news — from the mill.
Production notes, industry updates, and a little colour on what we’re making this month.
Importing PPGI Coils into the Philippines: Regulations and Buying Tips
To import prepainted galvanized iron (PPGI) coils into the Philippines, you must comply with the Bureau of Customs (BOC) import procedures, secure the required product-specific certifications from the Department of Trade and Industry (DTI) and the Bureau of Philippine Standards (BPS), and prepare a complete set of commercial and shipping documents. This article explains the […]
Read →How Galvanized Substrate Quality Affects PPGI Coating Adhesion
The quality of the galvanized substrate is the single most critical factor determining whether a PPGI (pre-painted galvanized iron) coating will adhere properly and perform over time. If the zinc layer is inconsistent, contaminated, or poorly treated, even the most advanced paint system will fail through peeling, blistering, or corrosion creep. For importers and roll […]
Read →GI Coil vs. PPGI Coil: Cost, Performance, and When to Use Each
For procurement managers and roll formers, the decision between Galvanized (GI) and Pre-Painted Galvanized (PPGI) steel coil is not simply a matter of aesthetics. The core cost and performance difference is that GI coil offers a bare zinc coating applied after steel production, while PPGI coil adds a factory-applied paint system on top of that […]
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PPGL vs PPGI: Which Prepainted Steel Coil Performs Better?
When sourcing prepainted steel coils, the core question is not which coating is “better” in absolute terms, but which metallic substrate—galvalume (PPGL) or hot-dip galvanized (PPGI)—matches your application’s mechanical, corrosion, and budgetary constraints. In short: PPGL offers superior corrosion resistance and heat reflectivity in most exterior environments, while PPGI provides better formability, edge protection, and […]
Read →PPGI Coil Price Drivers: Raw Materials, Coating, and Market Factors
PPGI coil prices fluctuate because the product sits at the intersection of three volatile markets: base steel, zinc, and petrochemicals. When you negotiate a prepainted steel order, you are not just buying a coated sheet; you are buying a composite of commodity inputs, conversion costs, and logistics. Understanding which cost driver moves the price—and by […]
Read →PPGI Coil Defects Explained: Color Difference, Chalking, and Peeling
If your PPGI coil shows color difference, chalking, or peeling, the root cause is usually a combination of substrate preparation, paint formulation, curing parameters, and post-forming conditions. No single factor is responsible. Understanding the distinction between a material defect, a processing issue, and a site-induced problem is the first step toward prevention. This guide explains […]
Read →PPGI Coil Edge Damage: Causes, Prevention, and Handling Best Practices
Yes, you can prevent PPGI coil edge damage during transport and storage by controlling three variables: contact pressure, moisture exposure, and mechanical impact. Edge damage is rarely a single event; it is usually a cumulative result of improper lifting, inadequate packaging, or poor stacking conditions. This article explains the physical causes of edge damage, outlines […]
Read →PPGI Coil Zinc Coating Weight: A Practical Selection Guide
Choosing the right zinc coating weight for your PPGI coil is a balancing act between upfront cost, forming requirements, and the corrosion protection your end product needs in its specific environment. This guide explains how to evaluate Z275, Z180, Z120, and other common designations so you can specify a coating that is neither underspecified nor […]
Read →PPGI Coil Color Fading: Causes, UV Resistance, and How to Prevent It
Your PPGI coil color fades quickly because of a combination of UV exposure, pigment quality, resin system, and—critically—the thickness and type of the paint film applied. UV radiation breaks down the chemical bonds in the paint resin, while certain pigments are simply more vulnerable to photochemical degradation. To choose a more UV-resistant product, you must […]
Read →PPGI Coil for Roll Forming: Key Material Parameters to Optimize Your Line
To avoid roll forming issues such as fluting, camber, peeling, or inconsistent hole alignment, you must specify PPGI coil properties that match your forming station geometry, tooling tolerances, and final profile requirements—not just a generic paint grade. The most critical parameters to define are yield strength, coating hardness, and metallic coating mass, followed by substrate […]
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