Stainless Steel Square Manhole Covers  

Core Advantages of Stainless Steel Manhole Covers

1. Unrivaled Corrosion Resistance
   • All-Weather Durability: Made from 316-grade stainless steel, our manhole covers endure over 2000 hours of salt spray testing (ISO 9227), ensuring a lifespan of 40+ years.
   • Chemical Inertness: Completely free from heavy metal leaching, our manhole covers meet GB 4806.9 food-contact safety standards, making them ideal for use in hospitals, food processing plants, and other hygiene-sensitive environments.
2. High Load-Bearing Capacity & Anti-Displacement Design
   • Torsional Stiffness: Featuring a square frame and anchored base, our manhole covers offer 35% more lateral shear resistance than traditional circular covers, making them perfect for dynamic environments like bridge expansion joints.
   • Load Distribution: Reinforced with strategically placed ribs, our covers ensure even pressure distribution, achieving a ≥300 kN static load (D400 grade) and withstanding 500,000 dynamic fatigue cycles.
3. Anti-Theft & Enhanced Safety Features
   • Non-Recyclable: The low scrap value of stainless steel deters theft, and optional fingerprint or RFID locks (IP67 rated) ensure superior security.
   • Emergency Pressure Relief: Hidden vents are incorporated to prevent dangerous methane buildup, meeting CJ/T 501 safety standards for additional protection.
4. Low Maintenance & Aesthetic Appeal
   • Zero Coating Required: Thanks to a self-healing passive film, our manhole covers require minimal maintenance—just occasional rinsing with water—resulting in 70% lower maintenance costs compared to cast iron alternatives.
   • Custom Design Options: Personalize covers with logo engraving, color coatings (fluorocarbon or PVD), and integration with smart streetlights or urban art to enhance the aesthetic of public spaces.
5. Eco-Efficiency & Cost Savings
   • 100% Recyclable: Our manhole covers are 100% recyclable, reducing the carbon footprint by 85% compared to new production, supporting a circular economy.
   • Rapid Installation: Pre-assembled modules allow for quick deployment in under 20 minutes, minimizing traffic disruption and saving time and labor costs.

Key Applications for Stainless Steel Manhole Covers

1. Municipal Roads: Ideal for use in square inspection pits and traffic signal pits on main roads and intersections.
2. Industrial Facilities: Perfect for petrochemical parks, coastal ports, and cable trenches, with 316-grade stainless steel used in environments requiring high salt resistance.
3. Smart Cities: Used in 5G micro-station pits and IoT-enabled smart parking sensor pits, driving innovation in urban infrastructure.
4. Landscape Projects: Custom-designed covers for commercial streets, theme parks, and public spaces that enhance urban branding and aesthetics.

Load-Bearing Grades for Manhole Covers

• A15–F900
  • Group 1 (A15): Green belts, sidewalks, and non-motorized zones.
  • Group 2 (B125): Sidewalks, bike lanes, car parks, and underground garages.
  • Group 3 (C250): Residential areas, alleys, and areas with light vehicles (within 0.5m of curbs).
  • Group 4 (D400): Urban main roads, highways, and expressways.
  • Group 5 (E600): Freight terminals, docks, and airports.
  • Group 6 (F900): Airport runways, requiring the highest strength.

Technical Specifications

• Dimensions: Available in sizes ranging from 500×500 mm to 1000×1000 mm for various installation needs.
• Load Capacity: Ranges from A15 to F900, providing solutions for all load-bearing requirements.

Choose our stainless steel manhole covers for superior performance, unmatched durability, and aesthetic appeal. Perfect for a wide range of applications, they meet the toughest safety, sustainability, and design standards.