Product Description
Producing roofing sheets with Prepainted Galvanized Steel Coils (PPGI) can pose several challenges, both during the manufacturing process and in practical application. Below are the main problems:
1. Quality of Raw Materials
- Problem: Using low-quality galvanized steel or poor-grade coatings can result in substandard roofing sheets that corrode quickly or have poor adhesion of the paint layer.
- Solution: Ensure high-quality PPGI with proper zinc and coating thickness for durability and corrosion resistance.
2. Coating Adhesion Issues
- Problem: If the prepainted layer does not adhere properly to the galvanized substrate, it may peel or flake over time, especially in harsh weather conditions.
- Cause: Poor surface preparation, incorrect curing temperatures, or low-quality coatings.
- Solution: Use proper cleaning, priming, and curing techniques during the production process.
3. Thickness Consistency
- Problem: Inconsistent thickness of the steel substrate or paint coating can lead to weak spots, making the roofing sheets prone to damage or corrosion.
- Solution: Use advanced coating and thickness control technologies during production and ensure strict quality checks.
4. Edge Corrosion ("Edge Creep")
- Problem: Exposed edges of cut PPGI roofing sheets are prone to corrosion, as the zinc and paint layers may not fully cover the edges.
- Solution: Use proper edge protection techniques such as roll-forming with protective treatments or applying additional coatings to cut edges.
5. Bending and Cracking
- Problem: During roll-forming or bending, the prepainted surface may crack, exposing the steel to corrosion.
- Cause: Using steel with insufficient flexibility or coatings that are too brittle.
- Solution: Use high-quality, flexible PPGI with coatings designed for bending applications.
6. Color Fading and Uniformity
- Problem: Over time, the color of the roofing sheets may fade unevenly due to UV exposure, weather, or inconsistent paint application.
- Solution: Use UV-resistant paint and ensure uniform application of coatings during production.
7. Improper Profiling or Roll-Forming
- Problem: Incorrect profiling during the roll-forming process can cause roofing sheets to warp, buckle, or lose their structural integrity.
- Solution: Use high-precision roll-forming machines and ensure proper alignment during production.
8. Compatibility with Climate
- Problem: PPGI may not perform well in certain climates (e.g., coastal areas with high salt exposure) if the coating and substrate are not suitable.
- Solution: Use PPGI with additional corrosion-resistant coatings (e.g., zinc-aluminum alloy or specialized marine coatings) for such environments.
9. Cost Management
- Problem: Balancing production costs with product quality can be challenging, especially when competing in price-sensitive markets.
- Solution: Optimize raw material procurement, improve production efficiency, and focus on cost-effective yet durable coatings.
Product Parameters
Color steel coil is a composite material, which has both advantages of steel plate and organic material. It not only has the mechanical strength and easy forming properties of steel plate, but also has good decorative and corrosion resistance of organic material.
| CONTENTS |
COLOR COATED STEEL COIL |
| |
PREPAINTED GALVANIZED-PPGI |
PREPAINTED GALVANLUME-PPGL |
| BASE METAL |
JIS G 3312-CGCC, CGC340-570, (G550), |
JIS G 3312-CGLCC, CGLC340-570, (G550), |
| THICKNESS |
0.14-2.0MM |
0.14-2.0MM |
| WIDTH |
20-1500MM |
20-1500MM |
| COIL ID |
508/610MM |
508/610MM |
| COATING MASS |
Z30-275GSM |
AZ30-150GSM |
| PAING SYSTEMS |
PE/SMP/PVDF |
PE/SMP/PVDF |
| SURFACE FINISHING |
GLOSSY AND MATTE |
GLOSSY AND MATTE |
Packaging & Shipping
Company Profile
Promisteel, a subsidiary of Tianhe Group, was established in 2015 and is located in the Tianjin Airport Economic Zone. As an international steel trading company with rich export experience, We has a stable supply chain from domestic mainstream steel mills and a professional sales team, with customers in over 60 countries.
The company's vision is to "Respect the Nature Rules and be in Harmony with all associates." and its mission is to "Revive the brand value of Chinese steel Industry". Promisteel adheres to the values of Sincerity, Uprightness, Gratitude, Inclusiveness, Excellence, and Practicality, and implements these values in its business operations.
The company's services cover a wide range of industries, including steel structures, home appliance manufacturing, barrel manufacturing, shipbuilding, pipe manufacturing, gas tanks, transformer manufacturing, kitchenware manufacturing, food packaging, and more. The company is committed to providing customers with high-quality and cost-effective products and services, and providing solutions to customers' problems in the long process of international steel supply chains.
Promisteel is a promising and dynamic steel company that adheres to the concept of "Our Promise, Your Will" and continuously enhances its own strength and competitiveness, making positive contributions to achieving enterprise value and customer value.
FAQ
1. Where is your company located?
Our headquarters is located in Tianjin (China) where we also have one processing center and a warehouse, we have a GI factory in Shandong and an international branch in Singapore.
2. What types of steel products do you supply?
We supply various steel products, including coils, sheets, plates, and pipes, produced by us or sourced from renowned manufacturers.
3. What are your manufacturing facilities?
We have factories, processing centers, and warehouses for better quality control and efficient order fulfillment.
4. How do you ensure product quality?
We carefully select manufacturing partners and conduct thorough tests and pre-loading and pre-shipment inspections to ensure high-quality steel products
5. Do you offer certifications for your steel products?
Yes, our steel products comply with international standards and certifications upon request.
6. What payment terms do you offer?
We offer flexible payment terms to accommodate clients' needs.
7. What is your capacity for supplying steel products?
With our own facilities and inventory management, we can efficiently supply steel products of varying quantities.
8. Can you handle customized orders or specific requirements?
Certainly, we specialize in handling customized orders and meeting specific requirements.
9. What are your shipping and delivery capabilities?
We have a reliable logistics network for the global delivery of our steel products.
10. How can clients get in touch with your company?
For inquiries or orders, clients can contact us directly and our sales team is ready to assist promptly.
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