High Durability HDP PPGI Steel Coil – Industrial & Coastal Grade
Product Overview
High Durability Polyester (HDP) coated PPGI steel coil is a premium construction coating product designed for severe outdoor environments. Built on minimized-spangle galvanized steel substrate with heavy zinc coating, this S250GD structural grade delivers superior UV resistance, industrial pollution resistance and structural performance compared with standard PE PPGI. It is the preferred solution for industrial plant cladding, coastal building roofing and long-life infrastructure projects requiring 10+ years of maintenance-free service.
Why Choose CNB HDP PPGI?
Our HDP PPGI products use high-performance weather-resistant polyester resins from top international paint manufacturers, formulated with advanced UV stabilizers and anti-oxidation additives. We adopt precise coating weight control and curing temperature management to ensure consistent weathering performance and paint adhesion. Every batch of HDP product undergoes accelerated weathering testing and salt spray testing to verify long-term performance, making it reliable for harsh industrial and coastal environments.
Key Specifications
| Item | Specification |
|---|---|
| Product Name | High Durability HDP Pre-painted Galvanized Steel Coil |
| Base Substrate | Hot-dip Galvanized Steel (GI), minimized spangle |
| Paint System | High Durability Polyester (HDP) – Topcoat + Primer + Backcoat |
| Paint Film Thickness | Top 20–22μm / Primer 5–7μm / Back 5–7μm |
| Zinc Coating Mass | Z120 – Z275g/m² (double side), Z180 recommended for coastal |
| Steel Grade | S250GD |
| Thickness Range | 0.4mm – 2.0mm |
| Standard Widths | 1000mm, 1200mm, 1250mm, 1500mm |
| Coil Inner Diameter | 508mm / 610mm |
| Coil Weight | 4MT – 8MT per coil |
| Surface Finish | Semi-gloss / matte option |
| Color System | RAL full range, custom industrial colors available |
| Applicable Standards | ASTM A755, EN 10169, JIS G3312 |
| Typical Service Life | 10–15 years (industrial / coastal environment) |
Core Advantages
- Superior weather resistance: HDP resin with UV stabilizers delivers 2–3x longer life than standard PE in harsh outdoor environments.
- Heavy zinc protection: Heavy galvanized substrate provides excellent cut-edge corrosion protection for long-term outdoor service.
- Structural strength: S250GD high-strength base supports load-bearing cladding and roofing systems.
- Industrial pollution resistance: Resists acid rain, industrial fumes and atmospheric pollution better than standard polyester.
- Proven long-term performance: Validated by accelerated weathering and salt spray testing for 10+ year service life.
Applications
This HDP PPGI coil is widely used for industrial plant exteriors, factory cladding, coastal building roofing, power station envelopes, mining facilities, agricultural buildings, warehouse exteriors and large-span steel structure cladding.
Get a Quotation
We supply HDP PPGI in a full range of zinc coatings, strength grades and custom colors for industrial and coastal projects. Accelerated weathering test reports and project-specific material recommendations are available upon request. Contact our industrial construction team for a tailored quotation and technical support.
