Premium Prepainted Galvanized (PPGI) & Galvalume (PPGL) Roofing Sheets engineered with high-durability coatings (PE, SMP, HDP, PVDF) for superior UV resistance and long-lasting weatherability. Produced to meet ASTM A755, EN 10169, and JIS G3312/G3322 standards.
Substrate & Standards: PPGI & PPGL | ASTM A755, EN 10169, JIS G3312 / G3322
Dimensions & Paint: Thickness 0.14–0.8 mm | Top Coat 15–25 µm / Back 5–10 µm (PE/SMP/PVDF)
Profiles & Colors: Corrugated, Trapezoidal (IBR), Tile Profile | Full RAL Chart & Sample Matching
Primary Applications: Industrial, Commercial & Residential Roofing and Wall Cladding
Authentic Steel is a premier global prepainted galvanized roofing sheet supplier, manufacturer, and exporter of high-durability PPGI and PPGL roof panels designed for residential, commercial, industrial, and agricultural building enclosures. By combining high-tensile structural steel substrates with advanced multi-layer continuous coil coating technology, our color coated roofing sheet products deliver superior atmospheric corrosion resistance, excellent UV stability, and long-lasting aesthetic appeal.
Our prepainted galvanized steel sheets (PPGI) utilize a hot-dip zinc substrate for cost-effective corrosion protection, while prepainted galvalume steel sheets (PPGL) feature a 55% aluminum-zinc alloy substrate that offers up to four times the atmospheric service life. All products strictly conform to international engineering standards, including ASTM A755/A755M, JIS G3312, EN 10169, and GB/T 12754.
Substrates & Coating Mass: Hot-Dip Galvanized (PPGI: Z30–Z275 g/m²) and Galvalume Steel Substrate (PPGL: AZ30–AZ150 g/m²)
Dimensional Range: Thickness from 0.12 mm to 0.80 mm; Width from 600 mm to 1,250 mm; Custom cut-to-length sheet leveling
Paint Systems & Thickness: Top coat 15–25 µm, back coat 5–12 µm (PE, HDP, SMP, PVDF) applied via dual-coat / dual-bake continuous lines
Profile Geometries: Classic corrugated prepainted roofing sheet (sinusoidal wave profile), trapezoidal box-rib panels, and architectural step tile profiles
Color & Customization: Full RAL color chart, specialized textures (matt, wrinkle, high-gloss, wood grain), and optional 30–80 µm PE protective film lamination
Quality Certification: Official EN 10204 3.1 Mill Test Certificates (MTC) verifying paint dry film thickness (DFT), coating mass, and mechanical properties
Commercial Quality (DX51D / CS Grade): GB TDC51D+Z/AZ | ASTM A755 CS Type A/B/C | EN 10169 DX51D+Z/AZ | JIS G3312 CGCC (Ideal for general roofing, wall cladding, and architectural trims)
Lock-Forming & Deep-Drawing Quality (DX52D / DX53D): GB TDC52D/TDC53D | ASTM A755 LFQ/DS | EN 10169 DX52D/DX53D | JIS G3312 CGCD (Ideal for complex flashing and deep-drawn roof accessories)
High-Strength Structural Quality (S280GD–S550GD): GB TS280GD–TS550GD | ASTM A755 SS Grade 33 to 80 | EN 10169 S280GD–S550GD | JIS G3312 CGC440/CGC570 (Ideal for wide-span industrial plant roofing)
Regular Polyester (PE): Economical choice with good flexibility and adhesion for standard outdoor building panels and interior walls.
High-Durable Polyester (HDP) & SMP: High chalking resistance, thermal endurance, and anti-fading performance for tropical, high-humidity, or strong UV environments.
PVDF Coated Prepainted Roofing Sheet: Premium fluorocarbon system offering unmatched chemical resistance and 20+ years service life in severe coastal, marine, or industrial zones.
Quality assurance is embedded in every manufacturing batch through rigorous laboratory trials, including coating thickness checks, T-bend flexibility testing (0T–2T), cross-hatch paint adhesion trials, and neutral salt spray testing (NSS). Material Test Certificates (MTC EN 10204 3.1) and third-party inspections (SGS, Bureau Veritas) are provided standard.
In addition to precision cut-to-length ready-to-install sheets, we supply raw prepainted coils (PPGI/PPGL coils, 3–24 MT per coil) with custom longitudinal slitting for regional profiling factories seeking competitive pricing and supply chain flexibility. All shipments receive heavy-duty ocean export packaging: moisture-proof plastic wrapping, anti-corrosive VCI paper, protective steel edge guards, and heavy steel strapping on sturdy wooden pallets.
Contact Us
Partner with a trusted manufacturer: contact our technical export specialists today to request free color swatch samples, physical profile catalogs, and real-time factory-direct pricing for your upcoming commercial shipments!
WhatsApp: +86 137 8227 9845
Email: alice@authsteel.com
