Projects & Case Studies
Chongqing Rail Transit Line 10
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Project Case: Chongqing Rail Transit Line 10
High-Performance Steel Fire Doors & Transit Utility Door Systems for Mountainous Metro Networks
Our company engineered, manufactured, and supplied specialized fire-rated steel doors and heavy-duty subway utility doors for Chongqing Rail Transit Line 10, a vital backbone line in Chongqing's deep-underground and elevated mass transit network.
Engineered to endure severe air-pressure shocks, high humidity, and continuous public passenger traffic, our steel door systems deliver uncompromised fire compartmentation, structural stability, and long-term reliability for complex urban transit infrastructure.
Project Overview
Project Name: Chongqing Rail Transit Line 10
Location: Chongqing, China
Facility Type: Mass Transit Underground Railway & Transportation Hub
Product Scope: Custom Fire-Rated Steel Doors, Pressure-Resistant Service Doors, Emergency Escape Doors, and Stainless Steel Access Assemblies
Key Application Areas: Station Lobbies, Platform Tunnels, Traction Substation Rooms, Ventilation Shafts, and Emergency Passenger Escape Passages
Key Challenges & Engineered Solutions
1. High Piston Air Pressure & Deep-Underground Conditions
Challenge: High-speed trains navigating deep underground tunnels generate intense cyclic air-pressure shocks (piston effect) that strain door leaves and frame anchors.
Solution: We manufactured heavy-duty double-skin galvanized steel doors reinforced with internal steel channel stiffeners to resist recurring pressure fluctuations without structural fatigue or latches failing.
2. Certified Underground Fire Protection & Smoke Sealing
Challenge: Underground metro stations demand maximum fire containment and zero-smoke leakage to safeguard critical evacuation corridors during emergencies.
Solution: Supplied 60-minute to 120-minute fire-rated steel doors equipped with high-expansion intumescent smoke gaskets, heavy-duty panic push bars, and certified automatic door closers.
3. Humidity & Corrosion Endurance
Challenge: High ambient moisture in underground rail tunnels accelerates surface oxidation and structural rusting.
Solution: Applied specialized multi-layer anti-corrosion primers and heavy-duty electrostatic powder coatings, ensuring long service life with minimal maintenance demands.
Key Project Accomplishments
CNC Precision Manufacturing: Built with advanced CNC laser cutting and automated bending systems for exact dimensional alignment in complex underground civil structures.
Transit Safety Certification: All door assemblies successfully passed rigorous municipal transit authority testing for fire resistance, acoustic isolation, and pressure endurance.
Comprehensive OEM/ODM Service: Managed full-lifecycle support, from CAD drawing customization and hardware prep to batch delivery schedules matching site construction phases.
Partner with a Trusted Global Steel Door Manufacturer
From deep-level metro networks and airport hubs to heavy industrial plants and hospital infrastructure projects, we provide certified OEM/ODM steel door solutions engineered to global standards. Contact our technical team today for CAD drawings, product specifications, and factory-direct quotes.
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Technical Knowledge Base
Q
What is the main difference between UL 10C and EN 1634 steel fire door standards?
A
Testing Method: UL 10C requires mandatory hose stream impact testing; EN 1634 tests both fire integrity (E) and thermal insulation (EI) parameters.
Fire Ratings: UL ratings range from 20 to 180 minutes (3 hours); EN ratings are classified as 30, 60, 90, or 120 minutes.
Regional Usage: Choose UL 10C for Saudi/GCC projects following NFPA guidelines; select EN 1634 for European and British-standard-aligned project specifications.
Q
How long can commercial steel fire doors withstand direct high temperatures?
A
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