UL Fire Door Leaf: Engineered Protection from YK Fire Door Supplier
For over two decades, YK Door Industry Co., Ltd. has specialized in crafting UL-certified fire-rated doors trusted by architects and contractors globally. As a leader in fire door manufacturing, we design door leaves that combine rigorous engineering with real-world performance—here’s how our UL-certified cores set the industry standard.
1. Anatomy of a UL Fire Door Leaf
The door leaf—the active panel of a fire door—is more than a barrier. At YK, we engineer it as a multi-layered shield against flames, smoke, and radiant heat.
Core Components:
- Outer Skins: 1.2–1.6mm galvanized steel (G90 coating), precision-rolled for flatness (±0.3mm tolerance).
- Fire-Resistant Core: Mineral wool (density ≥110kg/m³) or ceramic boards (thermal conductivity ≤0.25 W/m·K).
- Edge Reinforcements: Cold-formed steel channels prevent warping under 1,000°C heat (UL 10C tested).
- Vision Panels: Optional UL-listed Keralite® FR glass (5mm thickness, 120-minute integrity).
2. UL Ratings Decoded: Matching Doors to Risks
YK’s UL fire door leaves are tested to withstand 20–120 minutes of direct flame exposure (ASTM E119 curve). Key applications include:
- 60-Minute Doors: Office partitions, hotel corridors.
- 90-Minute Doors: Hospital stairwells, school exits.
- 120-Minute Doors: Industrial boiler rooms, data center walls.
Compliance Essentials:
- Permanent UL label (listing number, rating duration).
- NFPA 80-compliant self-closing mechanisms.
- UL-approved hinges (4.8mm stainless steel pins).
3. Beyond UL: Dual Compliance for Global Projects
While UL standards (UL 10B/10C) govern North America, many clients require alignment with CE fire door ratings (EN 1634). YK’s hybrid solutions bridge both:
| Feature | UL Standard | CE Standard | YK Adaptation |
|---|---|---|---|
| Core Material | Mineral wool | Vermiculite composite | Dual-tested hybrid core |
| Temperature Curve | Rapid-rise ASTM E119 | Gradual EN 1363-1 | Cross-validated insulation |
| Smoke Seals | Intumescent strips | Cold smoke gaskets | Triple-layer graphite/silicone |
Case Study: A Toronto hospital required UL 90-minute doors with CE smoke leakage Class S200. We delivered doors featuring:
- UL-certified cores + EN 1634-3 cold smoke seals.
- Laser-etched dual UL/CE labels on the hinge edge.
4. Custom-Built for Your Facility
YK tailors UL fire door leaves to project specifics:
- Dimensions: Single leaf (up to 1300x2500mm), double leaf (2000x2400mm).
- Finishes: Electrostatic RAL powder coatings (200+ colors), anti-bacterial laminates for healthcare.
- Hardware Integration: Pre-drilled holes for UL-listed closers (LCN 4040XP) and panic bars.
5. Why YK Outperforms Generic Suppliers
Precision Manufacturing
- Robotic welding ensures ≤0.5mm panel gaps.
- 100% batch testing in our CNAS-accredited lab.
Transparent Certification
- QR codes linked to UL test videos and material certificates.
- Digital logbooks for maintenance tracking.
Global Support
- BIM files (Revit/Archicad) with UL/CE performance data.
- On-site installation training for contractors.
Choose YK for Fire Doors That Work When It Matters
In 2023 alone, our UL-certified door leaves protected 17 high-risk facilities—from Houston chemical plants to Dubai high-rises. With YK, you gain more than compliance; you secure engineered resilience.
Act Now
Contact our fire safety experts today for a free project audit. Let’s build a safer tomorrow—one UL-certified door at a time.
