Pre-Painted Steel Sheet and Coil

Pre-Painted Steel Sheet and Coil
Pre-Painted Steel Sheet and Coil
Pre-Painted Steel Sheet and Coil
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  • Construction
    Pre-painted steel sheets and coils are a good choice for both outdoor and indoor construction projects. Outdoors, it’s commonly used in factory buildings, agricultural storage, prefabricated housing components, corrugated roofing, and rainwater systems such as gutters. It’s also ideal for balconies, kiosks, and roller shutter doors. Indoors, it’s frequently used in door frames, light steel structures, ceilings, and ventilation ducts, offering both durability and versatility.
  • Home Appliances
    Pre-painted steel has a durability and sleek finish that make it perfect for manufacturing refrigerators, washing machines, air conditioners, microwaves, and even toasters, ensuring long-lasting performance.
  • Furniture
    In the furniture industry, pre-painted steel is used for items such as radiators, lampshades, wardrobes, tables, beds, lockers, and bookshelves, offering a modern and durable solution for everyday use.
  • Transportation
    It’s widely used in the automotive and railway industries, particularly for interior panels, partitions, and containers. Additionally, it’s used in ship compartment panels and barriers, providing excellent structural integrity.
  • Other Uses
    Besides the industries mentioned above, pre-painted steel is a good choice for whiteboards, trash bins, advertising boards, clocks, control panels, weighing scales, and even photography equipment, combining function with aesthetics.
Storage and Transportation Guidelines
Storage Guidelines

Maintaining the quality of pre-painted steel requires proper storage. Here are some practices to ensure the pre-painted steel remains in optimal condition:

  • Keep the pre-painted steel in a dry, ventilated indoor space to prevent issues caused by moisture or temperature changes. Outdoor storage or areas with frequent condensation should be avoided.
  • Store materials in a clean environment, free from exposure to corrosive agents that could compromise their integrity.
  • Use a flat, sturdy surface with adequate load-bearing capacity to support the products. Avoid direct contact with the ground by placing coils on rubber mats, wooden supports, or racks. Ensure the locking buckles of horizontal coils face upward.
  • To prevent damage, avoid stacking steel coils. If stacking sheets, limit the layers and place heavier bundles at the bottom.
  • Over time, mechanical properties such as pencil hardness, T-bend values, and impact resistance may degrade. To maintain performance, it is recommended to process the material promptly.
  • Ensure sufficient space for lifting equipment to safely move the products without risk of damage.
  • Arrange storage areas strategically for easy access, reducing unnecessary handling and movement.
Transportation Guidelines

To ensure the quality of pre-painted steel during transportation requires careful handling and adherence to specific procedures. Below are some recommendations to keep in mind:

  • Always transport products in their original packaging. Do not remove or modify the protective materials provided at the factory, as they are designed to safeguard the product during transit. To avoid surface damage, place rubber pads between lifting tools and the product. Whenever possible, use specialized lifting equipment for added safety.
  • Prepare the vehicle properly before loading. Clean the truck bed thoroughly, and line it with rubber mats or similar protective materials. Ensure the sides of the vehicle are also padded to prevent any packaging from being dented or scratched.
  • Vertically packaged steel coils must remain upright during transportation and unloading to prevent deformation and ensure product stability.
  • Secure all items firmly to prevent movement or rolling during transit, which could cause damage or even accidents. Proper securing also minimizes the risk of unexpected impacts.
  • When unloading steel sheets, avoid dragging them across surfaces. The sharp edges or burrs from cutting can scratch or damage the layers underneath. Always lift sheets carefully and handle them gently, ensuring they don’t come into contact with hard or abrasive surfaces.

Pre-painted steel products are used by a wide range of customers, including:

  • Industrial construction companies
  • Home appliance manufacturers
  • Automotive manufacturers
  • Photovoltaic product manufacturers
  • Wind and nuclear power component manufacturers
  • Product distributors

Pre-painted steel products come with authoritative weather resistance test reports, including the following data:

  • ISO 16474 UV Aging: ΔE≤2 after 3,000 hours.
  • GB/T 10125 Salt Spray Test: No blistering after ≥1,000 hours.

Architectural pre-painted steel sheets have fully passed wind uplift tests and are compliant with standards such as GB/T 23930 and ASTM E1592. The product's high-strength S350GD steel substrate and concealed locking design provide wind uplift resistance of ≥3.5 kN/m.

Pre-painted steel products for home appliances meet food-contact safety standards and are certified in China (GB), the United States (FDA), and the European Union (EC). These products utilize a chrome-free passivation process and a zero heavy metal coating, in compliance with RoHS 2.0. They are tested to withstand ≥500 hours of salt spray with migration levels within compliant limits.

Pre-painted steel products for cold chain warehouses have excellent coating stability in low-temperature environments, ranging from -40℃ to 80℃. The products have passed the GB/T 13448 thermal cycling test, with an impact resistance of ≥5 J at -30℃ and no cracking on bending.

A five-layer protective packaging is used to prevent scratches:

  • Electrostatic PE film
  • 3D honeycomb paper
  • VCI anti-rust paper
  • AB flute carton
  • PLA corner protectors

This protective packaging, combined with a clean packaging process, ensures a scratch rate of ≤0.1%, significantly lower than the industry standard of 3-5%.

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