PPGI Coil Supplier in China
Steel1Stop supplies PPGI (prepainted galvanized steel) coil for roofing, wall cladding, sandwich panels, appliances and industrial fabrication. Current published options include PE, SMP, HDP and PVDF paint systems, RAL and custom colors, multiple surface finishes, and galvanized substrates with different zinc coating levels. Send your substrate grade, size, zinc coating, paint system, color and quantity for a specification-based quotation.
What Is PPGI Coil?
PPGI is galvanized steel that receives surface pretreatment, primer and an organic topcoat in a continuous coil-coating process. The galvanized substrate provides metallic corrosion protection while the paint system adds color, weather resistance and application-specific surface performance.
For purchasing, the word “PPGI” alone is not enough. The final product should be specified by substrate grade, zinc coating, thickness, width, paint chemistry, paint thickness, color, gloss or texture, coil weight and intended application.
Information to include in your PPGI inquiry
- Finished-product standard or project specification
- Galvanized substrate grade
- Thickness and width
- Zinc coating mass/designation
- Paint system: PE / SMP / HDP / PVDF
- Topcoat and back-coat thickness
- RAL color or physical color sample
- Gloss, matte, wrinkle or patterned finish
- Quantity and destination
PPGI Coil Specifications
The table below uses the currently published Steel1Stop PPGI Steel Coil range. Final availability can vary by substrate grade, color, paint system and production route, so the order specification should be confirmed before purchase.
| Specification | Published Options | Buyer Note |
|---|---|---|
| Product | Prepainted galvanized steel coil (PPGI) | PPGI uses a zinc-coated galvanized steel substrate. PPGL uses an Al-Zn alloy-coated substrate and should be specified separately. |
| Substrate Grades | DX51D, DX52D, DX53D, SGCC, SGC340, SGC400 | Grade designation should be used together with the governing substrate standard. |
| Thickness | 0.12–2.0 mm | Not every paint/grade combination is available across the full published range. |
| Width | 600–1,500 mm | Include finished width and slitting requirement in the RFQ. |
| Zinc Coating | Z40–Z275 g/m² | Select zinc coating based on standard, exposure and expected service environment. |
| Paint Systems | PE, SMP, HDP, PVDF | Paint chemistry is one of the main drivers of durability, UV resistance and cost. |
| Paint Thickness | Top: 10–30 μm; Back: 5–15 μm | Specify primer/top/back coating requirements where project performance depends on film build. |
| Coil Weight | 3–10 tons | Confirm maximum coil weight for your handling and production line. |
| Coil ID | 508 mm / 610 mm | Include the required inner diameter when the line has a fixed uncoiler. |
| Surface Finish | Glossy, matte, wrinkled, wood grain, marble pattern | Patterned products should be confirmed by sample, image or approved reference where appearance is critical. |
| Color | RAL color chart or customized colors | For repeat orders, identify the approved color standard and acceptable color tolerance. |
PE vs SMP vs HDP vs PVDF PPGI Coatings
Paint type should be selected by exposure, design life, color-retention requirement, forming process and budget—not by color alone.
Polyester
A cost-efficient general-purpose coating with good flexibility and a broad color range. Commonly evaluated for indoor products and standard building applications where premium exterior durability is not required.
Silicone-Modified Polyester
Provides improved weather and color-retention performance compared with standard polyester, making it a common option for more demanding exterior building applications.
High-Durability Polyester
Designed for enhanced durability and fade resistance where buyers need performance above standard PE but do not necessarily require a fluoropolymer coating.
PVDF / Fluoropolymer
A premium exterior coating option used where long-term weathering, chemical resistance and color retention are important purchasing criteria.
RAL Colors, Gloss, Matte and Textured PPGI
PPGI is purchased for both protection and appearance. Color matching should therefore be treated as part of the technical specification, especially for roofing, wall panels, appliances and repeat-production orders.
Steel1Stop's published PPGI range includes RAL or customized colors plus glossy, matte, wrinkled and patterned finishes. For critical appearance requirements, send the RAL number, approved physical sample or visual reference with your inquiry.
Color RFQ checklist
- RAL number or approved color sample
- Gloss level or matte requirement
- Smooth, wrinkle or patterned surface
- Topcoat chemistry and film thickness
- Protective film requirement if applicable
- Batch consistency requirement for repeat orders
PPGI Coil Products
Steel1Stop currently lists standard prepainted galvanized steel coil and wrinkle PPGI coil. Use the products below for detailed product information, or send one RFQ for a custom color, coating, thickness or finish.
PPGI Coil Applications
Application should determine the substrate, zinc coating, paint system and film thickness. The same color does not mean two PPGI coils have the same durability or forming performance.
Roofing & Wall Cladding
PPGI is widely used as feedstock for corrugated roofing sheets, wall panels, trims and cladding. Exterior projects should specify coating and paint performance for the actual environment.
Sandwich Panels & Cold Rooms
Coil is used for insulated sandwich-panel facings where consistent color, surface, width and forming performance are important to continuous panel production.
Home Appliance Panels
Prepainted steel can be used for refrigerators, washing machines, air conditioners and enclosures when appearance, forming and repeatable color are key requirements.
Warehouses & Factory Buildings
PPGI roofing and wall products are common in warehouses and industrial facilities because they combine a coated metallic substrate with a finished colored surface.
Roll-Formed Profiles & Components
Buyers should specify the forming process and bend severity so the substrate grade and paint system can be checked before production.
Sheds, Barns & Enclosures
Color-coated steel can be used for roofing and enclosure systems where buyers need economical, prefinished material in repeat production.
PPGI Finished-Coil Standards vs Substrate Standards
One common purchasing mistake is to specify only the galvanized substrate standard while omitting the organic coating requirements. PPGI includes both the metallic-coated steel substrate and a paint system, so the order needs to define both where performance is important.
Common references
- ASTM A755/A755M — prepainted, hot-dip metallic-coated steel sheet for exterior building products
- EN 10169 — continuously organic-coated steel flat products
- ASTM A653/A653M — galvanized / galvannealed hot-dip steel substrate
- EN 10346 — continuously hot-dip coated steel flat-product substrate
What Affects PPGI Coil Price?
PPGI coil quotations should be compared on an equivalent technical specification. A low price can simply reflect a lower zinc coating, thinner paint film, cheaper paint chemistry or a different substrate grade.
Base Steel & Grade
Substrate grade and thickness influence both material cost and forming performance.
Zinc Coating
Z40 and Z275 do not have the same metallic coating mass, so quotations must be compared on equal coating specifications.
Paint Chemistry
PE, SMP, HDP and PVDF offer different performance and cost positions.
Paint Thickness
Topcoat, primer and back-coat film build can materially change product durability and price.
Color & Finish
Standard colors, special RAL colors, wrinkle finishes and patterned surfaces can affect production setup and MOQ.
Quantity & Delivery
Coil weight, order quantity, packaging, destination and Incoterm affect the final commercial offer.
How to Request a PPGI Coil Quote
A complete PPGI RFQ should define both the galvanized substrate and the organic coating system.
- Finished-product standard / project standard
- Substrate grade
- Thickness × width
- Zinc coating designation
- Paint type: PE / SMP / HDP / PVDF
- Primer / topcoat / back-coat thickness if specified
- RAL color or approved sample
- Gloss / matte / wrinkle / pattern
- Coil ID and maximum coil weight
- Total quantity
- Application
- Destination port / country
Have a Color, Paint System or Roofing Specification?
Send the exact PPGI requirement. Steel1Stop can review the published product options against your requested substrate, zinc coating, paint, color, dimensions, quantity and destination.
PPGI Coil FAQ
What does PPGI mean?
PPGI means prepainted galvanized steel. A galvanized zinc-coated steel substrate is surface-treated, primed and coated with an organic finish such as PE, SMP, HDP or PVDF.
What is the difference between PPGI and galvanized steel coil?
Galvanized coil has a metallic zinc coating but no finished color paint system. PPGI starts with galvanized steel and adds pretreatment, primer and a colored organic coating, providing a finished decorative surface plus additional environmental protection.
What is the difference between PPGI and PPGL?
PPGI uses galvanized zinc-coated steel as the substrate. PPGL uses an aluminum-zinc alloy-coated substrate. They can use similar paint systems but should not be treated as the same product when the project specifies substrate chemistry.
Which PPGI paint is best for roofing?
The correct choice depends on climate, UV exposure, corrosion environment, design life and budget. PE is commonly used for standard requirements; SMP and HDP provide enhanced durability; PVDF is a premium option where long-term exterior weathering and color retention are key requirements.
Can PPGI coil be supplied in custom RAL colors?
Steel1Stop's published PPGI range includes RAL color-chart and customized color options. For critical matching, provide the RAL number or an approved physical sample and confirm the required gloss and finish.
What zinc coating is available for PPGI?
Steel1Stop's currently published PPGI Steel Coil page lists Z40–Z275 g/m². Final coating availability depends on substrate grade, size and order specification.
Can you supply wrinkle or textured PPGI?
Steel1Stop currently lists a Wrinkle PPGI Coil product in addition to standard PPGI coil. Send the required texture, color, thickness, width and quantity for confirmation.
What information affects PPGI coil price most?
The main technical price drivers include steel thickness and width, substrate grade, zinc coating mass, paint chemistry, paint thickness, color/finish, coil weight and total quantity. Delivery terms and destination also affect the commercial offer.
Can PPGI coil be slit or supplied as sheet?
Steel1Stop also lists PPGI sheet and color-coated sheet products. If you need slit coil or cut sheet, provide the finished width or sheet size together with the required tolerance and packaging.
Request PPGI Coil by Substrate, Zinc Coating, Paint and Color
Send your thickness, width, substrate grade, zinc coating, paint system, RAL color, quantity and destination. A complete specification makes it easier to compare the correct PPGI supply option.