As long as the minimum breaking force of the steel wire rope is more than 6 times the weight of the propeller, and the steel wire rope can be used to bind the propeller firmly and the stress point will not cause deformation and damage to the propeller, then a reasonable crane can be used to lift the propeller. transportation task.
China ranks first in the world with an annual output of 1.8 million tons of steel ropes. The main varieties are as follows:
1. Phosphating coated steel wire rope (patented technology), steel wire treated with manganese or zinc-manganese Phosphating treatment improves the wear resistance and corrosion resistance of the steel wire. The combined effect of the phosphating film and the grease effectively inhibits the occurrence of fretting wear and completely solves the wear problem of the steel wire rope. The fatigue life is 3 times that of the smooth steel wire rope with the same structure. About times, the fatigue life can be verified through fatigue tests (the most credible is to conduct fatigue tests in person). It is an upgraded product of smooth steel wire ropes, and can also be used as an alternative to galvanized steel wire ropes that are first plated and then pulled out with a thin zinc layer (can be used through salt spray Test or compare corrosion resistance), longer service life, lower use 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