China Suppliers of Stainless Steel Fire-Rated Doors - Durable & Aesthetic Factory Products
Product Features
Fire Resistance Performance
The fire-resistant material independently developed by our company filled inside the door leaf, combined with the fire-resistant intumescent sealing strip between the door frame and the door leaf, can prevent flame penetration within the specified fire resistance time, ensuring that the heat insulation performance of the stainless steel fire-resistant door meets the temperature requirements of all levels.
Smoke Sealing
The gap between the door and frame is precisely controlled within 1–3 mm, and combined with a door closer, ensures the door remains securely closed. The fire-resistant intumescent seals maintain elasticity under normal conditions and expand tightly at high temperatures, effectively preventing the spread of toxic smoke through stainless steel fire-rated doors.
Durability & Strength
Constructed from high-grade 304 stainless steel, both the frame and door leaf offer superior corrosion and wear resistance, standing up to humidity, heat, and harsh environments. The reinforced door structure provides excellent impact resistance and long-term stability — resisting deformation or cracking without frequent maintenance — ensuring durability and safety over years of use.
Aesthetic Appearance
Aesthetically, the surface retains the metal's natural texture while allowing for custom finishes such as antique bronze or black coating, breaking the monotony of traditional stainless steel tones and complementing or contrasting with the surrounding architectural palette.
Installation & Maintenance
During installation, the frame is assembled on-site and secured with expansion bolts, with the wall gaps filled using cement mortar for solid anchoring. Ensure a uniform clearance (approx. 3 mm) between the door and frame, and verify the door closer and fire-rated lock function properly after assembly. For routine maintenance, clean the surface using a soft cloth and neutral detergent; avoid steel wool or acidic/alkaline cleaners that might scratch or corrode the surface. Regularly inspect the hardware operation and sealing strips, and replace damaged components as needed to extend the service life of the stainless steel fire 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 fire rating grades available for stainless steel fire doors?
Stainless steel fire doors are classified into Grade A (90+ mins integrity/insulation), Grade B (60+ mins integrity/insulation), Grade C (30+ mins integrity/insulation), and specialty grades offering 120 to 180 minutes of fire protection for high-risk environments.
How do these doors prevent smoke transmission during a fire?
The door gaps are precisely engineered within 1–3 mm. Integrated fire-resistant intumescent seals remain elastic under normal conditions and expand rapidly at high temperatures to block smoke and toxic gases from passing through.
Where should Grade A fire-rated doors be installed?
Grade A fire doors are designed for critical infrastructure zones, including electrical power distribution rooms, fire control centers, generator rooms, and areas housing high-value equipment.
Can the visual appearance of stainless steel fire doors be customized?
Yes, while maintaining the natural metallic durability of 304 stainless steel, they can be customized with premium finishes like antique bronze or specialized black coatings to match modern architectural designs.
What is the recommended maintenance routine for these doors?
Clean surfaces regularly with a soft cloth and neutral detergent. Avoid using steel wool or acidic/alkaline cleaners. Regularly check hardware operation, door closers, and the condition of the intumescent sealing strips to ensure optimal performance.