Grade 120 chain slings are the highest strength and most advanced chain slings available in the market. They are specifically designed for lifting heavy loads in demanding industrial applications. Here are the key aspects of Grade 120 chain slings:

Features

1. High Strength: Grade 120 chain slings offer approximately 50% higher working load limits (WLL) compared to Grade 80 slings and 25% higher than Grade 100 slings. This makes them suitable for extremely heavy lifting tasks.
2. Durability: Made from high-quality alloy steel, Grade 120 chains are highly resistant to wear, abrasion, and high temperatures. They also have superior toughness and fatigue resistance.
3. Safety: Enhanced safety features include higher working load limits and a design that minimizes the risk of sudden failure. They are also color-coded (often blue) for easy identification.
4. Efficiency: The increased strength allows for the use of smaller chain sizes without sacrificing load capacity, leading to lighter and more manageable slings.

Applications

1. Construction: Ideal for lifting heavy beams, girders, and other large construction materials.
2. Manufacturing: Used for moving heavy machinery, equipment, and large components within manufacturing facilities.
3. Marine: Suitable for lifting heavy cargo and equipment in shipyards and docks.
4. Mining: Employed in handling large mining equipment and materials.
5. Oil and Gas: Used in lifting heavy equipment and structures in the oil and gas industry.

Advantages

1. Higher Load Capacity: Grade 120 chain slings can handle significantly heavier loads than lower-grade chains.
2. Enhanced Safety: The higher working load limits and superior material properties reduce the risk of accidents and failures.
3. Cost Efficiency: Although initially more expensive, their durability and higher load capacity can lead to cost savings over time due to less frequent replacements and higher efficiency in lifting operations. This is especially true if you are able to size down to a smaller chain diameter due to its increased working load limit.
4. Versatility: Suitable for a wide range of lifting applications, particularly in industries where extremely heavy and large loads are common.

Inspection and Maintenance

1. Regular Inspections: Conduct frequent visual inspections to check for signs of wear, deformation, corrosion, and other damage.
2. Functionality Check: Ensure that all components, including hooks and master links, are in good working condition.
3. Lubrication: Keep the chain properly lubricated (especially any mechanical fittings) to prevent rust and reduce friction.
4. Load Testing: Perform periodic load testing to verify the sling’s integrity and strength.

Safety Considerations

1. Proper Use: Ensure that the slings are used within their rated capacities and follow the manufacturer's guidelines.
2. Angle of Lift: Be mindful of the angle between the legs in multi-leg slings, as this affects the sling’s load capacity. Smaller angles increase the load capacity.
3. Training: Operators should be properly trained in the correct use, inspection, and maintenance of Grade 120 chain slings.
4. Documentation: Maintain records of inspections, maintenance, and load testing to ensure compliance with safety regulations and standards.

Standards and Compliance

Grade 120 chain slings generally comply with rigorous international standards such as ISO, ASME, and EN. These standards ensure that the chains meet specific strength, durability, and safety requirements.

In conclusion, Grade 120 chain slings are the highest-performing chain slings available, offering exceptional strength, durability, and safety for heavy lifting operations in various industries. Proper use, regular inspection, and maintenance are essential to maximize their benefits and ensure safe lifting operations.