In municipal engineering and road construction, manhole cover selection impacts safety, durability, and cost. Hubei Road Middle Treasure’s 1200×740×60 ductile iron split-flap square cover is becoming the preferred choice for numerous projects due to its exceptional performance and reliable quality.
Unlike traditional circular covers or small square covers, the 1200×740×60 large split-flap design targets specialized applications requiring larger coverage area and higher load-bearing capacity. Hubei Road Middle Treasure Metal Products Co., Ltd. demonstrates significant advantages in this niche through technical expertise and production experience.
Corporate Strength and Professional Background
Established on July 19, 2017, with registered capital of 80 million RMB, Hubei Road Middle Treasure is located in the Honghu Xintan Economic Cooperation Zone, Wuhan Economic & Technological Development Zone.
Specializing in ductile iron products, the company occupies 120 acres and employs over 200 staff, including 30+ technical professionals.
Utilizing advanced intelligent production processes, the company operates fully automated horizontal static pressure molding lines, vertical parting flaskless shot squeeze molding lines, core-making equipment, and medium-frequency induction furnaces.
It also employs state-of-the-art testing equipment including front-end rapid analyzers, spectrometers, metallurgical microscopes, and universal testing machines to ensure stable and reliable product quality.
Practical Advantages of Split-Flap Design
The split-flap design offers significant benefits for large manhole applications:
- Enables easier installation and maintenance without full cover removal.
- Reduces individual cover weight for simpler transport, handling, and installation.
- Ideal for frequently accessed utility systems (e.g., power cables, fiber optics) allowing rapid access with minimal traffic disruption.
Exceptional Material Performance
Ductile iron’s spheroidal graphite structure (achieved via nodulizer additives) enhances toughness and tensile strength versus traditional gray iron:
- Tensile strength ≥420MPa, yield strength ≥300MPa (matching mild steel; 3× gray iron).
- Superior vibration damping compared to cast steel, reducing stress concentrations.
Large-Specification Application Advantages
The 1200×740×60 specification addresses unique large-opening needs:
- Expansive coverage protects underground equipment from external damage.
- 60mm thickness ensures structural integrity under heavy traffic flows.
- Precision material formulation reduces weight by ≈30% versus equivalent gray iron covers, easing installation.
Comprehensive Safety Features
Multi-layered safety considerations:
- Dedicated anti-theft mechanisms require specialized tools for opening.
- Diamond-pattern anti-slip surface enhances traction in rain/snow.
- Precision cover-frame fit eliminates bounce/noise during vehicle passage.
Weather Resistance and Service Life
- Excellent corrosion resistance against rainwater, de-icing agents, and chemicals.
- Special anti-corrosion treatments extend service life in harsh environments.
- Corrosion tests show 90-day corrosion mass is 1/40th of steel pipe and 1/10th of gray iron, with 2× gray iron and 5× steel pipe lifespan.
- Low maintenance costs deliver significant lifecycle economies.
Practical Applications and Market Recognition
Proven performance in major projects:
- June 2022: Selected as supplier for Yichang Municipal Public Facilities Management Office’s anti-settlement ductile iron cover procurement.
- Certifications include ISO 9001, ISO 14001, and ISO 45001, ensuring quality consistency and reliability.
Conclusion
The success of Hubei Road Middle Treasure’s 1200×740×60 ductile iron split-flap cover stems from the perfect integration of materials science, engineering technology, and practical application.
From material selection to structural design, production processes to quality control, every reflects deep understanding of performance requirements and user needs. When selecting large square covers, Road Middle Treasure’s solution offers the optimal balance of safety, durability, economy, and convenience.