Manhole covers are a product used in many road facilities today, but in recent years, there have been numerous cases of theft and damage. These incidents have caused property losses to urban public facilities and, in severe cases, injuries to vehicles and pedestrians. The introduction of ductile iron manhole covers has alleviated this situation. Ductile iron manhole covers are a type of ductile iron product, where the iron is treated to produce spheroidal graphite, effectively enhancing the mechanical properties of cast iron, particularly increasing its plasticity and toughness, resulting in a higher strength than carbon steel.

Ductile iron manhole covers have excellent load-bearing capabilities, but the high load capacity varies with different specifications and models, and thus their application scenarios differ accordingly.

Load-bearing Grade Selection: Standard Reference: People's Republic of China National Standard GB/123858

A15: Off-limits areas for motor vehicles, including green belts and pedestrian walkways

E600 Freight Station, Dock, Airport Areas

D400 Urban Main Roads, Highways, Expressways, etc.

C250 Residential Area, Backs of Shu Xia Alley, only light motor vehicles or cars allowed, road curbs within 0.5 meters on both sides of the road.

B125 Pedestrian Walkway, Non-Motorized Vehicle, Small Car Parking, and Underground Parking

F900 Airport Runway and Equivalent Areas

Selecting the appropriate ductile iron manhole cover can effectively enhance its safety and stability. Long Kang Manhole Covers also offer customized services according to customer requirements, catering to the diverse needs of more clients.