Ductile Cast Iron Double-Opening Square Manhole Covers

Core Advantages of Our Advanced Manhole Covers

Ultra-Fast Maintenance & Emergency Response
- Quick Access for Urgent Repairs: In just 30 seconds, one operator can open a single cover to address emergency situations like pipe bursts or cable failures.
- Efficient Dual-Side Opening: The design allows full access on both sides, enabling easy entry for forklifts, pumps, and other equipment, improving efficiency by 70% compared to traditional covers.
Dynamic Load Adaptability for Enhanced Durability
- Split Load Distribution: Our prestressed locking mechanisms provide a unified frame when closed, increasing torsional stiffness by 40%, making it capable of withstanding heavy vehicle impacts.
- Redundant Safety Features: In case of damage to one cover, the other will independently bear ≥50% of the rated load, ensuring no collapse occurs.
Top-Level Security & Smart Features
- Dual Locking Mechanism: Features independent mechanical and electronic locks, offering a CLASS IV anti-theft rating with remote authorization.
- Real-Time Monitoring: Built-in tilt sensors and load monitors provide status alerts (e.g., overloading, open/close state) sent directly to smart city platforms, ensuring proactive maintenance.
Cost-Effective Lifecycle Management
- Modular Design for Easy Replacement: Replace individual covers at 60% lower cost compared to full-unit replacements, enhancing cost efficiency.
- Maintenance-Free Design: Self-lubricating hinges and anti-corrosion coatings ensure that no servicing is required for over 10 years.

Key Applications of Our Manhole Covers

Utility Tunnel Mainlines: Ideal for managing power, telecom, and water supply/drainage pipelines with segregated maintenance.
Urban Flood Control: Provides quick and full-opening access for large pumps during storm conditions.
Rail Transit Nodes: Essential for metro tunnel access points and viaduct drainage wells, especially during nighttime maintenance windows.
Industrial Emergency Zones: Perfect for high-risk environments like chemical plants or oil/gas pipelines, ensuring quick and safe access during emergencies.

Minimum Load-Bearing Grades

Our manhole covers are available in various grades to suit different needs:

Load-Bearing Options
- Group 1 (Minimum: A15): Green belts, sidewalks, non-motorized zones.
- Group 2 (Minimum: B125): Sidewalks, bike lanes, car parks, underground garages.
- Group 3 (Minimum: C250): Residential areas, alleys, light vehicle zones.
- Group 4 (Minimum: D400): Urban roads, highways, expressways.
- Group 5 (Minimum: E600): Freight terminals, docks, airports.
- Group 6 (Minimum: F900): Airport runways.

Product Specifications & Compliance

Our manhole covers meet national and international standards to ensure optimal quality and performance:

Compliance Standards:
- EN124: European standard of manhole cover
- GB/T 19426-2018: Ductile Iron Manhole Covers for Roads and Bridges
- GB/T 23858-2009: Ductile Iron Castings
- CJ/T 3012-1993: Reinforced Concrete Drainage Covers
- CJJ/T 122-2016: Urban Road Drainage Design Code
Material: High-quality ductile iron, conforming to GB/T 23858-2009 and GB/T 19426-2018 standards.
Testing & Quality Control: Each cover undergoes rigorous inspections for appearance, dimensional accuracy, burst strength, bending force, and impact resistance.