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Steel Coil Frequently Asked Questions
Quick answers to common questions about steel products.
PPGI normally uses a galvanized steel substrate, while PPGL normally uses a Galvalume substrate. Both have factory-applied paint systems, but their underlying metallic coatings differ.
Selection depends on structural requirements, forming processes, end-use applications, strength requirements and applicable product specifications.
Z275 generally indicates a total zinc coating mass of 275 g/m² across both sides, subject to the applicable standard and test method.
PE, SMP, HDP and PVDF systems have different durability and weathering characteristics. The correct choice depends on the environment, design life and maintenance requirements.
GI steel coil uses a zinc coating, while GL steel coil uses an aluminum-zinc alloy coating. Their corrosion protection mechanisms and performance vary according to coating weight, environment and application.
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