The lifting capacity is 100 tons. It is assumed that the pulley group stresses the steel wire rope to 25 tons. The safety factor is 6. The minimum breaking tension of the steel wire rope must be more than 150 tons. GB8918-2006 important purpose steel wire rope, 35*7 steel core 1770MPa strength level , 52 mm in diameter, with a minimum breaking force of 1520 kN, about 155 tons, which meets the requirements and is for reference only
The main varieties of steel wire ropes produced in China are as follows:
1. Phosphate coating Steel wire rope (patented technology). The steel wire is treated with manganese or zinc-manganese phosphating. The wear resistance and corrosion resistance of the steel wire are greatly improved. The combined effect of the phosphating film and the grease effectively inhibits the occurrence of fretting wear and completely solves the problem of steel wire rope. wear problem, the fatigue life is 3 times that of smooth steel wire ropes with the same structure. The fatigue life can be verified through fatigue tests (the most credible is to do the fatigue test yourself). It is an upgraded product of smooth steel wire ropes, and can also replace plating first and then pulling out. The use of galvanized steel wire ropes with a thin zinc layer (which can be tested through salt spray tests or compared with corrosion resistance) has a long service life, lower unit cost and better stability.
2. Galvanized steel wire rope, including hot-dip galvanizing and electro-galvanizing. Generally speaking, hot-dip galvanizing has a thick zinc layer and electro-galvanizing has a thin zinc layer.
3. Stainless steel Steel wire rope, mainly made of 304 or 316 stainless steel, has excellent anti-corrosion effect but is expensive
4. Plastic-coated steel wire rope, based on carbon steel wire rope, the outer layer is coated with polyethylene, polypropylene or nylon
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5. Smooth steel wire ropes have a short service life and a sharp drop in market demand, and will be completely eliminated by phosphate-coated steel wire ropes.
6. Steel wire ropes for marine engineering moorings
7. Cable wire ropes
For use in atmospheric environments, phosphating coated steel wire ropes are preferred, and in heavily corrosive environments, heat-resistant wire ropes are preferred. Galvanized-phosphating double-coated steel wire rope, offshore steel wire rope is preferred in sea water. When purchasing, please note that the name of the steel wire rope, such as phosphate-coated steel wire rope or 316 stainless steel wire rope, must be indicated on the purchase invoice to protect your legitimate rights and interests. In addition, patented products generally have a patent number spray-marked on the outer packaging of the steel wire rope, and a warranty. The book should have main technical indicators, such as phosphating film type and film weight, for reference only