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China Steel Fire Rated Door - High-Performance, Reliable Suppliers & Factory Solutions for Enhanced 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
Grade B
Grade A
Others
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
Q: What are the key fire rating grades for steel fire-rated doors?
Steel fire-rated doors are generally classified into Grade A (integrity & insulation ≥ 90 mins), Grade B (integrity & insulation ≥ 60 mins), and Grade C (integrity & insulation ≥ 30 mins). Other heavy-duty options provide 120 to 180 minutes of protection for high-risk areas.
Q: How does the smoke sealing system function during a fire?
The door features a controlled gap (1–3 mm) paired with an intumescent fire-sealing strip. Under normal temperatures, the strip remains flexible, but high heat causes it to expand rapidly, sealing the gaps to block toxic smoke and gases.
Q: Where should Grade A steel fire doors be installed?
Grade A doors are designed for critical fire protection zones. They are typically installed in fire control rooms, power distribution rooms, fan rooms, and spaces containing high-value equipment.
Q: What materials ensure the durability and strength of these doors?
The door frames and leaves are constructed using premium galvanized steel, which offers outstanding corrosion resistance. The structure is reinforced through welded or interlocking frames for high impact resistance.
Q: Are there customizable aesthetic options for steel fire doors?
Yes. The doors can be customized with electrostatic powder coatings in various colors from the RAL chart, or with wood grain transfer finishes (such as oak or walnut) to match different architectural designs.
Q: What maintenance is required for steel fire-rated doors?
Maintenance is straightforward: regularly inspect hardware flexibility (like hinges and door closers), clean the sealing strips, and replace any damaged components promptly to ensure long-term operational safety.