U-shaped metallic hanging ring are made from metal as the base material, through precision forming and strengthening treatment. The structure is divided into closed-loop and semi-closed-loop types. During use, they have the characteristics of structural stability, adaptability, environmental resistance, and high safety factor. Of course, these characteristics are inseparable from the selection of materials. Below, we will introduce the materials usually selected during production.
Carbon steel: Carbon content is about 0.12%-0.45%, tensile strength is 400MPa-600MPa, yield strength is 235MPa-355MPa. It is usually used in medium-sized hoisting. Carbon steel has low cost and high mechanical strength, so it is a very cost-effective material in foreign trade exports, accounting for more than half of the total export volume.
Stainless steel: There are many types of stainless steel, including 304, 316, and 316L. From a cost perspective, users usually choose 304 stainless steel, which contains 18% chromium and 8% nickel, has a tensile strength ≥515MPa, strong corrosion resistance, and is suitable for humid and mild salt spray environments. It is mainly exported to Southeast Asia and inland Europe,316 stainless steel is based on 304 with the addition of molybdenum, which improves its resistance to salt spray and chemical corrosion by more than 50%. It is suitable for marine, coastal, and chemical applications and is exported to coastal countries in Europe, America, Australia, and the Middle East.
Alloy steel: Its properties are enhanced by alloying elements. It has a tensile strength of ≥800MPa, a yield strength of ≥650MPa, is resistant to high temperatures of -40℃ to 300℃, has good fatigue resistance, and can be used in extreme loads.
The application of U-shaped metallic hanging ring in the power industry is a global necessity. As connectors between transmission lines and communication networks, they perform three main functions: insulator connection, tower hardware fixation, and cable suspension. Particularly in high-voltage transmission lines, heavy-duty lifting rings, used in conjunction with insulator strings and towers, facilitate conductor tension transmission. With a rated load of 69kN-200kN, they must comply with international power fitting standards such as IEC 61466 and GB 2314. After meeting the export standards of various countries, they can be widely used.
For foreign trade customers or users who are using U-shaped metallic hanging ring for the first time, they are more concerned about how to maintain and care for them during long-term use. If the product's lifespan can be extended through maintenance and care, which reduces the investment cost, it would be a very good thing.
Load Management
Load is a very important parameter during use. Many users wonder if the load will change as we use it. In fact, we should avoid overloading during use. Overloading can lead to plastic deformation and fracture, especially when the components are connected in series. We must ensure that the load is evenly distributed.
Regular inspection
Only inspection can detect problems. During long-term use, it is recommended to inspect every 3 months. The inspection should include whether the main body is deformed or cracked, and whether the pins and bolts are loose or corroded. Loose parts should be tightened in time, and deformed parts should be replaced in time. Do not use it if it does not meet the requirements.
Cleaning and maintenance
How to clean depends on the environment. For example, in a dry environment, wipe the surface dust with a dry cloth. Do not use a wet cloth or corrosive cleaning agents. For marine environments, rinse the surface with fresh water and wipe it dry. Apply anti-rust oil to maintain its corrosion resistance.
Storage requirements
The storage environment should be dry, ventilated, and cool, avoiding moisture, direct sunlight, and corrosion from acidic or alkaline media. If there are U-shaped metallic hanging ring of different materials, they should be stored separately. When stacking, avoid exceeding 1.5 meters, as excessive height may cause deformation under heavy pressure.
Replacement criteria
Many users have this question: Under what circumstances should the lifting ring be replaced? For example, if the body has cracks and plastic deformation, the surface rust area exceeds 30%, the coating has peeled off in large areas, and the pins and bolts are loose and cannot be tightened, then it must be replaced.
Troubleshooting
If a malfunction occurs during use but the device can still be used after inspection, then we need to troubleshoot the problem. After an abnormality occurs, we should stop using the device immediately and check whether the load is exceeded, whether the installation is correct, or replace it with a qualified product before putting it into use.
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