Q: What are the layers of standard export packaging for galvanized color-coated coils?
A: Standard packaging uses a multi-layer composite structure, consisting of a moisture-proof layer, a cushioning layer, protective plates, and a sturdy outer layer from the inside out.
This packaging is like a comprehensive "armor," ensuring the product is protected from damage during sea transport. The complete structure is roughly as follows:
Core Inner Layer (Rust and Moisture Protection): Adhering tightly to the steel coil is VCI vapor phase rust-preventive paper/film, covered with a waterproof plastic film, forming the first line of defense.
Cushioning Protection Layer: Corner guards/plates are added to the inner and outer rings of the steel coil, and if necessary, pearl cotton is wrapped around it to cushion vibrations and impacts during transportation.
Metal Outer Layer: The entire coil is wrapped with galvanized steel sheet or iron sheet, providing robust protection for the coating.
Pallet Securement: Finally, the packaged steel coil is secured to a wooden pallet or steel frame and firmly bound with multiple steel straps (e.g., 7 straps).
Q: What are the two main packaging methods for exported pre-coated steel coils? What are the differences?
A: There are two main packaging methods for exported pre-coated steel coils: "horizontal (layout)" and "vertical (standing)".
The main differences are as follows:
Horizontal Packaging (Layered): This is the most common method for steel coils at the factory and for export. The steel coils are placed horizontally, making them easy to load and unload using forklifts and other conventional equipment.
Vertical Packaging (Standing): The steel coils are fixed to a pallet with the center facing upwards. Its core advantage is that it better prevents the steel coils from "collapsed" (i.e., loosening and deforming) due to vibration during long-distance transportation.
Q: What are the key auxiliary materials used in the packaging? What are the functions of VCI paper and corner protectors?
A: Key auxiliary materials include VCI anti-rust paper/film, various corner protectors, and desiccants, each playing an indispensable role.
VCI material: Its principle is to continuously release anti-rust agents, forming a protective layer on the metal surface for long-lasting rust prevention, especially suitable for sea transport.
Corner protectors/rings: Installed on the sharp edges of steel coils, protecting the coil itself and preventing damage to the packaging material.
Desiccants: Inside sealed containers, desiccants absorb the hot, humid air, acting as the last line of defense for maintaining dryness.
Other materials: These also include stretch film for enhanced sealing and pearl cotton for internal filling and to prevent friction.
Q: Besides the product itself, how is the steel coil reinforced and secured inside the container?
A: A classic combination of "triangular wooden blocks + steel wire rope" is used for securing it, with the wooden blocks used to elevate the steel coil.
Export packing requirements are stricter than domestic export requirements. The main measures are as follows:
Bottom Elevation: A 15cm x 15cm hardwood block is placed longitudinally directly under the steel coil to separate it from the container floor, providing moisture protection and facilitating forklift operations.
Lateral Restraint: Wooden blocks of the same size are placed laterally at both ends of the steel coil and connected and secured with triangular wooden blocks to prevent slippage.
Steel Wire Rope Tension: Two steel wire ropes with a rated tensile strength of no less than 10 tons are used, passing through the center of the steel coil and diagonally secured to the fixing rings on both sides of the container.
Side Support: Wooden supports with a height no less than that of the steel coil are used between the steel coil and the container side walls to ensure stability during transportation.
Q: What are the requirements for labeling and related documents on export packaging?
A: Strictly regulated labeling and related documents on packaging are crucial for smooth customs clearance and delivery.
These requirements can be divided into two main categories:
Packaging Labeling: Clear labels must be affixed in a prominent location, such as shipping marks (consignee, port of destination, etc.), moisture-proof, fragile, and "upside down" indicators. If solid wood pallets are used, an IPPC fumigation mark must also be affixed.
Accompanying Documents: A detailed packing list must be included, specifying the roll number, net weight, gross weight, and dimensions of each roll. A commercial invoice, bill of lading, certificate of quality, and certificate of origin, among other customs clearance documents, must also be provided.