PPGI PPGL Prepainted Steel Coil
2 year ago
PPGI/PPGL(prepainted galvanized steel/prepainted galvalume steel ) is also known as pre-coated steel,color coated steel, coil coated steel, color coated steel, prepainted steel sheet. The PPGI steel coil/sheet made of cold-rolled steel sheet and galvanized steel sheet, subjected to surface pretreatment (degreasing, cleaning, chemical conversion treatment), coated in a continuous manner, and baked and cooled to form a product. Coated steel has light weight, beautiful appearance and good anti-corrosion performance, and can be directly processed.
Color coated steel coil is mainly divided into three parts: construction, household appliances and transportation. Building is generally used to build the roof, wall and door of industrial and commercial buildings such as steel structure workshop, airport,warehouse and freezer. Household appliances are used in the production of refrigerators and large air conditioning systems, freezers, toasters, furniture, etc. Transportation industry is mainly used for oil pan, automobile interior parts, etc.
PPGI is a product made of cold-rolled steel coil and (aluminum) galvanized steel coil after surface chemical treatment, coating (roll coating) or composite organic film (PVC film, etc.), and then baking and curing. This product is produced by the manufacturer in coils on the continuous production line, so it is also called prepainted steel coil. It not only has the properties of high mechanical strength and easy forming of steel materials, but also has good decoration and corrosion resistance of coating materials.
Zinc coated steel substrate for PPGI is typically produced on a continuous galvanizing line (CGL). The CGL may include a painting section after the hot dip galvanising section, or more commonly the metallic coated substrate in coil form is processed on a separate continuous paint line (CPL). Metallic coated steel is cleaned, pre-treated, applied with various layers of organic coatings which can be paints, vinyl dispersions, or laminates. The continuous process used to apply these coatings is often referred to as Coil Coating.The coil coating process may be used for other substrates such as aluminium, stainless steel or alloy coated steel other than "pure" zinc coated steel. However, only "pure" zinc coated steel is typically referred to as PPGI. For example, PPGL may be used for pre-painted 55%Al/Zn alloy-coated steel (pre-painted GALVALUME(r) Galvalume Steel Coil).
PPGI Steel Coil Specification
Standard
ASTM, BS, EN, DIN, GB, JIS, ASME, etc.
Grade
Dx51D, Dx52D, Dx53D, DX54D, S220GD, S250GD, S280GD, S350GD, S450GD, S550GD;
SGCC, SGHC, SGCH, SGH340, SGH400, SGH440, SGH490, SGH540, SGCD1, SGCD2, SGCD3, SGC340, SGC340, SGC490, SGC570;
SQ CR22 (230), SQ CR22 (255), SQ CR40 (275), SQ CR50 (340), SQ CR80(550), CQ, FS, DDS, EDDS, SQ CR33 (230), SQ CR37 (255), SQ CR40 (275), SQ CR50 (340), SQ CR80 (550); or Customer’s Requirement
Thickness
0.12~3.00 mm (cold rolled), 1.20~4.60 mm (hot-rolled)
Width
600mm-1500mm or 914mm/1000mm/1200mm/1219mm/1220mm
Tolerance
Thickness: ±0.01 mm
Width: ±2 mm
Coil ID
508 mm - 610 mm
Coil weight
3 Tons - 8 Tons or as client requirement
Zinc coating
30g/m² - 275g/m²
Spangle
Big spangle, Regular spangle, Mini spangle, Zero spangle
Surface treatment
Oil, Passivation, Chromated, Skin-passed, Anti-finger Print
HS code
72104900.00
Loading Port
Tianjin Port, Qingdao Port, Shanghai Port
Payment Term
L/C or T/T(30% deposit)
Delivery time
Within 15 workdays after deposit received
Package
plastic film + water proof paper + steel plate + packing steel strip
Application
Widely used in road, railway, civil construction, water conservancy construction; all kinds of machinery, electrical appliances, window protection and aquaculture, etc.
We can produce different sizes, thicknesses, widths and materials according to your requirements
Production Line
PPGI Production Process Flow Chart

PPGI paint coating
Coating primer |
Top paint coating |
Service life(years) |
1) Epoxy primer, good adhesion, water resistance, alkali resistance, chemical corrosion resistance, poor single toughness. |
1) Polyester resin, good adhesion, molding and outdoor durability. |
8-10 |
|
2) Silicon Modified Polyester (SMP) |
10-15 |
|
3) High weather resistant polyester (HDP) |
12-15 |
|
4) Polyvinyl fluoride (PVC) |
12-15 |
|
5) Polyvinylidene fluoride/fluorocarbon (PVDF) It has good formability and color retention, good outdoor durability and powder resistance, solvent resistance, limited color and high price. |
12-20 |
Quality Control
We have our own Physical & Chemical Testing Center Lab. to guarantee our product quality. Our test items & instrument fully meet international standards.

Packing Details
Standard Export Packing:
- 4 eye bands and 4 circumferential bands in steel
- Galvanized metal fluted rings on inner and outer edges
- Galvanized metal and waterproof paper wall protection disk
- Galvanized metal and waterproof paper around circumference and bore protection
- About the sea worthy packaging: extra reinforcement before shipment to ensure that the goods are safer and less damaged to customers.
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Main Product:
Carbon Steel Plate,
Pressure Vessel Steel Plate,
Alloy Steel Plate,
Wear Resistant Steel Plate ,
Galvanization Steel Coil,
Color Coated Steel Coil