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China Steel Fire Rated Door Suppliers | High-Performance Factory-Made Solution for Fire Safety
Product Features
Fire Resistance Performance
The door leaf is filled with our self-developed fire-resistant core material, while an intumescent fire-sealing strip between the door frame and the leaf expands under high temperatures to block flame penetration. This structure ensures the steel fire-rated door maintains its thermal insulation performance and meets fire resistance requirements across all rating levels.
Smoke Sealing
The door gap is precisely controlled within 1–3 mm and paired with a door closer to ensure the door remains closed. The fire-sealing strip stays flexible at normal temperatures and expands under heat to tightly seal gaps, effectively preventing the spread of toxic smoke.
Durability & Strength
The door frame and leaf are made of premium galvanized steel with excellent corrosion resistance. The welded or interlocking frame structure provides high impact resistance, ensuring long-term durability in daily use.
Aesthetic Appearance
Available in electrostatic powder coating (colors selectable from the RAL chart) and wood grain transfer finishes (simulating oak, walnut, etc.), the surface coating is smooth and free from pinholes or bubbles, allowing the steel fire-rated doors to complement various architectural styles.
Installation & Maintenance
The frame is fixed with expansion bolts, and the gap between the frame and wall is filled with cement mortar for stability. Routine maintenance is simple—regularly check the hardware for flexibility, clean the sealing strips, and replace any damaged components individually—ensuring a longer service life for the steel fire-rated door.
Fire Rating
Grade C
Fire integrity ≥ 30 minutes, fire insulation ≥ 30 minutes; Suitable for secondary fire protection areas such as pipe shafts and cable shafts, mainly used to block the spread of small fires.
Grade B
Fire integrity ≥ 60 minutes, fire insulation ≥ 60 minutes; Suitable for areas with moderate fire protection requirements such as stairwells, antechambers, and evacuation routes.
Grade A
Fire integrity ≥ 90 minutes, fire insulation ≥ 90 minutes; Suitable for important areas such as fire control rooms, power distribution rooms, rooms with valuable equipment, and fan rooms.
Others
Fire integrity ≥ 120-180 minutes, fire insulation ≥ 120-180 minutes; Suitable for areas with ultra-Class A fire protection requirements such as chemical workshops, tunnel escape exits, and arms and ammunition depots.
Application Areas
Industrial Facilities
Public Institutions (Hospitals / Schools)
Commercial Buildings (Offices / Hotels / Residences)
Transportation Hubs (Airports / Rail Stations)
Military and Security Facilities
Frequently Asked Questions
What materials make these steel fire-rated doors fire-resistant?
The door leaf is filled with a self-developed fire-resistant core material, and an intumescent fire-sealing strip is applied between the frame and leaf. This strip expands under high temperatures to seal gaps and block flames.
How do the doors prevent toxic smoke from spreading?
The gap between the door frame and leaf is tightly controlled between 1–3 mm. Paired with a reliable door closer, the system ensures the door remains firmly closed, while the sealing strip expands under heat to block smoke.
What fire rating grades are available and where should they be used?
We offer Grade C (30 mins) for pipe/cable shafts; Grade B (60 mins) for stairwells and evacuation routes; Grade A (90 mins) for control/distribution rooms; and custom ratings (120-180 mins) for ultra-high-risk areas like chemical workshops.
Can the appearance of the steel fire-rated doors be customized?
Yes. The doors are available in electrostatic powder coating with colors selected from the RAL chart, as well as wood grain transfer finishes (simulating oak, walnut, etc.) to match various architectural designs.
What are the key maintenance requirements for these doors?
Maintenance is simple: regularly inspect hardware flexibility, clean the fire-sealing strips to ensure responsiveness, and replace any damaged components individually to extend the door's service life.