Fireproof Glass Series
0102030405
Steel Fire Rated Door
The Steel Fire Rated Door is a high-performance door system constructed from premium galvanized steel sheets as its core material. It is precisely manufactured through specialized processes including cutting, stamping, and welding. The interior is filled with our proprietary high-density fire-resistant core material, while the joint between the door frame and door leaf is equipped with intumescent fire seals. This design ensures three essential protective functions — fire resistance, thermal insulation, and smoke containment — effectively slowing the spread of fire and providing critical time for evacuation and property protection. The Steel Fire Rated Door is widely applied in public areas of various building types, delivering reliable performance and enhanced safety in demanding architectural environments.
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.
Industrial Facilities
Public Institutions (Hospitals / Schools)
Commercial Buildings (Offices / Hotels / Residences)
Transportation Hubs (Airports / Rail Stations)
Military and Security Facilities
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.
| Door Frame | Material: 1.2mm~2.0mm galvanized steel sheet | |
| Structure | One-Piece Formed Structure | |
| Interlocking Formed Structure | ||
| Door Leaf | Material: 0.8mm~1.5mm galvanized steel sheet | |
| Door leaf thickness: 50mm | ||
| Reinforcement Structure | Thickness ≥ 3.0mm | |
| Product Size & Dimensions | Standard Size for Single Leaf Door: (Width ≤ 1200 mm) × (Height ≤ 2500 mm) Standard Size for Double Leaf Door: (Width ≤ 2200 mm) × (Height ≤ 2500 mm) Custom Door Maximum Size: (Width ≤ 4600 mm) × (Height ≤ 5000 mm) |
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| Observation Window | Grouted Fire-Resistant Glass: 25~32mm, composed of two glass layers with a high-transparency flame-retardant fire-resistant liquid poured and bonded between them | |
| Nano-silicon Fire-Resistant Glass: 25~35mm, composed of multiple original glass sheets combined with multiple layers of highly transparent and hard nano-silicon fire-resistant liquid interlayers | ||
| Door Leaf Core Material | Magnesium sulfate is used as the filling material for fire doors, and its core advantages are ingeniously embodied in its strong fire and flame-retardant protection, efficient heat insulation for temperature resistance, long-lasting and stable structural performance, as well as green and environmentally friendly safety characteristics | |
| Surface Treatment | Electrostatic Powder Coating: A surface finishing process that uses electrostatic attraction to apply powder coating onto the steel surface, followed by high-temperature curing to form a protective and decorative layer. This technique is widely used for steel fire-rated doors to enhance corrosion and rust resistance, extend service life, and improve aesthetic appearance. | |
Wood Grain Heat Transfer Printing: A surface treatment process that transfers pre-printed wood grain patterns from a transfer film onto the surface of the door frame or leaf through controlled heat and pressure. It creates a realistic wood texture while preserving the structural strength and fire resistance of the steel base material.
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| Hardware Components | Hinge : Exposed bearing-type hinge with a load capacity of ≥80 kg per piece. |  |
| Fire-Rated Lock: Lever-handle design with fire resistance ≥90 minutes. |  |
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| Riser Shaft Locks: Embedded anti-pry structure for secure installation. |  |
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| Panic Bar Lock : Horizontal push-bar mechanism enabling rapid egress in emergencies. |  |
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| Door Closer : Hydraulic type with adjustable closing time of 3–8 seconds, ensuring proper door closure. |  |
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| Handle: Ergonomic grip, 180–220 mm in length, suitable for various door types. |  |
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| Sequencer: Synchronizes double-leaf door operation, ensuring the inactive leaf closes before the active one; response time ≤0.3 s to prevent collision. |  |
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| Bolt: Locking force ≥300 N for enhanced door leaf stability. |  |
Standard Configuration
| Door Frame | 1.2mm galvanized steel sheet |
| Interlocking Formed Structure | |
| Door Leaf | 0.8mm galvanized steel sheet |
| Door Leaf Thickness: 50mm | |
| Colors | Electrostatic Powder Coating
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Wood Grain Heat Transfer Printing
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| Opening Method |  |
| Accessory Configuration | Hinge |
| Fire-Rated Lock | |
| Door Closer | |
| Bolt |