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China Suppliers Factory for Premium Stainless Steel Fire-Rated Doors – Exceptional Durability & Design
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
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
What are the fire rating levels of your stainless steel fire doors?
Our stainless steel fire-rated doors are available in various grades: Grade C (≥ 30 minutes integrity/insulation), Grade B (≥ 60 minutes integrity/insulation), Grade A (≥ 90 minutes integrity/insulation), and ultra-Class A ratings (120-180 minutes) designed for heavy industrial or high-security facilities.
How does the smoke sealing system function during a fire?
The doors are engineered with a precise 1-3 mm gap between the door and the frame. Combined with high-performance fire-resistant intumescent seals, the strips expand rapidly under high temperatures to create an airtight seal, preventing toxic smoke and gases from passing through.
What grade of stainless steel is used for construction?
We use high-grade 304 stainless steel for both the frame and the door leaf. This material offers superior resistance to corrosion, wear, humidity, and impact, ensuring the doors maintain structural integrity and appearance in harsh environments.
Where should Grade A fire doors be installed?
Grade A stainless steel fire doors are ideal for critical protection zones, including fire control rooms, power distribution rooms, mechanical plant rooms, and high-value equipment storage areas where maximum fire insulation is required.
How do I maintain the finish of a stainless steel fire door?
To maintain the surface, clean regularly with a soft cloth and a neutral detergent. Avoid using steel wool, abrasive scrubbing pads, or highly acidic or alkaline chemicals, as these can scratch or damage the protective oxide layer of the stainless steel.