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PPGI Coil is manufactured by applying high-performance paint coatings to galvanized steel, providing excellent corrosion resistance, weather durability, and decorative appearance. It combines the strength of galvanized steel with a durable color-coated finish, making it suitable for both architectural and industrial applications.
Widely used in roofing systems, wall cladding, home appliances, sandwich panels, and industrial buildings requiring long-lasting protection and attractive surface finishes.
PPGI coil products (prepainted galvanized steel coils, color-coated GI coils, architectural prepainted steel sheets, and decorative metal rolls) represent essential high-performance materials engineered for long-term corrosion resistance, atmospheric durability, and versatile architectural appeal. Manufactured by applying multi-layer organic paint coatings onto hot-dip galvanized steel substrates, these color-coated steel coils combine the superior mechanical tensile strength of structural steel with the sacrificial protection of zinc and baked enamel finishes.
At XQJ Metal, we manufacture and export premium-grade PPGI coil inventory adhering strictly to international engineering standards, including ASTM A755, EN 10169, JIS G3312, and GB/T 12754 specifications. Our production capabilities feature substrate zinc coating weights from Z30 to Z275 g/m², total paint film thicknesses from 15µm to 35µm, and an extensive selection of custom RAL color finishes.
| Technical Parameter | Standard Commercial Range | Available Options & Customization |
| Substrate Type | Hot-Dip Galvanized Steel (GI Substrate) | DX51D+Z, S280GD, S350GD, Commercial / Structural |
| Zinc Coating Weight | Z30 to Z275 g/m² | Equal coating or differential zinc layer thickness |
| Coil Thickness Range | 0.12mm to 1.20mm | Tolerance ±0.02mm (High-Precision Cold Formed) |
| Coil Width Options | 600mm to 1250mm | Standard 914mm, 1000mm, 1200mm, 1250mm, or Slit Strip |
| Paint System Options | Topcoat: 15–30µm | Back: 5–15µm | PE (Polyester), SMP, HDP, PVDF Resin Systems |
Every PPGI coil produced at XQJ Metal undergoes a continuous chemical prepainting line ensuring uniform adhesion and surface smoothness:
Choosing the correct organic paint system for a PPGI coil depends on environmental exposure, UV intensity, and required service life:
Our heavy-duty PPGI coil supplies are processed into diverse finished products across global engineering sectors:
To guarantee complete compliance with international engineering specs, XQJ Metal implements rigorous quality control checks across every master PPGI coil batch:
Q1: What is the main difference between PPGI coil and PPGL coil?
A: PPGI coil utilizes a pure hot-dip galvanized steel substrate (100% Zinc), whereas PPGL coil uses a galvalume substrate (55% Aluminum, 43.4% Zinc, 1.6% Silicon). PPGL offers higher temperature resistance and longer cut-edge corrosion protection, while PPGI provides excellent cost-efficiency and ease of roll forming.
Q2: Can XQJ Metal provide slitting, embossing, or protective film coating on PPGI coils?
A: Yes, we offer narrow width coil slitting (down to 50mm), surface stucco/wood-grain embossing, and automatic 30–80µm PE protective film lamination to prevent surface scratching during transportation and profiling.
To request technical color swatch books, zinc coating weight charts, or factory-direct wholesale price quotes for PPGI coil products, Contact Our Coated Steel Sales Team today.
Our materials support a wide range of construction and infrastructure projects
PPGI Coil is manufactured by applying a protective paint coating over galvanized steel, providing enhanced weather resistance and decorative appearance. Galvanized Steel Coil relies only on a zinc coating and is typically selected for applications where appearance is less important.
Different paint systems are suitable for different environments. PE is commonly used for general applications, while SMP, HDP, and PVDF provide improved weather resistance and long-term color stability for harsh outdoor conditions.
Yes. We supply PPGI coils in standard RAL colors as well as custom color matching according to project specifications. Protective film and customized surface finishes are also available.
It offers excellent resistance to seawater corrosion and maintains strength in humid and salt-rich conditions.
No. Strength is achieved through strain hardening rather than heat treatment.
Yes. It provides excellent weldability for structural fabrication.
Yes, it is commonly applied in tanks and pressure equipment.
Yes. It provides higher strength compared with most non-heat-treated aluminum alloys.
Yes. Thickness, width and temper can be adjusted based on project demand.
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