Nakoda Steel Industry – PPGI/PPGL Coils & Sheets Manufacturer
Nakoda Steel Industry , headquartered in Shandong, China, is a leading global manufacturer of Pre-Painted Galvanized Steel (PPGI) and Pre-Painted Galvalume Steel (PPGL) coils and sheets. With a focus on innovation, durability, and sustainability, our products are engineered to meet the highest international standards, including ASTM, DIN, GB, and JIS3312. Whether for construction, solar energy, home appliances, or industrial applications, our PPGI/PPGL solutions offer unmatched corrosion resistance, aesthetic versatility, and long-term performance.
Understanding PPGI & PPGL
PPGI (Pre-Painted Galvanized Steel) and PPGL (Pre-Painted Galvalume Steel) are advanced coated steel products designed for longevity and visual appeal.
- PPGI: Manufactured using hot-dip galvanized steel as the substrate, PPGI undergoes a multi-step coating process to achieve vibrant colors and robust protection against environmental factors.
- PPGL: Utilizes galvalume steel (a zinc-aluminum alloy-coated substrate) for enhanced corrosion resistance, making it ideal for coastal or high-humidity environments.
- Key Differences:
- PPGI: Superior paint adhesion and cost-effectiveness for general-purpose applications.
- PPGL: Higher resistance to saltwater and industrial pollutants due to the aluminum-zinc alloy base.
Advanced Manufacturing Process
Our PPGI/PPGL production process ensures consistent quality and performance:
- 1. Substrate Preparation:
- Galvanized/Galvalume Steel Coils: Pre-treated to remove impurities and ensure optimal surface adhesion.
- Chemical Cleaning: Alkaline degreasing and rinsing to eliminate oils and residues.
- 2. Primer Coating:
- Epoxy Primer: Applied as a base layer to enhance corrosion resistance and paint adhesion.
- 3. Top Coat Application:
- Polyester (PE) or Silicon-Modified Polyester (SMP): Offers UV resistance, color retention, and flexibility.
- High-Durability Coatings: Optional PVDF (Polyvinylidene Fluoride) for extreme weather conditions.
- 4. Curing & Cooling:
- Baking: Coils pass through high-temperature ovens (200–250°C) to solidify the coating.
- Controlled Cooling: Ensures uniform texture and prevents warping.
Detailed Product Specifications
| Parameter | PPGI/PPGL Specifications | |
| Technical Standards | ASTM, DIN, GB, JIS3312 | |
| Grades | SGCC, SGCD (Standard) | Custom grades available upon request. |
| Thickness | 0.13–2.0 mm (Wide range for lightweight panels to heavy-duty structural components). | |
| Width | 600–1500 mm (Customizable to fit project requirements). | |
| Zinc Coating | 40–275 g/m² (Adjustable based on corrosion resistance needs). | |
| Colors | Full RAL color chart support (e.g., RAL 9003 Signal White, RAL 7021 Black Grey). Custom colors matched to samples. | |
| Coil Weight | 3–8 tons per coil (Standard) | Bulk orders optimized for logistics efficiency. |
Performance Tests
- Hardness: ≥F (Rockwell Scale) for scratch resistance.
- T Bend Test: ≥3T (Ensures coating flexibility without cracking).
- Reverse Impact: ≥9J (Measures resistance to mechanical stress).
- Salt Spray Resistance: ≥500 hours (Simulates decades of coastal exposure).
RAL Color Options
| Neutral Tones | Vibrant Hues | Industrial Shades |
| RAL 9002 (Grey White) | RAL 2002 (Orange) | RAL 7021 (Black Grey) |
| RAL 9010 (Pure White) | RAL 5015 (Sky Blue) | RAL 8017 (Chocolate Brown) |
| RAL 7035 (Light Grey) | RAL 3013 (Tomato Red) | RAL 6005 (Moss Green) |
| Custom Colors: Perfectly matched to Pantone codes or client-provided samples. |
Applications Across Industries
Our PPGI/PPGL coils and sheets are trusted in diverse sectors:
- 1. Building & Construction
- Roofing & Cladding: Lightweight, weather-resistant sheets for residential and commercial buildings.
- Wall Panels: Aesthetic and durable solutions for facades and partitions.
- Structural Components: Used in warehouses, airports, and stadiums.
- 2. Home Appliances
- Refrigerators: Side panels and doors with scratch-resistant finishes.
- Washing Machines & Air Conditioners: Durable exteriors resistant to humidity and chemicals.
- 3. Solar Energy
- Solar Panel Backsheets: Reflective coatings to enhance energy efficiency.
- Mounting Systems: Corrosion-resistant frames for long-term outdoor use.
- 4. Transportation
- Vehicle Interiors: Lightweight panels for buses, trailers, and railcars.
- Cargo Containers: Protective coatings to withstand harsh transit conditions.
- 5. Furniture & Decor
- Cabinet Systems: Sleek, customizable finishes for modern interiors.
- Outdoor Furniture: Weatherproof coatings for patios and gardens.
Why Choose Nakoda’s PPGI/PPGL?
- 1. Decades-Long Durability:
- Resists UV rays, acid rain, and temperature fluctuations (-50°C to 120°C).
- Ideal for coastal regions, industrial zones, and extreme climates.
- 2. Aesthetic Versatility:
- Over 20 standard RAL colors + bespoke options for branding or design needs.
- Matte, glossy, or textured finishes available.
- 3. Eco-Friendly Production:
- Recyclable steel substrates and low-VOC coatings.
- Energy-efficient manufacturing reduces carbon footprint.
- 4. Global Compliance:
- Certifications include ISO 9001, RoHS, and REACH.
- Compliant with EU and North American environmental regulations.
Packaging & Logistics
To ensure product integrity during transit, we use sea-worthy packaging:
- Inner/Outer Edge Protection: Galvanized metal fluted rings prevent edge damage.
- Waterproof Barriers: Multi-layer waterproof paper guards against moisture.
- Reinforcement:
- 4 steel eye bands + 4 circumferential bands for coil stability.
- Custom crating for oversized orders or fragile finishes.
- Labeling: Barcodes and moisture indicators for real-time tracking.
Quality Assurance & Testing
Every batch undergoes rigorous quality checks:
- 1. Coating Thickness: Measured via ultrasonic sensors to ensure uniformity.
- 2. Adhesion Tests: Cross-cut tape tests validate paint bonding strength.
- 3. Salt Spray Chambers: Simulate decades of coastal exposure in 500+ hours.
- 4. Bend & Impact Tests: Ensure flexibility and resistance to mechanical stress.
Industry Leadership
- Annual Capacity: 240,000 tons across 2 state-of-the-art production lines.
- Custom Solutions:
- Tailored Dimensions: Non-standard widths, lengths, and thicknesses.
- Specialty Coatings: Anti-bacterial, anti-fingerprint, or fire-retardant options.
- Global Reach: Exports to 50+ countries with partnerships in construction, automotive, and renewable energy sectors.
Contact Nakoda Steel Industry Today!
For PPGI/PPGL coils and sheets that blend durability, aesthetics, and compliance, partner with us. Our team in Shandong, China, delivers tailored solutions, competitive pricing, and seamless logistics to meet your project’s unique demands.