factor is 6. The minimum breaking force of each wire rope must be 97.5 tons, which is the national standard of important wire ropes (GB 8965,438+08-2006), with 6*36WS structure and 1770MPa steel core. The minimum breaking force is 10 10KN, which is about103t, meeting the requirements. Considering that the four wire ropes may be unbalanced in the actual lifting, the wire rope with larger diameter can be selected, which has higher safety factor and is for reference only.

The annual output of steel wire rope in China is 6,543,800,000 tons, ranking first in the world. The main varieties are as follows:

1. Phosphating coated steel wire rope (patented technology), the steel wire is phosphatized by manganese series or zinc-manganese series, and the wear resistance and corrosion resistance of the steel wire have all jumped. The compound action of phosphating film and grease can effectively inhibit fretting wear, and the fatigue life is about 3 times that of smooth steel wire rope with the same structure. Fatigue life can be verified by fatigue test (it is most credible to do fatigue test in person). It is an upgraded product of smooth steel wire rope and can also replace galvanized layer.

2. Galvanized steel wire rope, including hot dip galvanizing and electro-galvanizing. Generally speaking, the galvanized zinc layer is thick and the galvanized zinc layer is thin.

3. Stainless steel wire rope, mainly made of 304 or 3 16 stainless steel, has excellent anticorrosion effect, but it is expensive.

4. Based on plastic-coated steel wire rope and carbon steel wire rope, the outer layer is coated with polyethylene, polypropylene or nylon.

5. Due to the sharp drop in market demand, smooth steel wire rope will be completely replaced by phosphating coated steel wire rope.

6. Steel wire rope for mooring in offshore engineering

7. Wire rope

For use in atmospheric environment, phosphating coated steel wire rope is preferred, hot dip galvanized-phosphating double-coated steel wire rope is preferred in heavy corrosion environment, and marine steel wire rope is preferred in seawater. Please note that the name of wire rope, such as phosphating coated wire rope or 3 16 stainless steel wire rope, must be indicated on the purchase invoice to protect your legitimate rights and interests. In addition, patented products will generally mark the patent number on the outer packaging of wire rope for reference only.