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Zhengzhou City, Henan Province, China

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PPGI Sheet

PPGI sheet is an eye-catching and durable prepainted product. It is widely used in construction, home appliances, the furniture industry, the automobile industry, etc. At Wanzhi Steel, prepainted galvanized steel sheets are available in different colors, paints, finishes (Glossy, matte, textured, embossed, etc.), sizes, and profiles. Wanzhi Steel is a China PPGI steel manufacturer, with a Shandong Province factory. With a strict quality control system, we promise to offer our clients top-quality products at a factory sale price. Welcome to contact us for more details!

PPGI Profile Sheet

RAL9003 PPGI Profile Sheet

PPGI Plain Sheet

RAL5015 PPGI Plain Sheet

PPGI Sheet Specification

Item Prepainted Galvanized Steel Sheet
Substrate GI (galvanized iron sheet)
Thickness 0.13 mm-1.5 mm
Width 600 mm-1,250 mm
Length Upon your requirements
Paint Thickness 5-35 μm (back/top painting)
Colors As per RAL Color (custom patterns are available)
Annual Production 320,000 tons
Delivery Time Within 7-30 days after receiving the deposit (depending on the order quantity)
Package Standard export package or as per your requirements

What Is PPGI Sheet?

PPGI sheet is short for pre-painted galvanized steel sheet. It is a kind of pre-painted steel sheet, which uses galvanized steel sheet as the base metal. Then it is painted with one or several layers of organic coatings after surface pretreatment (degreasing and cleaning), and then baked and solidified continuously. Then the coils will be cut into sheets of the desired size. Through rolling equipment, the plain sheets can be profiled into corrugated PPGI sheets.

PPGI Sheet Manufacturing Process

At Wanzhi Steel, we commonly use the double-coating and twice-baking methods. If you have special requirements, please let us know. Let’s review the process step by step.

PPGI Manufacturing Process

PPGI Coil Manufacturing Process

1. Uncoil and weld the zinc-coated steel coils so that they can be processed continuously.

2. Then the coils will go through an inlet looper for pretreatment to remove the rust and impurities through degreasing, cleaning, and chemical conversion.

3. Primer coating process. Both sides will be coated and baked for the first time.

4. Finish the coating process. After cooling down, the coils will be painted and dried again.

5. Cool down the coils below 40 °C. After the quality control system, the coils will be rolled up through an outlet looper. Then you can shear or profile the coil into sheets according to your needs.

Here is a video showing how to cut PPGI coil into plain sheets.

PPGI Structure

As mentioned, pre-painted galvanized steel sheet uses zinc-coated steel as substrate. That is to say, it is made of base metal and zinc coatings. Before coating, it will be cleaned to remove the rust and impurities on the surface. Then it will be coated by a chemical conversion coating. Then several layers of organic coatings are painted. Taking double-sided and twice-baked pre-painted GI sheets for example, it contains base metal, zinc coating, pre-treatment (chemical conversion coating), primer coating, and top/back coating. Below is the structure diagram of the PPGI color coating sheet.

PPGI Color Coated Sheet

Pre-painted Galvanized Steel Sheet Structure

PPGI Sheet (Hot-dip galvanized)

The product uses a hot-dip galvanized steel sheet as the base metal. In addition to the protection of the zinc layer, the organic coating also protects the metal from rust. So its service life is longer than that of the hot-dip galvanized sheet. The zinc thickness of the hot-dip galvanized substrate for exterior uses can reach up to 275 g/m2. We offer custom solutions to meet special requirements.

PPGI Sheet (Electro-galvanized)

The electro-galvanized sheet is used as the substrate and then painted with organic coatings. Because the zinc layer of the electro-galvanized sheet is thin. So this product is not suitable for outdoor uses, such as walls, roofs, etc. But because of its beautiful appearance and excellent processing performance, it can be mainly used in home appliances, audio, steel furniture, interior decoration, etc. You can choose according to your use purpose and environment.

Hot-dip Galvanized Sheet

Hot-dip Galvanized Sheet

Electro-galvanized Sheet

Electro-galvanized Sheet

Wholesale PPGI Sheet Manufacturer – Wanzhi Steel

Professional Factory

Wanzhi Steel is a wholesale PPGI steel supplier in China, which has its factory. At our factory, we have 3 color coating lines, with an annual production capacity of 320,000 tons. There are also two galvanizing lines with an annual production capacity of 350,000 tons. Besides, there are sets of rolling equipment with different designs, shearing lines, etc. to meet different needs for plain or corrugated pre-painted galvanized steel sheets. Welcome to contact us to visit our factory online or on-site.

Rolling Equipment

Rolling Equipment

Profiling Machine

Profiling Machine

Global Exporter

Wanzhi Steel has years of experience in exporting. During these years, we have developed a multilingual sales team to serve clients all over the world. As a wholesale supplier, we will provide a competitive price for bulk orders. Also, free samples are available. Welcome to contact us for more details!

Wanzhi Color Coating Line

Wanzhi Color Coating Line

Color Coating Pool

Color Coating Pool

Good Customer Reviews

Wanzhi Steel promises to offer our clients quality products in accordance with the contract, including base metal, thickness, width, coatings, etc. We accept third-party quality inspection. Thanks to quality assurance, we have got many good reviews from our clients. Below is a review from our clients from Nepal.

Customer Reviews from Nepal

Customer Review on PPGI Sheet from Nepal

How to Calculate the Weight of the PPGI Sheet?

You can estimate the weight of your PPGI sheets with the following formula:

Thickness (mm) * Width (m) * Length (m) * 7.85 = (kg/pcs)

Note: 7.85 is the density of iron. It means per cubic meter of iron weighs 7.85 tons.

The weight per sqm mainly depends on the thickness. For example, if your GI color-coated sheets are gauge 28 (0.38 mm) in thickness, the PPGI sheet weight per sqm is about 2.98 kg. If the thickness is gauge 24 (about 0.61 mm), the weight per square meter is about 4.79 kg.


Weight of PPGI Profile Sheet

Weight of PPGI Profile Sheet

Below let’s calculate the weight of the 0.5 mm pre-painted galvanized profile sheet. If it is 1.15 m in overall width and 1.8 m in length, each piece weighs about 8.12 kg (0.5*1.15*1.8*7.85). So there are about 123 pieces per ton. If you order 5,000 pieces, the total weight is about 40 tons. Then it requires two 40GP containers for shipping. If you want more details, don’t hesitate to get in touch with us!

RAL3020 PPGI Corrugated Sheet

RAL3020 GI Colour Coated Sheet

PPGI Tile Sheet


PPGI Sheet Color

The colors are mainly divided into solid colors and printed patterns. And both are customizable.

1. Solid PPGI Color

The hot-selling pre-painted galvanized steel sheet color includes sky blue (RAL 5015), signal white (RAL 9003), moss green (RAL 6005), tomato red (RAL 3013), traffic black (RAL 9017), etc. We can send you sample products for your reference. If you have special requirements, you can choose according to the RAL color or send us a sample. Then we will mix colors and offer you a sample product. After your confirmation, we will mass-produce your order.

Popular Colors

Popular Colors

2. Printed Pattern

Our popular patterns include flower patterns, grass, brick, marble, wood grain, blue sky, etc.  Of course, we can also customize the pattern according to your needs.

PPGI Color Coated Corrugated Sheet

Grass Pattern

Traffic Sign

Traffic Sign

Pre-painted Galvanized Steel Sheet Price

The wholesale pre-painted galvanized sheet price is about 700 to 1,100 USD dollars per ton. It is different with many factors, such as the painting, paint thickness, etc. For example, a painted steel whiteboard (writing board) will be more expensive than the common white PPGI sheets because of the different paints. Also, some PPGI sheets use different paints for the top and back sides. Besides, the PPGI sheet price will change with the market. Moreover, the quantity will also largely affect the price. As a manufacturer of precoated galvanized iron profiles and plain sheets, we have a PPGI factory in Shandong Province. So we will offer a factory-direct sale price. Also, we will offer discounts for bulk orders. Welcome to contact us for more details!

Plain Pre-painted GI Sheet

Plain Pre-painted GI Sheet

Wavy PPGI Sheet

Color Corrugated Sheet

PPGI Sheet Uses

There are different designs of pre-painted GI sheets, including profile sheets and plain sheets. They are widely used in construction, household appliances, transportation, furniture, etc. The data shows that 31% is used in home appliances and 63% in construction. Below are some of the main industries where PPGI is used.

1. Construction

Precoated galvanized iron profile sheets are applied to factories, warehouses, roofing and walls, coiling doors, etc. While plain PPGI panels are widely used as window frames, doors, ceilings, elevators, stairs, ventilation ducts, etc.

PPGI Sheet in Construction

Construction Use

PPGI Fence Panel

Fence Panel

2. Furniture & Office Equipment

Pre-painted GI sheet is used to make radiators, lampshades, wardrobes, tables, beds, bookshelves, lockers, etc.

3. Electrical Equipment

Prepainted galvanized steel sheet is also used to make shells of refrigerators, washing machines, air conditioners, microwave ovens, etc. It is more sophisticated than the PPGI sheet for construction works. We have a 20-ton order of color-coated steel sheets for home appliances to Iran.

Steel Office Furniture

Steel Office Furniture

PPGI for Home Appliance Uses

Home Appliance Uses

4. Transportation

Precoated galvanized iron profile sheets are also found in the interior decoration of cars and trains, containers, various panels for ships, oil purifiers, etc.

5. Others

Pre-painted galvanized iron sheets are also materials for writing whiteboards, billboards, traffic signboards, etc.



Wood Grain Steel Door

Wood Grain Steel Door

Advantages of PPGI Color Coated Sheet

The GI color coated sheet we produce has characteristics of long service life, easy installation, high strength, and beautiful appearance. That’s why it is getting popular among investors.

1. Light Weight

The weight of colored GI sheets ranges from 1 to 10 kg/m2, which is about 1/30 of a brick wall. According to the weight calculation formula: Thickness (mm) * 1 m * 1 m* 7.85 = (kg/m2), the PPGI sheet weight per sqm mainly depends on the thickness. Therefore, the weight of our GI color coated sheet is available from 1.099 kg/m2 (0.14*1*1*7.85) to 9.42 kg /m2 (0.14*1*1*7.85). So its shockproof performance is better, which makes the building safer. Besides, it is easy to transport to save your cost.

2. High Strength

Colour coated GI sheet keeps the mechanical properties of steel, including bending strength, elongation, tensile strength, etc. It is still tough and durable to use. The application of the coating is to protect its surface from rusting and make it good-looking.

PPGI Color Coated Sheet

Architectural Uses

3. Beautiful Appearance

The colour coated steel sheet is pretty, which means there is no need for extra decoration. Moreover, the color can keep for many years.

4. Flexible and Quick Installation

It is fast and easy to install if using colored galvanized sheets as building materials. On the one hand, it can shorten the construction period by more than 40%. On the other hand, there is no need for a deep foundation, which is good for the environment.

Easy to Install

Easy to Install

PPGI Sheet Package

Firstly, PPGI panels are strapped together with at least two steel belts in both transverse and longitudinal directions. Then wrap the package with waterproof kraft paper and plastic film to protect it from moisture. According to your request, it will be fixed with wood or galvanized pallets. Below are some pictures for your reference.

PPGI Steel Sheet Packaging

Outer Packaging

Packaging of PPGI Sheets

Inner Packaging

Tips for Buying PPGI Color Coated Sheet

PPGI sheet is a kind of finished product. There are a variety of specifications, colors, and designs to choose from. And the color coated steel sheet price is affordable. This makes it a great investment project. Before purchasing, you can ask yourself the questions below to help you choose a suitable pre-painted galvanized steel sheet.

1. What will you use the pre-painted galvanized steel sheet for? It will determine the design, thickness, width, coatings method, etc. For example, if you use the PPGI sheet as the base metal of the sandwich panel, a one-layer back painting sheet will be better because it has better adhesion.

2. Where will the pre-painted GI sheet be used? The use environment will influence the color, coating thickness, zinc layer thickness, etc.

3. Do you have specific sizes, including the thickness, width, and length?

4. How many colored GI sheets do you need? The quantity will directly influence the price. Wanzhi Steel is a wholesale supplier of prepainted galvanized steel coils and sheets. So we will offer you a very competitive price. If you have any questions, please contact us for professional tips.

Blue Pre-painted Steel Sheet

Signal Blue Pre-painted Steel Sheet

RAL9017 PPGI Sheet

RAL9017 Colour Coated Sheet

Wanzhi Words

As a GI colour-coated sheet manufacturer, Wanzhi Steel always offers our clients quality products at a fair price, as well as full service. We always believe we are more than a company, but also a partner and consultant for our clients to supply custom solutions. Although we are not famous enough now, we focus on our brand value. In the past 12 years of exporting, we won many regular customers around the world. Choose us, and you will enjoy cooperating with us. Just talk with us for a factory tour or a free sample here!

Color Coated Steel Sheets to Iran

Color Coated Steel Sheets to Iran

Prepainted Galvanized Steel Sheet

Prepainted Galvanized Steel Sheet

Read Before Filling Contact Form

1. Please inform us of the specifications (including the thickness, width, length, etc.), colors (as per RAL color) or patterns, and profile designs. You can also send us pictures.

2. Painting and painting thickness are also important. The max top paint thickness is 35 μm. The common thickness is 5+10 μm (back+top). If you have special requirements, please let us know.

3. If you have special requirements for the base metal, such as the zinc layer thickness of the galvanized sheets, let us know, please. Another base metal, such as PPGL, cold rolled sheet, is also available. Moreover, if you want special surface treatment, for example, plastic film covering, please let us know.

4. How many pieces or tons do you need? Order quantity will directly influence the price. As a wholesale supplier, the MOQ is 25 tons.

5. Also, tell us your packaging requirements, port, shipping, and other requirements.

6. If you are not sure, please tell us what you will use the PPGI panels for. We will offer you a custom solution.

7. Your special requirements, for example, certificates required (SGS, CNAS, etc.).  Third-party quality inspection is acceptable.

8. We will offer an A4-size sample for free. Welcome to contact us if you need it. We will be 24*7 here for you.

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