1.How to prevent rust and provide cushioning for inner packaging?
Rust-proof oil paper/Vapor-phase anti-rust paper: Wrapped around the surface of galvanized coils, the volatilized rust inhibitor forms a protective film on the metal surface, preventing white rust caused by condensation.
Plastic film (such as PE film): Used to protect against moisture and dust. Sometimes used in combination with rust-proof paper.
Corrugated paper or kraft paper: Serves as an inner lining to prevent direct contact between external packaging materials (such as steel strips) and the coil, providing cushioning and preventing damage.
2.How do side protections prevent edge damage?
Steel or plastic corner protectors: Placed on both ends of the galvanized coil, they protect the delicate edges from bumps and deformation during lifting and stacking.
Circular guard plates (fiberboard or multi-layer composite): Cover the entire end surface for more comprehensive protection.
3.How to tie and fix to ensure structural stability?
Steel strapping: This is the most important securing element. Strapping is typically performed radially (circumferentially) and axially (widthwise) around the coil.
Radial strapping: Typically, at least three straps are used, evenly spaced, to prevent the coil from unwinding during transport.
Axial strapping: This strapping passes through the coil core, locking the entire coil to the pallet or base to prevent rolling.
Locking buckles: Specialized steel buckles are used to secure the steel straps at their joints and tightened manually or pneumatically.
4.How are the outer packaging and the base packaged?
Base:
Wooden pallets: Most commonly used. Made of sturdy wood, they are easy to use with forklifts.
Steel bases/supports: Used for heavy steel coils (e.g., over 10 tons), providing enhanced support.
Outer packaging:
Waterproof woven fabric or tarpaulin: Covers the entire package and is secured with strapping to effectively protect against rain and moisture.
Iron sheets or high-strength composite panels: Used for fully sealed packaging, providing the highest level of protection, primarily for export by sea.
5.What are the common packaging types?
Simple/Standard Packaging (suitable for short-distance land transport and domestic trade)
Composition: Inner layer of rust-proof paper/film → Radial and axial steel strapping → Corner guards at both ends → Placed on a wooden pallet → Possibly covered with a woven fabric.
Fully Sealed Packaging (suitable for sea freight export and long-term outdoor storage)
Composition: In addition to standard packaging, the entire cylindrical surface of the galvanized coil is completely sealed with a ring of iron sheet or high-strength fiberboard, creating a "metal barrel" effect. A ventilation hole is usually left at the top to prevent condensation.
Horizontal Storage (Standing Package) vs. Vertical Storage (Low-Bundle Package)
Horizontal storage: This is the most common method, with the axis of the galvanized coil parallel to the ground. This method offers excellent stability and facilitates stacking, but it places greater pressure on the coil core and edges, requiring high-quality corner guards and bases.