D400 Anodic Oxidation Ductile Iron Manhole Cover with Lock - 600mm Opening, 70kg Weight for Urban Roads
This BS EN 124 D400 certified ductile iron manhole cover features anodic oxidation spray paint finish, integrated locking mechanism, hinges, and gasket for superior security and sealing performance. Designed specifically for heavy-duty urban roads, highways, and industrial applications.
| Loading Class | Clear Opening (mm) | Over Base (mm) | Height (mm) | Unit Weight (kg) |
|---|---|---|---|---|
| F900 | Φ600 | Φ820 | 100 | 135 |
| E600 | Φ600 | Φ820 | 100 | 85 |
| D400 | Φ600 | Φ820 | 100 | 70 |
| C250 | Φ600 | Φ820 | 100 | 60 |
| B125 | Φ600 | Φ820 | 100 | 55 |
- Material Preparation: High-quality pig iron and scrap iron melted with magnesium to create superior ductile iron alloy
- Casting: Precision sand casting of molten iron into molds for optimal dimensional accuracy
- Heat Treatment: Thermal processing to enhance structural strength and flexibility
- Surface Coating: Application of anti-corrosive anodic oxidation spray paint for extended service life
- Quality Control: Rigorous testing for load capacity, tensile strength, and dimensional compliance
SND has specialized in metal manufacturing for over 20 years, utilizing advanced techniques including sand casting, lost wax casting, lost foam casting, and precision machining. Our ISO9001-certified facility produces components from cast iron, steel, stainless steel, aluminum, and other materials, serving automotive, rail transportation, agricultural machinery, chemical, energy, and construction industries.
Comprehensive inspection protocols include spectrometer analysis, ultrasonic testing, magnetic testing, permeability testing, and tensile/yield strength verification to ensure consistent product quality and performance.
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