Square Ductile Iron Manhole Cover

The square nodular cast iron manhole cover is made of high-quality QT500-7 nodular cast iron, which is poured and formed in one go. It has high toughness, impact resistance, and is not easy to break, overcoming the fragile defects of ordinary gray cast iron. The product is strictly produced in accordance with GB/T23858 and EU EN124 standards, covering all levels of A15, B125, C250, D400, E600, F900, and meeting the needs of different working conditions such as sidewalks, vehicular roads, and heavy-duty plant areas.

The ordinary straight through square manhole cover and square cover box integrated structure has precise assembly clearance and outstanding cost-effectiveness. The back is reinforced with dense ribs to enhance load-bearing capacity, and the surface is treated with asphalt rust prevention, making installation simple. Suitable for green belts, sidewalks, non motorized roads in parks, and small maintenance wells.

The widened support wing of the anti settlement square manhole cover and seat is closely attached to the roadbed concrete, evenly dispersing vehicle loads and effectively solving problems such as road surface settlement, manhole cover height difference, and road surface damage. Paired with EPDM silent sealing strip, driving without bouncing or noise. Municipal road renovation, main roads, and preferred styles for parking lots.

The hinged square manhole cover plate is connected to the manhole seat with an integrated hinge, which will not be lost or stolen after opening, reducing maintenance costs in the later stage. Smooth opening and closing, convenient for regular pipeline maintenance, commonly used in commercial streets, scenic spots, and urban core sections.

The double-layer sealed square manhole cover has a double-layer structure inside and outside, with an outer load-bearing layer and an inner sealing layer, effectively isolating sewer odors, mosquitoes, and exhaust gases from flowing back. It has excellent waterproof and odor prevention performance and is commonly used in sewage pipelines, low-lying water accumulation areas, and high-end commercial and residential projects.

Core Advantages

Reliable material: QT500-7 ductile iron, resistant to rolling, impact, and long-term use without deformation

Safe and anti slip: The board surface is die cast with anti slip patterns, which can prevent slipping in rainy and snowy weather; Can cast rain, pollution, electricity, and communication labels

Silent shock absorption: optional EPDM rubber sealing strip to eliminate vehicle crushing noise

Corrosion resistant and durable: High temperature asphalt spraying for rust prevention, outdoor resistance to rainwater, acid and alkali corrosion

Complete specifications: 500 × 500, 600 × 600, 700 × 700, 800 × 800, 900 × 900 Regular in stock

Customization supported: Non standard sizes, logo reliefs, anti-theft locks, and special structures can all be customized

Application of Load Level

A15: Green belts, lawns, pedestrian only areas B

125: Pedestrians, pedestrian streets, non motorized vehicle lanes 

C250: Community lanes, small parking lots, roadside areas 

D400: Urban main roads, municipal highways, large parking lots (mainstream engineering) 

E600/F900: Heavy load sites such as ports, docks, logistics parks, airports, etc

Usage Scenarios

Power well, communication weak current well, rainwater well, sewage well, fire well, gas inspection well; Suitable for municipal engineering, residential communities, commercial squares, industrial parks, school and hospital infrastructure projects.