English
Русский
Español
لالعربية
한국어
Français
Italiano
Projects & Case Studies
Nanjing Metro Line S7
- Product details
-
Project Case: Nanjing Metro Line S7
Heavy-Duty Steel Fire Doors & Transit Utility Door Systems for Regional Suburban Railways
Our company engineered, manufactured, and supplied specialized fire-rated steel doors and heavy-duty utility doors for Nanjing Metro Line S7 (Ningli Line), a vital regional rapid transit line connecting urban Nanjing with the southern Ninghang suburban district.
Engineered to endure severe piston air pressure shocks, high humidity, and continuous public passenger traffic across both elevated and underground segments, our steel door systems deliver uncompromised fire compartmentation, structural stability, and long-term operational reliability.
Project Overview
Project Name: Nanjing Metro Line S7 (Ningli Line)
Location: Nanjing, Jiangsu Province, China
Facility Type: Regional Rapid Transit & Suburban Metro Line
Product Scope: Custom Fire-Rated Steel Doors, Pressure-Resistant Service Doors, Emergency Escape Doors, and Stainless Steel Access Assemblies
Key Application Areas: Underground Station Lobbies, Elevated Platform Corridors, Traction Substation Rooms, Ventilation Shafts, and Passenger Evacuation Routes
Key Challenges & Engineered Solutions
1. Dynamic Piston Air Pressure & Cyclic Stress
Challenge: High-speed suburban trains entering and exiting underground tunnels generate intense cyclic air-pressure shocks that strain door frames and latching mechanisms.
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 frame warping.
2. Certified Fire Safety & Smoke Containment
Challenge: Transit stations require strict fire compartmentation and zero-smoke leakage to safeguard critical passenger 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. All-Weather Corrosion & Moisture Endurance
Challenge: Ambient moisture in underground tunnels combined with humidity exposure on elevated outdoor platforms accelerates metal oxidation.
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 transit 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 scheduled batch deliveries matching site construction phases.
Partner with a Trusted Global Steel Door Manufacturer
From regional rail transit 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.
related products
Single-Leaf Patient Room Doors
Durable single-leaf steel doors designed...
Unequal Double Patient Room Doors
Durable unequal double steel doors engin...
Hermetic Radiation-Shielded Doors
Certified hermetic radiation-shielded do...
Custom stainless steel and PE double-swi...
Product Inquiry
Please leave your message, we will contact you quickly after receiving it, thank you for your support!
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
Email us your request:
Hotline：
Email us your request：sales@tcrdoors.com
Hotline：+8618676989775
Whatsapp：https://wa.me/8618676989775
