Pre Painted Steel Coil with 30–275g/m² Zinc Coating for Roofing Wall Cladding

Product Specification

Pre Painted Steel Coil with 30–275g/m² Zinc Coating for Roofing Wall Cladding and Appliance Panels

１．Product Overview

Pre Painted Steel Coil is widely used in roofing systems, wall cladding, appliance panels, HVAC duct fabrication, and industrial manufacturing applications requiring stable surface performance and corrosion resistance. The product combines galvanized steel substrate with organic paint coatings to improve weather resistance, color stability, and surface durability under indoor and outdoor service conditions.

The steel coil is available with PE, SMP, HDP, and PVDF coating systems, allowing different performance levels for humidity resistance, UV exposure, processing requirements, and long-term exterior applications. Zinc coating from 30–275g/m² provides additional corrosion protection for construction and manufacturing environments.

２．Technical Solution

The product uses a galvanized steel base combined with continuous coil coating processing. Surface pretreatment improves paint adhesion and coating consistency before primer and finish coatings are applied.

Top coating thickness of 10–25μm improves scratch resistance, color retention, and weather durability. Back coating thickness of 5–7μm provides additional rear-side protection during roll forming, transportation, and installation.

Different paint systems are suitable for different operating conditions:

• PE coating supports general indoor and commercial applications.
• SMP coating improves weather resistance and gloss durability.
• HDP coating provides enhanced outdoor durability and reduced chalking.
• PVDF coating offers stronger UV resistance and long-term exterior stability for architectural applications.

３．Specifications

４．Application

The product is commonly used in roofing sheets, wall cladding systems, ceiling panels, HVAC duct panels, appliance housings, storage equipment, furniture panels, and industrial fabrication components.

PVDF and HDP coated coils are suitable for outdoor architectural projects exposed to UV radiation and changing weather conditions. PE and SMP coated coils are widely used in interior panels, commercial equipment, and general manufacturing applications.

The product is also used for refrigerator panels, washing machine casings, air conditioner components, and electrical cabinet fabrication where appearance consistency and corrosion resistance are required.

５．Processing

The steel coil is suitable for roll forming, bending, stamping, profiling, and sheet fabrication processes. Standard 508mm and 610mm coil IDs support compatibility with common decoiling and processing equipment.

Proper storage in dry and ventilated environments is recommended to reduce moisture exposure before fabrication. Protective film and suitable packaging methods can help minimize surface scratches during transportation and handling.

６．Advantages

• Stable zinc coating improves corrosion resistance under industrial and construction environments.
• Multiple paint systems support different weather resistance and service-life requirements.
• RAL color system provides consistent appearance control for architectural and appliance production.
• 5–7μm back coating improves rear-side protection during fabrication and installation.
• 700–1250mm width range supports flexible manufacturing and sheet optimization.
• Pre-painted surface reduces secondary painting requirements and improves production efficiency.

７．How to Choose

• Select zinc coating level according to installation environment and corrosion exposure conditions.
• Choose PE or SMP coatings for general indoor and commercial applications.
• Choose HDP or PVDF coatings for long-term outdoor architectural projects with strong UV exposure.
• Confirm width and coil weight according to forming equipment and transportation requirements.
• Check coating thickness requirements for roofing, appliance, or decorative panel applications.

８．FAQ

Q1．What paint coatings are available for this product

PE, SMP, HDP, and PVDF coatings are available for different weather resistance and durability requirements.

Q2．What zinc coating range can be supplied

The zinc coating range is 30–275g/m².

Q3．What industries commonly use this steel coil

It is commonly used in roofing, wall cladding, HVAC systems, appliances, furniture, and industrial manufacturing.

Q4．What coil widths are available

Available coil widths range from 700mm to 1250mm.

Q5．What coil IDs are supported

Standard coil IDs are 508mm and 610mm.