1.In what situations is it necessary to use enclosed/fully enclosed vehicles for transportation?
Stainless Steel Cold-Rolled Coil
Reason: Extremely high surface finish requirements; used in kitchenware, elevators, home appliances, etc. Strict prevention is necessary to avoid:
Rain/Mud: Causes water stains and corrosion.
Dust/Particulate Matter: Causes scratches during transportation (especially sensitive to hairline cracks and brushed surfaces).
Other Contaminants: Such as chemical spills.
Vehicle Requirements: Preferred vehicle type is a box semi-trailer or a fully enclosed container.
Silicon steel (electrical steel) coils
Reason: Used in motor and transformer cores, with a special insulating coating on the surface. Moisture or contamination will severely affect its electromagnetic properties and insulation.
Vehicle requirements: Must be used in fully enclosed vehicles with excellent rain and moisture protection; some high-end products even require control of humidity inside the vehicle compartment.
High-end automotive and appliance panels
Reason: Used for automotive exterior panels and high-end appliance panels, requiring "zero tolerance" for surface defects. Besides waterproofing, they must also protect against impacts from flying gravel on the road.
Vehicle requirements: Typically uses fully enclosed vans, with internal soft protection (such as straw mats and special corner protectors) to prevent friction between steel coils or between the steel coils and the vehicle body.
2.In what situations can rainproof tarpaulins be used to cover transportation?
Most ordinary carbon steel cold-rolled coils are transported using this method.
Reason: Their surface has a certain degree of rust resistance, and they are often used for structural components that require subsequent painting or are not sensitive to minor rust. The core requirement is to prevent continuous rain and water accumulation.
Vehicle Requirements: Ordinary flatbed semi-trailers or high-sided trucks are required, but they must be equipped with a complete, undamaged rainproof tarpaulin (usually three-proof fabric), and securely fastened to ensure that wind and rain cannot penetrate.
Precautions: Even with a tarpaulin, moisture may still seep in at the edges or ventilation points after long-distance or inclement weather transport, causing minor water rust (edge rust) to appear at the ends of the coils. This is generally considered an acceptable transport risk, but liability must be clearly defined in the transport agreement.
3.What are other critical protection requirements during transportation?
Anti-slip and anti-scratch measures: Anti-slip straw mats, wooden strips, or special rubber mats must be placed between the steel coil and the truck bed to prevent slippage and friction damage.
Reinforced binding: High-strength horizontal and vertical binding must be performed using wire ropes, fasteners, or special steel coil locks. It is absolutely forbidden to use only tarpaulin ropes for securing the coil.
Preventing deformation: Ensure the steel coil is in an upright (axially perpendicular) state during transportation, and use "saddles" or special brackets to support the inner hole to prevent core deformation.
4.What type of vehicle is recommended for transporting stainless steel coils and electrical steel coils?
Fully enclosed van/container
Absolutely dustproof, rainproof, and pollution-proof
Surface quality is life itself; contamination directly leads to scrapping.
5.What suggestions do you have?
Define the cargo type: First, confirm whether you are transporting ordinary materials or materials with high surface requirements.
Clearly specify in the contract: The transportation contract must clearly specify vehicle requirements (e.g., "fully enclosed van" or "equipped with a brand new rainproof tarpaulin") and surface acceptance standards. This is the key basis for determining liability for cargo damage during transportation.
Supervise loading: Inspect the cleanliness of the vehicle, the protective padding, and the security of the strapping.
Insurance: Purchase transportation insurance for high-value roll materials.