TJMC Steel is a professional Pre-Painted Galvanized Steel Coil manufacturer and global supplier, providing premium PPGI coils for roofing, wall cladding, household appliances, industrial buildings, sandwich panels and prefabricated steel structures.
Manufactured from high-quality hot-dip galvanized steel substrates and coated with advanced paint systems, our PPGI products combine excellent corrosion resistance, outstanding weatherability and an attractive decorative finish.
If your project also requires unpainted coated steel products, please explore our Galvanized Steel Coil or Galvalume Steel Coil product pages.
| Standard | JIS / EN / ASTM Standard |
| Sizes | Thickness:0.12mm-1.2mm |
| Width: 900mm-1250mm |
Parameter of Pre-Painted Galvanized Steel Coil
Pre-Painted Galvanized Steel Coil (PPGI Coil), also known as color coated galvanized steel coil, is manufactured by applying multiple protective paint layers onto a hot-dip galvanized steel substrate.
Compared with ordinary galvanized steel, PPGI offers:
Enhanced corrosion resistance
Excellent UV resistance
Decorative appearance
Long service life
Easy forming and fabrication
Low maintenance cost
PPGI coils are widely used in construction, roofing systems, cold storage panels, industrial buildings, agricultural facilities and household appliances.
Related resources:
| Standard | JIS / EN / ASTM Standard |
| Grades | SGCC / DX51D / S250GD |
| DX52D / DX53D / S280GD / S320GD / S350GD | |
| Base plate | Z60-Z275,AZ30-AZ150 |
| Painting thickness | Top side：10-20 microns |
| Primer：5-7 microns | |
| Back side：5-7 microns | |
| Spangle | Regular Spangle /Minimized spangle / Zero spangle |
| Sizes | Thickness: 0.2mm - 1.5mm |
| Width: 800mm,914mm,1000mm,1200mm,1250mm or other width | |
| Color | RAL color system or as per buyer’s color sample |
| Coil weight | 3ton to 8ton |
| Inner diameter | 508mm,610mm |
| Packing | Standard export packing,or as customer demands |
The paint system is one of the most important factors affecting the durability and appearance of PPGI products.
PE (Polyester)
Suitable for general roofing and wall applications with excellent cost performance.
SMP (Silicone Modified Polyester)
Provides improved UV resistance and weatherability for outdoor environments.
HDP (High Durability Polyester)
Designed for harsh climates requiring longer coating life.
PVDF (Polyvinylidene Fluoride)
Recommended for coastal, industrial and high-corrosion environments where maximum weather resistance is required.
For projects requiring metallic coatings without paint finishes, see Galvanized Steel Coil .
TJMC Steel supplies multiple surface finishes to satisfy different architectural and industrial applications.
Available finishes include:
Regular Gloss
Matt Finish
Wrinkle Finish
Textured Finish
Wood Grain Finish
Stone Pattern Finish
Customized Printed Pattern
Standard colors are produced according to the RAL Color System, while customized colors are also available.
For customers comparing coating solutions, visit PPGI vs PPGL .
PPGI coils are widely used in various industries due to their excellent durability and decorative performance.
Typical applications include:
Roofing Sheets
Wall Cladding
Sandwich Panels
Prefabricated Buildings
Industrial Warehouses
Agricultural Buildings
Garage Doors
Household Appliances
HVAC Equipment
Steel Ceilings
Storage Containers
Modular Buildings
Customers working on structural projects may also be interested in Structural Steel Products .
Choosing the appropriate pre-painted galvanized steel coil depends on several key factors.
1. Application Environment
Indoor projects generally require PE coatings, while coastal or industrial environments are better suited to PVDF or HDP coatings.
2. Zinc Coating Thickness
Higher zinc coatings (such as Z180 or Z275) provide better corrosion resistance and longer service life.
3. Paint System
Select the coating according to the required durability, UV resistance and maintenance expectations.
4. Steel Grade
DX51D and SGCC are commonly used for general construction, while higher-formability grades are suitable for deep drawing applications.
5. Color Requirements
RAL standard colors ensure consistency across large construction projects, while custom colors are available for brand-specific designs.
To better understand different coated steel products, refer to Color Coated Steel Products .
Each PPGI coil is produced under a strict manufacturing process to ensure stable coating performance and consistent quality.
Production steps include:
Steel Coil Preparation
Surface Cleaning
Chemical Pretreatment
Primer Coating
Oven Curing
Top Coat Application
Final Baking
Cooling
Inspection
Packing
The multi-layer coating system provides excellent adhesion, weather resistance and long-term protection.
TJMC Steel implements comprehensive quality control throughout production.
Inspection items include:
Coating Thickness
Zinc Coating Weight
Gloss Measurement
Color Consistency
Pencil Hardness Test
T-Bend Test
MEK Solvent Resistance
Salt Spray Test
Mechanical Properties
Dimensional Inspection
Mill Test Certificates and third-party inspections (SGS, BV) are available upon request.
To ensure safe transportation, all PPGI coils are packed according to international export standards.
Packaging options include:
Waterproof Paper
Plastic Film Protection
Steel Strapping
Edge Protectors
Wooden Pallets
Container Loading
Break Bulk Shipment
Customized packaging solutions are available depending on destination requirements.
TJMC Steel supplies high-quality Pre-Painted Galvanized Steel Coil for customers worldwide.
Our services include:
Factory Direct Pricing
Custom Dimensions
Multiple Paint Systems
Full RAL Color Options
Third-party Inspection
Fast Delivery
Export Documentation
Technical Support
Contact our sales team today to receive a quotation or request the latest product catalogue.
For additional coated steel products, please visit:
Steel Coil Thickness Chart（Steel Coil Thickness Chart，建议新增尺寸页）
Industries Using Steel
