PPGL Prepainted Galvalume Steel Coil
PPGL (Prepainted Galvalume) steel coil with superior corrosion resistance. Galvalume (Al-Zn) substrate with PE, SMP, HDP, PVDF paint. Thickness 0.12-1.2mm, width 600-1250mm. Ideal for high-end roofing, cladding in harsh environments. MTC provided.
| Material | Prepainted Hot-Dip Galvalume Steel (GL Substrate) |
|---|---|
| Grade / Standard | TDC51D+AZ / SGLCC / DX51D+AZ |
| Thickness | 0.12mm - 1.2mm |
| Width | 600mm - 1250mm |
| Inner Diameter (ID) | 508mm / 610mm |
| Coil Weight | 3-6 Tons |
| Delivery Condition | hot_rolled / cold_rolled |
| Surface Treatment | bare / shot_blasting / coated |
| MOQ | 5 Tons per color |
| Delivery Time | 15-30 Days |
| Loading Port | Tianjin / Shanghai / Qingdao |
Overview of PPGL Prepainted Galvalume Steel Coil
PPGL (Prepainted Galvalume) steel coil is a high-performance coated steel product, consisting of a Galvalume (GL) steel substrate that is pre-treated and coated with multiple layers of organic paint on a continuous coil-coating line. The Galvalume substrate, with its 55% Aluminum-Zinc alloy coating, provides superior corrosion resistance compared to traditional galvanized steel. When combined with a durable paint system, PPGL offers the ultimate in longevity, aesthetics, and performance. Specified under standards like JIS G3322, EN 10169, and ASTM A755, PPGL is the premium choice for applications demanding the highest level of weather and corrosion protection.
The paint system typically includes a primer and a topcoat, with options like Polyester (PE), Silicon Modified Polyester (SMP), High-Durability Polyester (HDP), and Polyvinylidene Fluoride (PVDF). This combination makes PPGL the ideal material for high-end architectural projects, coastal construction, and industrial applications where long-term durability is paramount.
Key Features and Paint Systems
The exceptional performance of PPGL coil stems from its advanced multi-layer structure. It starts with a superior hot-dip Galvalume (GL) steel substrate (Al-Zn coated). This is followed by a chemical pre-treatment, a corrosion-resistant primer, and a final topcoat that determines the color, gloss, and environmental resistance. Standard paint systems include:
– **Polyester (PE):** A cost-effective choice for general use, offering good formability and a wide color selection. Suitable for interiors and mild exteriors.
– **Silicon Modified Polyester (SMP):** Offers better durability, color, and gloss retention than PE, making it a good choice for standard roofing and cladding.
– **High-Durability Polyester (HDP):** Provides excellent color retention and chalking resistance, offering performance close to PVDF at a more competitive cost. Ideal for premium construction.
– **Polyvinylidene Fluoride (PVDF):** The ultimate performance coating, delivering outstanding resistance to UV radiation, chemicals, and fading. It is the standard for monumental architecture and buildings in harsh coastal or industrial environments, with warranties often exceeding 20 years.
Coils can be supplied with a protective plastic film to prevent damage during fabrication. Finishes are available in various gloss levels and textures, including smooth, wrinkled, and embossed patterns.
Main Applications of PPGL Steel Coil
Thanks to its superior corrosion resistance, PPGL coil is the preferred material for high-performance building systems. It is roll-formed into architectural roofing, standing seam roofs, insulated sandwich panels, and facade cladding for commercial buildings, airports, stadiums, and high-end residential projects, especially in coastal and industrial areas.
The appliance industry uses PPGL for premium products requiring long life and a flawless finish, such as outdoor air conditioning units and water heater casings. It is also used in manufacturing solar panel frames, cold storage facilities, and agricultural buildings where chemical and moisture resistance is critical. In essence, PPGL is chosen wherever durability and long-term aesthetic appeal are non-negotiable.
Why Choose Us for PPGL Prepainted Coil
Shandong Tanglu Metal Material Co., Ltd. specializes in producing top-tier PPGL coils. We start with premium Galvalume (GL) steel substrates (AZ coating from AZ50 to AZ180) from leading mills. Our state-of-the-art coil coating lines use internationally recognized paint brands like Beckers, Valspar, and KCC to ensure exceptional color consistency and longevity. Every PPGL coil undergoes a battery of quality tests, including color matching (Delta-E), gloss, paint thickness, T-bend adhesion, hardness, and extended salt spray and UV exposure tests to validate its superior performance.
We offer a full spectrum of RAL colors and custom color development, along with all major paint systems (PE, SMP, HDP, PVDF). With a wide range of specifications and extensive export experience to over 80 countries, we are a trusted partner for demanding projects. Each coil is shipped with a comprehensive Mill Test Certificate (MTC) and can be protected with a quality adhesive film.
📐 Dimension & Size Table
| Thickness (mm) | Width (mm) | Paint System | Base Metal (GL) |
|---|---|---|---|
| 0.12-0.25 | 600-1250 | PE | AZ30-AZ80 |
| 0.25-0.40 | 600-1250 | PE, SMP | AZ50-AZ100 |
| 0.40-0.60 | 600-1250 | SMP, HDP | AZ70-AZ150 |
| 0.60-0.80 | 600-1250 | HDP, PVDF | AZ100-AZ150 |
| 0.80-1.20 | 600-1250 | PVDF | AZ120-AZ180 |
* Custom sizes available upon request. Tolerances per relevant international standards.
🔬 Chemical Composition
| Element | Min | Max | Display Value | Note |
|---|---|---|---|---|
| C | - | 0.12 | ≤0.12 | Base Metal: DX51D+AZ per EN 10346 |
| Si | - | 0.50 | ≤0.50 | Base Metal |
| Mn | - | 0.60 | ≤0.60 | Base Metal |
| Al (Substrate) | 55.0 | - | ≈55.0% | Galvalume coating composition |
| Zn (Substrate) | 43.4 | - | ≈43.4% | Galvalume coating composition |
* Chemical composition may vary by heat, thickness and specification. Please refer to the actual mill test certificate.
⚙️ Mechanical Properties
| Property | Value | Unit | Test Condition |
|---|---|---|---|
| Tensile Strength | 270-500 | MPa | Base metal properties |
| Elongation | ≥20 | % | Base metal properties |
| Top Coat Paint Thickness | 15-25 | μm | Standard PE/PVDF top coat |
| Primer Thickness | 5-8 | μm | Standard epoxy/polyurethane primer |
| T-Bend Test | 0T - 3T | No cracking or peeling | |
| Pencil Hardness | ≥HB | ASTM D3363 | |
| Salt Spray Test (HDP) | ≥1000 | hours | ASTM B117, neutral |
| Salt Spray Test (PVDF) | ≥1500 | hours | ASTM B117, neutral |
* Values shown are minimum requirements unless otherwise stated.
📦 Commercial Information
| Packaging | Standard seaworthy export packing for PPGL coils. Each coil is wrapped with waterproof paper and PE film, with hardboard edge protectors on inner and outer edges. A full outer steel shell provides maximum protection. The coil is placed 'eye to sky' or 'eye to wall' on a wooden pallet and securely strapped with steel bands. Each package is clearly labeled with product details including color, paint type, and specifications. |
|---|---|
| Payment Terms | T/T (Telegraphic Transfer),L/C (Letter of Credit) |
| Price Term | FOB,CFR,CIF,EXW |
| Supply Capacity | 20,000 Tons/Month (PPGI & PPGL) |
| Loading Port | Tianjin / Shanghai / Qingdao |
Why Choose Our PPGL Prepainted Galvalume Steel Coil?
Ultimate Corrosion Resistance
Built on a Galvalume (55% Al-Zn alloy) substrate, PPGL offers 2-4 times the corrosion resistance of PPGI, providing exceptional longevity and a superior return on investment.
Premium Architectural Paints
Available with high-performance paint systems like HDP and PVDF, providing outstanding color retention, chalk resistance, and warranties of 20 years or more, even in severe environments.
Ideal for Harsh Environments
The combination of a Galvalume substrate and PVDF paint makes PPGL the number one choice for coastal, industrial, and high UV areas where other materials would quickly fail.
Aesthetic Excellence
Available in the full RAL color spectrum, custom colors, and various finishes (matte, high-gloss, textured) to meet the most demanding architectural design requirements.
Quality Assured & Certified
Every coil is produced under strict quality control and shipped with a full Mill Test Certificate (MTC) verifying substrate, coating weight, paint thickness, and performance test results.
🏭 Applications of PPGL Prepainted Galvalume Steel Coil
PPGL color coated steel coil is the definitive choice for projects where performance and aesthetics are paramount. Its primary application is in high-end architectural systems, including long-life metal roofing, curtain walls, and facade panels for prestigious commercial, public, and residential buildings. Its superior resistance to salt spray and chemicals makes it indispensable for structures in coastal and industrial zones. PPGL is also used to manufacture durable goods like outdoor HVAC units, solar energy equipment, and modern agricultural facilities, ensuring a long, maintenance-free service life with a lasting, vibrant appearance.
📋 Quality & Certification
Our Certifications
- ✅ ISO 9001:2015
- ✅ CE Marking
- ✅ ABS
- ✅ DNV GL
- ✅ Lloyd's Register (LR)
- ✅ Bureau Veritas (BV)
- ✅ SGS Certified
- ✅ NK
- ✅ RINA
Mill Certificate Type
- 📋 EN 10204 3.1
- 📋 Original Mill Certificate
- 📋 Third Party Inspection Available
❓ Frequently Asked Questions
What is PPGL steel coil?
PPGL stands for Prepainted Galvalume. It is a steel coil with a hot-dip Galvalume (GL) steel base, which is coated with a 55% Aluminum-Zinc alloy. This superior substrate is then factory-painted with multiple layers of organic coating. PPGL offers the highest level of corrosion resistance and longevity among prepainted steel products.
What is the main difference between PPGL and PPGI?
The key difference is the metallic coating on the base steel. PPGL uses a Galvalume (GL) substrate (55% Al-Zn alloy), while PPGI uses a Galvanized (GI) substrate (99%+ Zinc). The aluminum in the GL coating provides long-term barrier protection, making PPGL significantly more resistant to corrosion and rust, especially in harsh environments. PPGL is the more durable, premium product.
Why is PVDF paint recommended for PPGL?
PVDF (Polyvinylidene Fluoride) is the highest-performance paint available. Combining it with a superior Galvalume substrate creates a product with maximum durability. The PVDF coating provides exceptional resistance to UV fading, chalking, and chemical attack, ensuring the building's color and finish last for decades. This synergy makes PVDF-coated PPGL the standard for high-value architectural projects.
Is PPGL more expensive than PPGI?
Yes, PPGL is typically more expensive than PPGI on a per-ton basis due to the higher cost of the Al-Zn alloy coating and the more advanced production process. However, its significantly longer service life (2-4 times that of PPGI) often makes it more cost-effective over the total life cycle of a building, as it reduces replacement and maintenance costs.
Can PPGL be used in coastal areas?
Absolutely. PPGL is the highly recommended material for coastal areas. The Galvalume substrate's excellent resistance to salt spray and atmospheric corrosion, especially when paired with a PVDF paint system, makes it far superior to PPGI for marine environments where salt-laden air can quickly degrade standard materials.
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PPGL Prepainted Galvalume Steel Coil
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