How Steel Coils Are Packaged

1. Pre - packaging Inspection

Before the actual packaging begins, a thorough inspection of the steel coils is carried out. This includes checking for surface defects like scratches, rust, or dents. Any coils that do not meet the quality standards are either set aside for rework or rejected. Additionally, the dimensions of the coils, including diameter, width, and thickness, are verified to ensure they match the specified requirements. This step is crucial as it guarantees that only high - quality and correctly sized coils proceed to the packaging stage, reducing the risk of problems during subsequent handling and use.

2. Selection of Packaging Materials

The choice of packaging materials depends on factors such as the type of steel, the transportation distance, and the storage conditions. The most common materials used for steel coil packaging are:

VCI (Volatile Corrosion Inhibitor) Paper: This special paper is impregnated with corrosion - inhibiting chemicals. When wrapped around the steel coil, it forms a protective layer that prevents the formation of rust by releasing volatile substances that inhibit the electrochemical corrosion process.

 Plastic Film: High - density polyethylene (HDPE) or polypropylene (PP) plastic films are widely used. They provide a barrier against moisture, dust, and other environmental contaminants. The film can be either transparent or colored, and it can be of different thicknesses depending on the level of protection required.

Steel Straps: These are used to secure the packaged coil and prevent it from unwrapping during transportation. Steel straps are strong and durable, able to withstand the forces exerted during handling and shipping.

Wooden Pallets or Skids: For easier handling and storage, steel coils are often placed on wooden pallets or skids. These provide a stable base and allow for the use of forklifts or other lifting equipment to move the coils.

3. Wrapping Process

Inner Wrapping with VCI Paper

The first layer of protection is applied by wrapping the steel coil with VCI paper. The paper is carefully unrolled and wrapped tightly around the entire circumference of the coil, ensuring that there are no gaps or overlaps that could allow moisture or air to penetrate. The ends of the paper are tucked in securely to keep the coil completely covered.

Outer Wrapping with Plastic Film

After the VCI paper is in place, a layer of plastic film is wrapped around the coil. This can be done manually or using automated wrapping machines. The plastic film is wound around the coil multiple times, creating a thick, protective layer. The tension of the film is carefully controlled to ensure a tight fit without damaging the coil or the inner VCI paper. Some advanced wrapping machines can also apply heat - sealing techniques to further enhance the integrity of the plastic film layer.

Strapping

Once the coil is fully wrapped with both VCI paper and plastic film, steel straps are applied. The straps are placed at regular intervals around the circumference of the coil, usually at the top, bottom, and middle sections. The straps are tightened using strapping tools to ensure a firm grip on the coil, preventing it from shifting or unwrapping during transportation.

4. Placement on Pallets or Skids

The packaged steel coil is then carefully lifted and placed on a wooden pallet or skid. The coil is centered on the pallet to ensure stability during movement. In some cases, additional blocking or bracing may be used to prevent the coil from rolling off the pallet. The pallets are designed to be strong enough to support the weight of the steel coil, which can range from a few hundred kilograms to several tons.

5. Labeling and Documentation

Finally, the packaged steel coil is labeled with important information such as the coil number, steel grade, dimensions, weight, and production date. This information is typically printed on waterproof labels and attached to the coil or the pallet. Additionally, a packing list or shipping document is prepared, which includes details about the contents of the shipment, the destination, and any special handling instructions. This documentation is essential for inventory management, tracking, and customs clearance during international shipments.