Prepainted Galvanized Steel Coils

Prepainted Galvanized Steel Coils (PPGI) are a popular material in industries like construction, automotive, and home appliance manufacturing due to their durability, aesthetic appeal, and corrosion resistance. These coils are produced by applying a layer of paint over galvanized steel, enhancing the metal’s performance and extending its lifespan in various applications. This article provides a comprehensive overview of prepainted galvanized steel coils, including their size and technical specifications, pricing, and main uses.

What Are Prepainted Galvanized Steel Coils?

Prepainted galvanized steel coils are galvanized steel sheets coated with paint to add an extra layer of protection and aesthetic value. The galvanized layer offers corrosion resistance, while the paint coating enhances durability, weather resistance, and appearance. PPGI is typically used in environments exposed to harsh weather conditions or where a decorative finish is desired.

Key Features of PPGI:

• Corrosion Resistance: The galvanized layer protects the steel from rust and corrosion, making it ideal for outdoor applications.

• Aesthetic Flexibility: Available in various colors and finishes, these coils are used for aesthetic purposes in architecture and consumer goods.

• Durability: The painted layer protects the metal against scratches, moisture, and UV rays, extending its lifespan.

• Customizable: Prepainted galvanized steel can be manufactured in different thicknesses, widths, and colors to meet the specific needs of various projects.

Size Specifications for Prepainted Galvanized Steel Coils

Here is a detailed size specification table for prepainted galvanized steel coils:

Common Sizes of Prepainted Galvanized Steel Coils:

• Thickness Range: 0.15 mm - 1.2 mm

• Width Range: 800 mm - 1250 mm

• Typical Coil Weight: 5 - 8 tons

These dimensions make PPGI coils suitable for various applications where size flexibility is important, such as roofing, wall cladding, and appliance manufacturing.

Technical Specifications for Prepainted Galvanized Steel Coils

The technical performance of prepainted galvanized steel is critical to its effectiveness in applications where both aesthetics and protection are important. Below are the key technical specifications:

Key Properties of Prepainted Galvanized Steel Coils:

• Zinc Coating: The zinc layer provides corrosion resistance, making the steel durable in harsh environments.

• Paint Coating: The top and back coatings provide additional protection against environmental factors like moisture and UV light. Different paints (e.g., PE, PVDF) can be used based on the application.

• Weather Resistance: Designed to withstand exposure to sunlight, rain, and changing temperatures without degradation.

Price List for Prepainted Galvanized Steel Coils

Prices for prepainted galvanized steel coils vary based on factors like thickness, zinc coating weight, and paint type. Below is a general pricing table:

Price Influencing Factors:

1. Thickness: Thicker coils generally cost more as they contain more raw materials.

2. Zinc Coating Weight: Higher zinc coating offers better corrosion resistance but increases the price.

3. Paint Coating: High-end coatings like PVDF add to the cost but provide superior durability and color retention.

4. Custom Colors and Finishes: Special color orders or unique finishes like wrinkled or patterned coatings may increase costs.

Prepainted galvanized steel coils hs code 72107010

The HS code 72107010 refers to Prepainted Galvanized Steel Coils under the Harmonized System (HS) used for international trade classification. This specific code falls under Chapter 72, which is dedicated to Iron and Steel products.

Here is a breakdown of HS Code 72107010:

• 72: Chapter for Iron and Steel.

• 1070: Subheading for Flat-rolled products of iron or non-alloy steel, of a width of 600 mm or more, plated or coated with zinc.

• 10: Further classification that specifies prepainted, varnished, or coated with plastics.

HS Code 72107010 is used for:

• Prepainted Galvanized Steel Coils or sheets that have been coated with a layer of zinc (galvanized) and painted for added protection and aesthetics.

This code is used by customs authorities to track and classify these products during import and export. Depending on the country, the code might be linked to specific import duties, tariffs, and trade regulations.

Main Uses of Prepainted Galvanized Steel Coils

PPGI coils are used in a wide range of industries due to their versatility, durability, and aesthetic options. Below are some of the most common uses:

1. Building and Construction

• Roofing and Wall Cladding: PPGI coils are extensively used for roofing panels, wall panels, and cladding systems in residential and commercial buildings. Their weather resistance and color options make them perfect for long-lasting, visually appealing exteriors.

• Siding and Facades: The coils are used in architectural facades and siding for modern buildings, combining durability with design flexibility.

2. Automotive Industry

• Car Body Panels: Prepainted galvanized steel is used for automotive body parts due to its strength, corrosion resistance, and smooth finish. It is particularly used in non-structural parts where aesthetic appeal is important.

• Truck Trailers and Containers: In logistics, PPGI is used for manufacturing truck bodies, containers, and storage units that are exposed to the elements.

3. Home Appliances

• Appliance Housings: Refrigerators, washing machines, air conditioners, and microwave ovens are often manufactured with PPGI due to its attractive finish and resistance to rust.

• Interior Panels: Prepainted galvanized steel is also used for interior panels of appliances to provide a long-lasting, rust-free surface.

4. Furniture

• Office Furniture: Metal furniture, especially in office environments, utilizes prepainted steel for its aesthetic value and durability.

• Shelving and Racks: It is also used for the production of metal shelving and storage racks due to its corrosion resistance and strength.

5. Agricultural and Industrial Sectors

• Grain Silos and Storage Units: PPGI is commonly used in agriculture for the construction of grain silos, storage units, and barns due to its corrosion-resistant properties, especially in moist environments.

• Fencing: Durable and resistant to weather conditions, PPGI coils are ideal for outdoor fencing applications.

Prepainted galvanized steel coils (PPGI) offer a perfect combination of protection, durability, and aesthetic appeal, making them a top choice for a variety of industries including construction, automotive, and home appliances. With customizable sizes, thicknesses, and finishes, PPGI can meet diverse project requirements. Whether you need strong, weather-resistant roofing or sleek, modern appliance panels, prepainted galvanized steel coils are a reliable and long-lasting solution.

For buyers, considering factors such as zinc coating, paint type, and desired thickness is crucial to ensuring the right material for each application.

Manufacturing standards

Prepainted Galvanized Steel Coils (PPGI) are manufactured according to strict international and regional standards to ensure quality, durability, and performance in various applications. Below are the key manufacturing standards that govern the production of PPGI coils:

1. ASTM Standards (American Society for Testing and Materials)

• ASTM A653/A653M: This standard specifies the requirements for hot-dipped galvanized steel sheets, which are used as the base material for PPGI coils. It covers the coating process, zinc coating weight, and mechanical properties.

• ASTM A755/A755M: This standard specifically applies to prepainted galvanized steel, covering the performance requirements for the painted finish, including color adherence, weather resistance, and durability.

• ASTM D2244: This standard covers the method of evaluating the color differences of prepainted surfaces, ensuring color consistency and quality control.

• ASTM D4587: It outlines the standard test methods for accelerated weathering of the painted surface using UV light and water, which helps predict long-term performance in different environmental conditions.

2. EN Standards (European Standards)

• EN 10169: This European standard sets out requirements for continuously organic-coated (prepainted) steel products. It covers aspects such as coating thickness, surface quality, and coating adhesion, ensuring the long-term performance of PPGI in exterior applications.

• EN 10346: This standard is focused on hot-dip zinc-coated steel products for forming and drawing purposes, which is often the base material used in prepainted galvanized steel coils. It outlines the chemical composition, mechanical properties, and zinc coating requirements.

3. ISO Standards (International Organization for Standardization)

• ISO 9001: This is a widely recognized quality management standard. Manufacturers of PPGI coils often comply with ISO 9001 to ensure consistent product quality, continuous improvement, and customer satisfaction through rigorous quality control processes.

• ISO 12944-6: This standard covers the protection of steel structures through the use of organic paint systems. It includes guidelines for selecting appropriate paint coatings for prepainted galvanized steel to ensure long-lasting corrosion protection.

4. JIS Standards (Japanese Industrial Standards)

• JIS G3312: This standard covers prepainted hot-dip galvanized steel sheets and strips. It outlines specific requirements for the type of base steel used, the zinc coating process, and the paint layer application. The standard is widely used in Asia for the manufacturing of PPGI coils.

• JIS G3302: Focuses on hot-dip zinc-coated steel sheet, which is the base material used in the production of prepainted galvanized steel. This standard ensures that the zinc coating is applied evenly and that the steel meets mechanical property requirements.

5. GBT Standards (Chinese National Standards)

• GBT 12754: This is China's national standard for prepainted galvanized steel sheets. It defines the technical requirements for production, including coating thickness, paint quality, and mechanical performance. It is widely followed by manufacturers in China for PPGI coil production.

• GBT 2518: Similar to international standards, this standard focuses on the requirements for hot-dip galvanized steel sheets and coils. It outlines the necessary properties such as zinc coating thickness and tensile strength, providing a high-quality base for prepainting.

6. AAMA Standards (American Architectural Manufacturers Association)

• AAMA 2605: This standard covers high-performance coatings, often used in architectural applications. It requires that the paint used in PPGI coils meets stringent performance criteria, such as fade resistance, chalking resistance, and gloss retention, especially in exterior building materials.

Key Quality Parameters Covered by These Standards

• Zinc Coating Thickness: Determines the level of corrosion resistance. Standards specify the minimum and maximum zinc coating weights (e.g., Z40, Z120, Z275, etc.) to ensure the steel’s protection against rust and environmental damage.

• Paint Coating Thickness: Standards outline the necessary thickness of paint layers (both top and back coatings) to provide adequate protection, durability, and aesthetic appeal. Typical top coatings range from 15 to 25 microns, while back coatings are usually 5 to 10 microns.

• Adhesion: Adhesion standards ensure that the paint coating sticks firmly to the galvanized steel substrate, preventing peeling, blistering, or flaking, especially in harsh environmental conditions.

• Weather Resistance: Standards such as ASTM and ISO require PPGI coils to undergo accelerated weathering tests to assess their resistance to UV radiation, moisture, and temperature changes. These tests help predict the material’s lifespan and durability in outdoor environments.

• Corrosion Resistance: Standards like ISO 12944 and ASTM A755 ensure that the PPGI coils provide superior corrosion protection, especially for roofing, cladding, and other exterior applications.

Manufacturers of prepainted galvanized steel coils follow a range of international standards to ensure their products meet high-quality expectations. Standards like ASTM, EN, ISO, JIS, and GBT govern the production, coating, and performance of PPGI coils, ensuring they offer long-lasting durability, corrosion resistance, and aesthetic appeal. When selecting prepainted galvanized steel coils for your project, it's essential to ensure the product complies with the relevant standards to ensure safety, reliability, and longevity in your application.

Prepainted Galvanized Steel Coils (PPGI) are a highly versatile and durable material used across industries such as construction, automotive, and home appliances. These coils combine the corrosion resistance of galvanized steel with the aesthetic appeal of a painted surface, making them ideal for applications requiring both protection and visual appeal. Available in various thicknesses, widths, and finishes, PPGI offers excellent weather resistance, UV protection, and long-lasting performance. Adhering to international standards like ASTM, EN, ISO, and JIS, PPGI coils meet strict quality requirements for tensile strength, zinc coating, and paint adhesion. With their broad range of applications, including roofing, wall cladding, and appliance panels, Prepainted Galvanized Steel Coils are a cost-effective solution for projects that require both functionality and design flexibility. Additionally, they are classified under HS code 72107010 for international trade, ensuring compliance with global export and import regulations.