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China Steel Fire Rated Door Suppliers - High-Quality Factory-Produced Fire-Resistant Door Systems
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 are the primary functions of a steel fire-rated door?
Steel fire-rated doors are designed to provide fire resistance, block the spread of toxic smoke, and offer high durability. They feature a specialized fire-resistant core and heat-expanding intumescent seals that seal gaps under high temperatures to ensure safety during emergencies.
How do Grade A, Grade B, and Grade C fire doors differ?
The main difference lies in their fire integrity and insulation ratings. Grade A provides at least 90 minutes of protection, suitable for high-risk areas like power rooms. Grade B offers at least 60 minutes, ideal for stairwells and evacuation routes. Grade C offers at least 30 minutes, commonly used for pipe and cable shafts.
What type of finishes and styles are available?
We offer electrostatic powder coatings in a wide range of RAL colors, as well as high-quality wood grain transfer finishes (simulating oak, walnut, etc.). The finishes are smooth and bubble-free, allowing the doors to integrate seamlessly into diverse architectural designs.
Where should these fire doors be installed?
They are highly recommended for industrial facilities, public institutions (like hospitals and schools), commercial buildings (offices and hotels), transportation hubs (airports and rail stations), and military or security complexes where fire containment is critical.
What routine maintenance do steel fire-rated doors require?
Maintenance is straightforward: regularly check the hardware for smooth operation, inspect and clean the fire-sealing strips to ensure they remain intact, and verify that the door closer fully shuts the door to maintain proper containment capability.