Projects & Case Studies
Shaoxing Rail Transit Line 1
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Project Case: Shaoxing Rail Transit Line 1
Heavy-Duty Steel Fire Doors & Utility Door Systems for Urban Metro Infrastructure
Our company engineered, manufactured, and supplied high-performance fire-rated steel doors and heavy-duty subway utility doors for Shaoxing Rail Transit Line 1, a major underground transit network connecting Shaoxing and Hangzhou.
Designed to satisfy strict railway safety standards and withstand high air-pressure fluctuations, continuous public traffic, and underground humidity, our door systems provide reliable fire compartmentation, structural rigidity, and long-term durability.
Project Overview
Project Name: Shaoxing Rail Transit Line 1
Location: Shaoxing – Hangzhou, Zhejiang Province, China
Facility Type: Underground Railway & Public Mass Transit System
Product Scope: Custom Fire-Rated Steel Doors, Pressure-Resistant Utility Doors, Emergency Escape Doors, and Stainless Steel Access Doors
Key Application Areas: Subway Station Lobbies, Platform Tunnel Exits, Equipment & Power Rooms, Maintenance Passages, and Underground Passenger Corridors
Key Challenges & Engineered Solutions
1. Underground Air Pressure & Structural Fatigue
Challenge: Piston air pressure generated by high-speed trains passing through tunnels places continuous cyclic stress on door leaves and frames.
Solution: We manufactured reinforced double-skin galvanized steel doors with internal stiffener ribs to withstand high pressure differentials without deformation or metal fatigue.
2. High-Standard Fire Safety & Smoke Barrier
Challenge: Underground subway stations require maximum fire resistance and smoke sealing to protect passenger evacuation routes during emergencies.
Solution: Supplied 60-minute to 120-minute fire-rated steel doors equipped with intumescent perimeter seals, heavy-duty panic exit hardware, and automatic door closers certified to strict fire codes.
3. Moisture & Corrosion Resistance in Underground Spaces
Challenge: High humidity levels in underground tunnel environments accelerate rust and metal corrosion.
Solution: Finished all steel door assemblies with specialized anti-corrosion primers and heavy-duty powder coating, ensuring long service life with minimal maintenance.
Key Project Accomplishments
CNC Precision Engineering: Utilized automated CNC laser cutting and precision bending machinery to meet exact underground structural engineering tolerances.
Rigorous Fire & Structural Testing: All supplied door units passed strict transit authority inspections for fire resistance, structural integrity, and hardware reliability.
Full OEM/ODM Project Delivery: Delivered complete end-to-end support, including CAD drawing coordination, custom hardware integration, and scheduled batch site deliveries.
Partner with a Leading Global Steel Door Manufacturer
From underground metro networks and major transportation hubs to industrial plants and hospital infrastructure projects, we deliver certified OEM/ODM steel door solutions built to global standards. Contact our technical engineering team today for CAD drawings, specification sheets, and factory-direct project 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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