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Painted Keel Product Introduction
Surface Treatment: Degreasing → Derusting → Phosphating → Electrostatic powder coating (painting), coating thickness ≥60μm
Coating Color: Standard white, black; customizable gray, silver and other colors
Product Type: U-shaped main keel, C-shaped cross keel, T-shaped keel, edge keel (trim keel)
- Overview
- Recommended Products
Product Overview
We launch high-quality painted keel series products, made from high-grade cold-rolled steel strips through precision rolling, degreasing and derusting, phosphating, and high-temperature electrostatic powder coating (painting) processes. Integrating excellent rust and corrosion resistance, flatness and aesthetics, load-bearing stability and easy installation, the products serve as the core load-bearing framework for ceiling and partition systems. Compatible with various boards (mineral wool boards, calcium silicate boards, gypsum boards, etc.), they provide stable support and a neat appearance for indoor architectural decoration. It is an ideal supporting material for architects, decoration companies, contractors and owners in ceiling and partition projects of commercial, public, residential and other buildings, widely applicable to various indoor decoration scenarios.
Specifications & Parameters
| Core Material | High-grade cold-rolled steel strip (Q235 grade), carbon content ≤0.12% |
| Surface Treatment | Degreasing → Derusting → Phosphating → Electrostatic powder coating (painting), coating thickness ≥60μm |
| Coating Color | Standard white, black; customizable gray, silver and other colors |
| Product Type | U-shaped main keel, C-shaped cross keel, T-shaped keel, edge keel (trim keel) |
| Cross-sectional Dimensions |
Main Keel: 50×15×1.2mm, 60×27×1.2mm, 75×27×1.2mm, 100×27×1.2mm (height × width × thickness) Cross Keel: 50×19×0.5mm, 60×24×0.6mm, 75×24×0.6mm, 100×24×0.6mm (height × width × thickness) Edge Keel: 50×30×0.5mm, 60×30×0.6mm, 75×30×0.6mm, 100×30×0.6mm (height × width × thickness) Custom cross-sectional dimensions available |
| Length Specification | 3000mm, 3600mm, 4000mm, 6000mm; customizable |
| Physical Performance |
Tensile strength ≥370 MPa Yield strength ≥235 MPa Flatness deviation ≤2mm/m Rust resistance grade: No rust after 48-hour neutral salt spray test in accordance with GB/T 10125 |
| Fire Rating | Class B1 flame-retardant (complies with GB 8624-2012 standard) |
| Environmental Standard | Paint coating is formaldehyde-free and heavy metal-free, meeting GB 18581 environmental standard |
| Installation Spacing | Main keel standard spacing 800–1200mm, cross keel standard spacing 400–600mm (adapting to different board load-bearing requirements) |
Product Features
Excellent Rust & Corrosion Resistance: Multiple surface treatment processes + high-temperature painted coating, isolating air and moisture, outstanding rust and corrosion resistance, long service life (15–20 years indoors).
Flat, Aesthetic & Easy to Clean: Uniform color and smooth surface of painted coating, no burrs or scratches, combining decorativeness and easy cleaning, can be used directly without additional encapsulation.
Stable & Reliable Load-bearing: High-grade cold-rolled steel strip substrate + precision rolling process, strong keel rigidity, not easy to deform, stable load-bearing performance, meeting the suspension needs of different thickness boards.
Easy & Efficient Installation: Standardized size design, complete accessories (hangers, connectors, fasteners), simple splicing and fixing, high construction efficiency and reduced labor costs.
Wide Compatibility: Compatible with mineral wool boards, calcium silicate boards, gypsum boards, aluminum ceiling panels and other ceiling/partition boards, adapting to exposed grid, concealed grid and other installation methods.
Environmental & Safe: Adopting environmental-friendly paint powder, formaldehyde-free, odorless, heavy metal-free, meeting green building indoor environmental requirements.
Good Weather Resistance: Suitable for conventional indoor environments (temperature -10℃–60℃, relative humidity ≤85%), not easy to fade or fall off, stable performance.
Application Scenarios
Commercial Buildings: Office building ceilings, shopping mall ceiling frameworks, hotel guest room/lobby ceilings, shop decoration keel systems, bank business hall ceilings, etc., balancing aesthetics and practicality.
Public Buildings: School classroom/library ceilings, hospital consulting room/ward ceilings (antibacterial paint optional), airport/railway station waiting hall ceilings, theater/exhibition center ceiling and partition frameworks, etc.
Residential Buildings: Apartment living room/bedroom ceilings, kitchen and bathroom ceilings (moisture-proof painted model), villa indoor decoration keels, basement ceiling support systems, etc.
Industrial Buildings: Factory workshop clean area ceilings, machine room ceilings (used with sound-absorbing boards), office building auxiliary room ceilings, etc., meeting functional requirements.
Other Scenarios: Old house renovation ceiling transformation, exhibition hall temporary ceiling frameworks, nursing home/nursery indoor ceilings and other spaces with requirements for environmental protection and safety.
Frequently Asked Questions (FAQ)
Q1: What is the core difference between painted keel and ordinary black iron keel?
A: The core difference lies in rust resistance and aesthetics: painted keel undergoes multiple surface treatments + high-temperature painting, with excellent rust and corrosion resistance, smooth and beautiful surface, and can be used directly; ordinary black iron keel has no rust-proof coating, is prone to rust, requires anti-rust paint + topcoat, and has a rough appearance with poor decorativeness.
Q2: What thickness of boards can the load-bearing capacity of the painted keel meet?
A: Regular specification keels can be adapted to various boards of 6–25mm thickness: 50-series keels for 6–12mm boards, 75-series for 12–18mm boards, 100-series for 18–25mm thick boards; if hanging heavier boards (such as 30mm thick calcium silicate boards), thickened keels (thickness ≥1.5mm) can be selected.
Q3: Is painted keel suitable for humid environments such as bathrooms and basements?
A: Yes. Special moisture-proof painted keels (with additional moisture-proof coating) can be selected, which have higher rust resistance (no rust after 72-hour neutral salt spray test) and can be used in humid environments for a long time to avoid rust and deformation.
Q4: Can the color of the painted keel be customized?
A: Yes. Standard white and black are available in stock, and various colors such as gray, silver and beige can be customized according to the project decoration style. The minimum customization batch can be communicated with the business team.
Q5: What precautions should be taken during installation?
A: ① Ensure the keel spacing meets the design requirements (main keel ≤1200mm, cross keel ≤600mm) to ensure uniform load-bearing; ② Use special hangers and expansion bolts for fixation, avoid using ordinary iron nails; ③ Check the keel flatness after installation, with deviation controlled within 2mm/m; ④ Ensure ventilation after installation in humid environments to avoid coating moisture.
Q6: Will the painted coating fall off or fade?
A: Under normal use, it will not fall off or fade significantly. The product adopts high-temperature curing painting process, with strong coating adhesion (meeting GB/T 9286 cross-cut test grade 1 standard) and good weather resistance, no obvious fading within 10 years of indoor use.
Q7: Are supporting installation accessories provided?
A: Yes. Special hangers, connectors, fasteners, expansion bolts and other complete installation accessories are supplied with the purchase of painted keels to ensure installation convenience and stability; at the same time, installation technical guidance manuals can be provided to assist the construction team in standardized operation.
