Color-Coated Galvanized Steel · PE / SMP / HDP / PVDF · RAL Color Selection
STEEL GRADE / ZINC / PAINT / COLOR
Order prepainted galvanized steel coil for roll-forming, roofing panels, cladding and general fabricated products. Specify the base metal thickness, zinc coating mass, top and reverse paint systems, color reference, coil width and finish so your quotation matches your end use.
Match substrate grade, zinc coating, paint system, color and finished coil dimensions before comparing supplier offers.
| Parameter | Procurement specification |
|---|---|
| Product name | PPGI Steel Coil — prepainted hot-dip galvanized steel coil |
| Substrate | Hot-dip zinc-coated (GI) steel such as DX51D+Z, DX52D+Z or appropriate forming / structural grade |
| Applicable standards | EN 10169:2022; ASTM A755/A755M-18(2024); JIS G 3312:2024 by contract |
| Metallic coating | Zinc coating type and total both-side mass, such as Z100 / Z140 / Z180 / Z275, to the selected substrate standard |
| Paint system | PE (polyester), SMP, HDP and PVDF options; actual resin formulation and performance are mill-/system-specific |
| Illustrative BMT range | 0.30–1.20 mm for quotation screening; confirm production range, tolerances and whether thickness refers to base metal or finished coated sheet |
| Illustrative width range | 600–1,250 mm for initial inquiry; other widths subject to mill confirmation |
| Top-side dry film | Typical procurement examples 20–25 μm total; actual primer and finish film specified separately |
| Reverse-side film | Typical procurement examples 5–12 μm; include reverse primer / backcoat schedule in order |
| Color and gloss | RAL reference or physical approved sample, plus gloss target and agreed color tolerance |
| Coil geometry | Coil inside diameter, maximum outside diameter, net coil weight, edge condition and packaging method |
| Product form | Full-width master coil, slit coil or cut sheet by confirmed availability and processing schedule |
The sizes and film builds above are inquiry examples rather than blanket manufacturing guarantees. Mill limits, mechanical properties and coating classification will be confirmed on the quotation and MTC.
Understand the protective layers so you can select a suitable material for profiling, forming and its intended environment.
Colored polyester, SMP, HDP or PVDF finish; provides the specified appearance and selected outdoor performance.
Adhesion and corrosion-control system between organic topcoat and galvanized substrate.
Hot-dip galvanizing on both steel surfaces; coating mass is designated separately from the paint film.
Commercial, forming or structural grade selected for roll-forming and the project load requirements.
Backside organic layer configured for processing, handling or a specified service condition.
Specify zinc coating mass and organic dry-film thickness independently. Confirm substrate gauge before comparing nominal finished thickness between quotations.
Start with mechanical and forming requirements; then define the zinc coating and organic topcoat.
Often considered for common profiling and general fabrication where the application does not call for deep-drawing performance. Confirm the actual base grade and thickness.
A potential substrate choice when press or roll-forming requirements justify a defined forming grade; verify the mechanical properties after coating.
For specified structural profiles, select a grade with contractual yield, tensile and bending requirements rather than assuming commercial quality is adequate.
Share the finished part, minimum bend radius or forming drawing so the steel grade can be matched to the application.
Select the resin family by exposure, appearance, forming demand and the project’s stated performance criteria.
Common entry point for general roofing, wall panels and indoor fabrication. Specify the grade, film build and actual UV/corrosion performance required.
General applicationsA coating family used where gloss retention, surface durability or weathering characteristics are important; performance varies by formulation.
Modified polyesterA higher-durability polyester option for projects requiring defined weathering and color-retention targets. Request the supplier’s declared classification.
Enhanced weatherabilityA premium specification route for demanding exterior architectural finishes when the project calls for qualifying fluoropolymer chemistry.
Architectural coatingAvoid color mismatch by specifying the reference sample, finish and surface appearance alongside coil size.
Screen swatches are only visual cues—not measured RAL references. Final approval should use a physical color chip or agreed master sample. Confirm gloss, batch matching, color tolerance and orientation before order placement.
Color and gloss should be checked using the agreed sample, light conditions and measurement method. A visible computer-screen match is not a contractual color specification.
The zinc layer and paint film are different measurement systems; include both in your RFQ.
| GI coating designation | Nominal coating mass | How to interpret |
|---|---|---|
| Z100 | 100 g/m² | Both sides combined |
| Z140 | 140 g/m² | Both sides combined |
| Z180 | 180 g/m² | Both sides combined |
| Z275 | 275 g/m² | Both sides combined |
For an EN-style Z designation, the number refers to the total nominal two-side metallic zinc coating mass, not the mass per side. Confirm permissible tolerance and applicable substrate specification.
For example, an inquiry might state a 25 μm top organic film and a 10 μm reverse organic film. Those values are example procurement targets, not universal ASTM, JIS or EN minima.
PPGI is purchased as a finished-color input for equipment that forms, cuts or slits the coil into its final shape.
Supply prepainted coil for corrugated and trapezoidal roofing profiles. Define the panel profile, bend radius and intended external exposure.
Select color, gloss and coating quality for external façades and interior architectural panels.
Specify cutting, roll forming and bending requirements along with finish protection during fabrication.
Pre-finished GI coil can be used for appliance housings, enclosures and general fabricated items after suitability checks.
Master coil, slit coil and sheet feedstock for onward fabrication; agree edge condition and protective packaging.
For barns and utility structures, match the paint system and substrate coating to humidity, chemicals and service demands.
A project quotation can match PPGI coil dimensions with downstream roofing profile requirements.
Choose the color, gloss and project-specified exposure class before ordering the coil.
Send your profile drawing, BMT, coating system and planned coil inside diameter for a practical quotation.
Estimate theoretical coil length from base metal, metallic zinc and organic film masses for planning and quotation screening.
Enter base metal thickness, coil width, total zinc coating mass and total organic dry-film thickness. The tool estimates additional metal and paint mass before calculating length.
Approximate mass per meter = [BMT(mm) × Width(mm) × 0.00785] + [(Zinc(g/m²) + (Top μm + Back μm) × 1.3) × Width(mm) / 1,000,000]. Organic film assumed density: 1.30 g/cm³.
Illustrative calculation only. The paint-density assumption varies by formulation; actual mass also depends on tolerance and production. Packing, core and transport tare are excluded.
A controlled sequence of surface treatment, coating, curing and inspection provides repeatable prepainted strip for further fabrication.
Galvanized coil grade, zinc coating mass and incoming surface condition are selected for the target paint system.
Cleaning and pretreatment support coating adhesion before primer application.
The line applies the specified coating layers and cures them using controlled oven conditions.
Coated strip is cooled, inspected, tension-controlled and recoiled for storage or further processing.
The coil-coating route applies paint to flat strip before cutting or roll forming. Formability depends on the steel grade, paint flexibility, cure and final tooling geometry. Request actual test data when your product requires tight bends or visible architectural surfaces.
One coordinated specification across steel substrate, paint system and packaging can reduce purchasing ambiguity for steel-coil distributors and fabricators.
BAOSTEEL METAL reports 8 million MT annual production across its overall steel operations, enabling support for bulk steel purchasing.
Our team can quote against your base grade, zinc coating, paint chemistry, RAL reference and coil dimensions.
Order-specific MTC, zinc coating checks, film thickness testing and third-party inspection requirements can be included in the RFQ.
Discuss protected coil packing, net mass, handling limitations, shipping term and destination together with your procurement schedule.
The production and inventory figures describe the total steel business. PPGI availability, mill source, lead time and coating specification are confirmed per inquiry.
Coordinate coil processing with the actual topcoat and the receiving line to protect the visible coated surface.
Define your preferred finished slit widths, length tolerances, coil weight limits and protective requirements when requesting additional processing. The supplier will confirm which operations are available for the selected coating and thickness.
| Item | What to specify |
|---|---|
| Slit width | Finished width, tolerance and quantity per size |
| Edge requirement | Slit or mill edge; acceptable burr condition |
| Winding | Coated side out / in; winding direction if needed |
| Packaging | Protective film, moisture protection, pallet or coil-eye orientation |
| Handling | Maximum coil weight and suitable unloading equipment |
PPGI is a combination product. The galvanized substrate and organic coating must be specified using the correct technical framework.
| Standard | What it covers |
|---|---|
| EN 10169:2022 | Continuously organic-coated steel flat products: coating designation, appearance, testing and declared performance classes. |
| EN 10346:2026 | Continuously hot-dip coated substrate, including galvanized zinc-coated grades; confirm edition and material designation. |
| ASTM A755/A755M-18(2024) | Hot-dip metallic coated and prepainted steel for exterior-exposed building products. |
| ASTM A653/A653M-25a | Zinc-coated hot-dip galvanized steel substrate when the ASTM route is specified. |
| JIS G 3312:2024 | Prepainted hot-dip zinc-coated steel sheet and strip to a Japanese standard. |
Color consistency and paint integrity matter for architectural appearance; galvanized base quality matters for subsequent forming.
A complete RFQ avoids price comparisons between coils that differ in zinc mass, paint quality or delivered thickness.
| Ordering field | Information to provide |
|---|---|
| 1. Product and application | PPGI coil for roofing, cladding, forming or another specified application |
| 2. Steel substrate | Steel grade, relevant standard and BMT |
| 3. Zinc coating | Galvanized coating designation and both-side mass |
| 4. Paint system | PE / SMP / HDP / PVDF; primer and topcoat, top/back dry-film thickness |
| 5. Color and finish | RAL code, physical master sample, gloss, texture and color tolerance |
| 6. Coil dimensions | Width, ID, net mass per coil, edges, allowable OD and tolerances |
| 7. Test and paperwork | MTC, color check, film test, flexibility and any third-party requirements |
| 8. Logistics | Total MT, destination, delivery term, packing and loading limitations |
Plan color-coated steel procurement around the exact approved shade, coating build and batch quantity.
For ongoing distribution and roofing-panel production, share forecast tonnage by color, thickness and coating grade. The team can review options for matched lots, project schedules, processing availability and delivery documentation.
Different color families and organic paint systems may require different sourcing or production arrangements. Company-wide inventory figures are not a statement that every PPGI color and gauge is in stock.
Provide a rolling demand plan if you order multiple colors or repeated coil sizes for downstream manufacturing.
Coordinate packing details with the color-coated finish and the receiving yard’s handling equipment.
Prepainted coil needs packaging that preserves the visible color coating and manages moisture and edge damage during loading, transit and unloading. Packing configuration is confirmed by coil dimensions, destination and handling method.
Compare painted galvanized coil with painted Galvalume and unpainted metallic-coated products before specifying your purchase.
Internal product pages may be in draft status. Publish and confirm each destination before enabling public navigation.
Answers to the details that affect coated-coil specification, surface quality and shipment.
PPGI means prepainted galvanized iron/steel. The usual product is hot-dip galvanized steel strip with an organic paint system applied in a continuous coil-coating process.
PPGI uses a galvanized zinc-coated steel substrate; PPGL uses an aluminum-zinc alloy-coated substrate. Both can have color-coated top surfaces, but the underlying metallic coatings differ.
Provide the RAL reference and preferably an approved physical sample. Final shade, gloss and tolerance should be agreed against the production coating system.
PE, SMP, HDP and PVDF are coating families. Select by environment, intended service, forming conditions, available technical declarations and your project specification.
Under an EN-style galvanized Z designation, the number identifies the total nominal zinc coating mass in g/m² for both sides combined. It is separate from organic paint-film thickness.
Thickness descriptions vary between offers. State explicitly whether you need BMT or total coated thickness (TCT), and reference the correct standard and tolerances.
Top and reverse dry-film thickness should be defined in micrometers and by layer/system. Example values such as 25 μm top and 10 μm reverse are not universal standard requirements.
PPGI is widely used as roll-forming feedstock. Forming suitability depends on base steel properties, paint flexibility, bend geometry and line conditions; request specific evidence for demanding profiles.
Discuss MTC scope, substrate grade, zinc coating mass, paint film, color/gloss, adhesion/flexibility and additional inspection requirements with your RFQ.
Coating cost alone cannot establish service life. Compare the system’s declared resistance, its suitable environment, the substrate coating and any stated manufacturer warranty conditions.
Calculate mass per meter from steel base thickness and width plus zinc and paint masses, then divide net coil kilograms by the result. Use actual mill values for purchasing accuracy.
Share grade, standard, BMT, width, zinc mass, paint chemistry, top/back DFT, RAL shade, gloss, coil ID, net mass, order quantity, packing and destination.
Send your galvanized substrate grade, zinc coating mass, BMT, width, paint system, top and back film thickness, RAL color, gloss, coil dimensions, total tonnage and destination. Our team will verify the quotation basis, available source, processing and delivery terms.
Send your required grade, dimensions, quantity and destination. Our team will review the inquiry.
