Heavy-duty Ductile Iron Manhole Cover

Wet road conditions can increase driving risks. Our Dingjian Heavy-Duty Ductile Iron Manhole Cover features special anti-slip patterns on the surface. These raised patterns improve tire grip in rainy weather and help reduce the risk of vehicle slipping.

The product size is Φ700 with overall dimensions of 380 × 680 mm. It meets the D400 load rating and provides a 400 kN load capacity. This cover is suitable for city main roads, bus lanes, logistics parks, and other areas with heavy traffic requirements.

High-speed vehicles can generate impact forces and pressure changes when passing over road covers, which may create safety risks for traditional designs. Our Heavy-Duty Ductile Iron Manhole Cover uses an anti-lifting structure to secure the cover firmly in place.

This design helps prevent the cover from lifting, shifting, or creating noise during vehicle operation. The cover also uses sealing strips between the cover and frame to reduce metal-to-metal impact sounds.

Ductile iron provides excellent impact resistance and maintains stable performance in both hot summers and cold winters. It resists cracking and deformation under changing weather conditions.

We control every production step of this product. Our factory operates a complete casting line covering melting, molding, machining, and coating processes.

We do not outsource key production processes. This allows us to maintain consistent quality control throughout manufacturing.

Our coating workshop uses a hot asphalt spraying line to apply a durable protective layer to the cover surface. This coating improves resistance against road salt and salt corrosion from coastal environments. It is especially suitable for coastal cities, snowy regions, and other demanding outdoor applications.