If the lifting capacity is sufficient, it can replace the steel wire rope. It depends on the site conditions. The speed of the chain hoist is relatively slow, while the speed of the steel wire rope combined with the winch is relatively fast.
China’s annual steel rope production of 1.8 million tons ranks first in the world. Phosphate-coated steel wire rope is a revolutionary innovative technology in the world’s steel wire rope field. Its service life (fatigue life) has greatly increased, and smooth steel wire ropes have been completely eliminated. , fully entering the era of phosphate-coated steel wire ropes:
1. Phosphated-coated steel wire ropes (Chinese patent), after manganese or zinc-manganese phosphating treatment, the surface wear resistance and corrosion resistance of the steel wires have been comprehensively improved. , the GB/T11376-1997 National Standard for Metal Phosphate Conversion Coating has a detailed introduction to the wear resistance and anti-rust effects of the phosphating film. The grease penetrates into the pores of the phosphating film and plays an extremely excellent friction-reducing effect, effectively inhibiting the internal friction of the wire rope. If the surface of the steel wire is worn, it is an upgraded product of the smooth steel wire rope. It can be used instead of galvanized steel wire ropes that are first plated and then pulled out with a thin zinc layer. At present, the fatigue life of phosphated ropes is about 3 times that of smooth ropes, and the best is 4 times. By comparing the fatigue life through fatigue tests, in the future, with in-depth research on wear-resistant phosphating solutions, the service life can be greatly improved. The phosphating film is 3-60 g/m2. The steel wire is directly twisted into a wire rope without drawing processing after phosphating.
Note: Do not confuse zinc-based phosphating for drawing with manganese-based or zinc-manganese-based phosphating for rope making wire. This technology is suitable for the production of a variety of wire ropes, such as elevator wire ropes, important purpose wire ropes, mining wire ropes, anti-rotation wire ropes, oil production wire ropes, pile driver wire ropes, etc. It has a longer service life, lower usage costs, and better stability. . .
2. Galvanized steel wire ropes include hot-dip galvanizing and electro-galvanizing. The direct-lift hot-dip galvanized steel wire has a thicker zinc layer. The thicker the zinc layer, the stronger the corrosion resistance and the longer it will last. Electroplated zinc is thinner. Since the phosphating coating has certain anti-corrosion properties, manganese phosphating coated steel wire ropes can replace some types of galvanized steel wire ropes with thin zinc layers, such as high-temperature environments with atmospheric environments but humid air, while hot-dip galvanizing-phosphating double The corrosion resistance of coated steel wire ropes is further improved.
3. Stainless steel wire rope, a steel wire rope twisted with stainless steel wire, such as 304 or 316 stainless steel, has higher corrosion resistance than hot-dip galvanized carbon steel wire rope, and is relatively expensive. The stainless steel wire is treated with manganese phosphorus Chemical coating treatment (phosphating stainless steel wire requires a special phosphating formula) can also greatly extend the service life.
4. Plastic-coated steel wire rope. Based on the steel wire rope, the outer layer of the steel rope or strand rope is coated with polyethylene or polypropylene.
5. Smooth steel wire ropes were produced in the United Kingdom in 1834. In China, Tianjin No. 1 Steel Wire Rope Factory began production in 1939 (it went bankrupt in 2005). As phosphate-coated steel wire ropes enter the market in large quantities, they will be phosphated. Chemically coated steel wire ropes will be completely eliminated.
6. Steel wire ropes for marine engineering mooring, relevant standards are in the process of formulation and approval
7. Cable wire ropes
Manganese-based phosphating coating is preferred for atmospheric environment For steel wire ropes, hot-dip galvanized-phosphated double-coated steel wire ropes are preferred in corrosive environments. Marine steel wire ropes are preferred in seawater environments because they have longer service life and lower usage costs.