Introduction
PrePainted Galvanized Steel Coil (PPGI) and Pre-Painted Galvalume Steel Coil (PPGL) is a kind of building materials, with galvanized sheet and aluzinc sheet as the substrate, after pretreatment (degrease and chemical treatment) and liquid dope with several layers of color, then firing and cooling, finally the palte steel is called pre-painted galvanized steel coil (PPGI) or pre-painted galvalume steel coil(PPGL).
As the layer bears different colors, it is also known as color coated steel sheet. Through the combined use of diverse paints and base substrates, we select colors and material properties that meet the specific needs.
Painting information as following:
Top Paint: PVDF, HDP, SMP, PE(Polyester), PU.
Prepainted Galvanized Steel Coil has many functions like decorative (color ) machinability, weather resistance, scratch resistance, stain resistance, chemical resistance and adhesion resistance.
Primer Paint: Polyurethane, epoxy, PE.
The functions of this layer including machinability, corrosion resistance, adhesion and scratch resistance.
Back Paint: Epoxy, modified polyester.

Specification
Product Name | Prepainted Galvanized Steel Coils(PPGI) | Pre-Painted Aluzinc Steel Coils (PPGL) |
Thickness | 0.11-0.8mm | 0.11-0.8mm |
Width | 720mm-1250mm | 720-1250mm |
Coating mass | 30g/m2-275g/m2 (Zinc) | 30g/m2-185g/m2 (AZ) |
paint | Stand polyester(PE),Smp,HDP,PVDF | Polyester(PE),Smp,HDP,PVDF |
COLOR | RAL SCAL | RAL SCALE |
COIL INNER DIAMETER | 508mm or 610mm | 508mm or 610mm |
Coil weight | 3mt-5mt | 3mt-5mt |
Base meterial | Hot-dip galvanized steel cold rolled | Hot-dip Aluzinc steel cold rolled |
PRE-PAINTED GALVANIZED STEEL COIL | |||
ASTM A755M-03 | EN10169:2006 | JIS G3312:2012 | |
COMMERCIAL QUALITY | CS | DX51D+Z | CGCC |
STRUCTURE STEEL | SS GRADE 230 | S220GD+Z | CGC340 |
SS GRADE255 | S250GD+Z | CGC440 | |
SS GRADE275 | S280GD+Z | CGC490 | |
SS GRADE340 | S320GD+Z | CGC570 | |
SS GRADE550 | S350GD+Z | ||
S550GD+Z |
PRE PAINTED ALUZINC STEEL COIL | |||
ASTM A755M-03 | EN10169:2006 | JIS G3322:2012 | |
COMMERCIAL QUALITY | CS | DX51D+Z | CGLCC |
STRUCTURE STEEL | SS GRADE 230 | S220GD+Z | CGLC340 |
SS GRADE255 | S250GD+Z | CGLC440 | |
SS GRADE275 | S280GD+Z | CGLC490 | |
SS GRADE340 | S320GD+Z | CGLC570 | |
SS GRADE550 | S350GD+Z | ||
S550GD+Z |
Quality Control
1). Production scheduling:
All quality details required by customers, such as (RAL)color, glossiness, paint film thickness, weight per meter, width, roll length, roll weight, package as well as tolerance and delivery time, should be clearly recorded in the production sheet.
2). Following up manufacturing:
According to the requirements of the production schedule and the workshop operation standards, the production will be completed step by step to ensure that the quantity, quality, packing and delivery time are in conformity with the requirements of the buyers and relevant international standards.
3). Quality Inspection:
All goods will be inspected after finishing manufacture, a series of tests will be carried out, such as pencil hardness test, scribing hardness (also known as scratch hardness test), cut test, coating thickness measure, glossiness measure, impact test, moisture resistance test, MEK test, and visible spectrophotometer test. Survey report will be issued and presented to clients.
We ensure that all products conform to the requirements of the order and relevant international standards.
Applications
Our galvanized, galvalume and pre-painted steel products are widely used across various industries, including but not limited to:
📦 Packaging & Transportation
✅ Packaging Details
- Waterproof plastic film for moisture & rust protection
- Kraft paper or galvanized wrapping
- Edge protection with metal corners or rubber pads
- Secured with steel straps (inner & outer)
- Wooden or steel pallets available
🚚 Transportation Options
- Full container or bulk shipping (FOB / CIF / CFR)
- Truck transport to port or designated warehouse
- Palletized LCL shipping available for small orders
- Complete shipping documents provided (Packing List, Invoice, CO, etc.)