Firstly, the replacement standard for steel wire ropes
Steel wire ropes may experience wear and fatigue after prolonged use, so they need to be replaced in a timely manner. So, how do we determine if the steel wire rope needs to be replaced? We can consider the following aspects:
1. Wear degree: The more severe the wear on the steel wire rope, the lower its load-bearing capacity. In general, if the wear reaches more than 10% of the diameter of the steel wire rope, it needs to be replaced.
2. Buckling fatigue: Steel wire ropes will continuously bend during use, resulting in fatigue. If the number of buckles exceeds a certain number of times, it needs to be replaced, usually 50% of the number of buckles.
3. Rust degree: Rust on steel wire ropes can lead to a decrease in their tensile strength. Therefore, if the degree of rust is too severe, it needs to be replaced. Generally, the diameter is 20% of the local rust.
4. Degree of damage: If the steel wire rope is damaged by cracks, deformation, or broken strands, it needs to be replaced in a timely manner.
The above are the main criteria for determining whether steel wire ropes need to be replaced.
Secondly, common types of wire rope damage
In addition to the situations that require replacement mentioned above, there are also some common types of damage to steel wire ropes, including:
1. Twisting: Steel wire ropes may twist during use, usually due to external forces. If twisted severely, it will lead to a significant reduction in the lifespan of the steel wire rope.
2. Wrapping: During use, steel wire ropes may become entangled due to uneven friction between the inner and outer surfaces of the rope. If the entanglement is too severe, it can cause the steel wire rope to break.
3. Fatigue: After prolonged use, the steel wire rope will experience fatigue, which can lead to a decrease in tensile strength.
4. Rust: Steel wire ropes are prone to rust in humid environments, resulting in a decrease in tensile strength.
5. Stretching: Steel wire ropes are constantly stretched during use, and excessive or frequent stretching can lead to a decrease in strength.
The above are common types of wire rope damage that require regular inspection and replacement.
In short, when using steel wire ropes, it is necessary to pay attention to checking their wear and damage, and replace them in a timely manner. Improper use of steel wire ropes can bring great safety risks.
