Round slings are widely used in various lifting operations due to their flexibility, strength, and versatility. However, with so many types of round slings available on the market, it can be confusing to choose the right one. This blog will provide a detailed analysis of round sling types to help you make an informed decision.
What are the types of round slings?
Round slings mainly come in the following types:
- Single-Layer Round Slings: The most basic type, suitable for general lifting operations.
- Double-Layer Round Slings: An additional outer layer offers higher abrasion resistance and load capacity.
- Eye and Eye round slings: Similar to endless round slings, they have the same rated capacities and color-coded jacket system.
Load Capacity and Limitations of Different Round Sling Types
The load capacity of a round sling, also known as an endless sling, can vary depending on the material and the sling’s angle.
Material
Round slings can be made from a variety of materials, including polyester, Nylon, and Polypropylene. The load capacity of a round sling can range from 1–30 tonnes, or up to 45 tonnes.
Polyester: The most common material, offering good strength and abrasion resistance, suitable for general lifting operations.
Nylon: High strength and impact resistance, but performance decreases in wet conditions.
Polypropylene: Lightweight but relatively low strength, suitable for light loads.
The color of the sling’s cover can also indicate its load limit, different colors represent different load capacities. For example, purple usually indicates 1 ton, green indicates 2 tons, yellow indicates 3 tons, and so on. The sling will also have a label indicating the maximum load, manufacturing date, and relevant standards.
Angle
The load capacity of a sling can also be affected by the angle between the sling’s legs. As the angle decreases, the stress on the sling increases, which means the load on each leg increases. You can check the below table.
Pros and Cons of Different Round Sling Types
Round slings have several advantages and disadvantages, including:
Pros
- Better for heavier loads Round slings are better for loads that weigh between 6 and 30 tons.
- Protection Round slings can provide better protection for the load when lifting and lowering.
- Choker hold The ring shape of round slings makes them ideal for holding items in a choker hold.
- Lightweight Round slings are lightweight and easy to handle compared to other types of bridles.
Cons
- Limited stretchability The outer jacket of the sling limits how much it can stretch.
- Difficult to inspect The inner strands of the sling are not visible, making it hard to check for wear and tear.
- Susceptible to damage Abuse or misuse can cause kinking, crushing, or abrasion, which can damage the sling and make it weaker. Slings can also be susceptible to cuts and punctures from sharp edges.
- Not suitable for high or low temperatures Slings should not be used in temperatures above 400°F or below -40°F.
Application Scenarios of Round Slings
Round slings are widely used in different industries and applications:
- Construction Industry: For lifting and moving construction materials.
- Transport Industry: For loading and unloading cargo, especially large equipment.
- Manufacturing Industry: For lifting and moving heavy machinery and parts.
- Marine Engineering: For equipment installation and maintenance on ships and offshore platforms.
Conclusion
Choosing the right round sling is crucial for the safety and efficiency of your lifting operations. By understanding the different types of round slings, their load capacities, materials, color coding, and applications, you can make an informed decision that best suits your needs. Always prioritize safety by inspecting, maintaining, and using round slings correctly. By following these guidelines and considering our recommendations, you can ensure successful lifting operations and enhance the longevity of your equipment.