VIETNAM TINH TUYEN INDUSTRY COMPANY LIMITED
"Building Sustainability – Shaping the Future"
Hotline:
0981115844 0919160055
VIETNAM TINH TUYEN INDUSTRY COMPANY LIMITED
Hotline:
0981115844 0919160055
Product Features:
The double-leaf opening design makes routine maintenance more convenient, reduces the effort required for opening, and improves work efficiency, especially in areas with frequent access needs.
Weight: Customized upon request
Size: 300×300 mm to 1000×1000 mm
Application: Suitable for urban roads, roadside areas, residential roads, squares, parks, pedestrian streets, special public facilities, stations, exhibition centers, and more.
Views:
Water systems: supply water, drainage, stormwater, sewage
Infrastructure: electricity, street lights, telecom, internet
Media services: mobile, landline, cable TV
Traffic & defense: signal lines, military cables
Pipeline systems: heating, gas, natural gas, oil pipelines
Special zones: airports, ports, docks, landscaping, residential areas
| Usage Group | Minimum Load Class | Applicable Area |
|---|---|---|
| Group 1 | A15 | Green belts, sidewalks, pedestrian-only zones |
| Group 2 | B125 | Sidewalks, bike lanes, small car parks, underground lots |
| Group 3 | C250 | Residential roads, alleyways, areas with light vehicles, 0.5m from curb |
| Group 4 | D400 | Main city roads, highways, expressways |
| Group 5 | E600 | Freight yards, docks, airports |
| Group 6 | F900 | Airport runways and ultra-heavy load zones |
As per GB/T 19426-2018, Specifications for ductile iron manhole covers and trench grates used in urban roads, plazas, parks, etc.:
Standard Dimensions:
Inner diameter, thickness, and rim width must meet required load-bearing specifications.
Material Requirements:
Must be made of ductile cast iron conforming to national and industry standards.
Product Inspection:
All covers must pass inspection before leaving the factory, including visual check, dimensional accuracy, burst strength, bending resistance, and impact resistance.
Production Quality Control:
Manufacturers must enforce strict quality control on raw materials and casting processes, using advanced testing equipment to ensure stable, reliable product quality.
