Square Ductile Iron Manhole Cover

Ductile iron manhole covers have the following common classification methods according to different classification standards:

• 1.1

Municipal manhole covers: used for drainage, water supply, gas, electricity, communication and other pipeline manholes of municipal public facilities such as urban roads, squares, parks, etc. Municipal manhole covers usually need to meet higher bearing capacity and durability requirements to adapt to the complex conditions of urban traffic and environment.

• 1.2

Industrial manhole covers: used in industrial places such as factories, mines, docks, etc. Depending on the different industrial environments, there may be special requirements for the corrosion resistance, anti-slip properties, anti-static properties, etc. of the manhole covers.

• 1.3

Building manhole covers: mainly used for pipeline manholes inside or around buildings, such as basement drainage wells, rainwater wells around buildings, etc. The bearing capacity requirements of building manhole covers are determined according to the use function of the building and the surrounding traffic conditions. At the same time, there may be certain requirements for the aesthetics of the manhole covers and their coordination with the building environment.

• 2.1

Painted manhole covers: Paints of various colors are applied to the surface of ductile iron manhole covers to play a role in corrosion prevention and identification. Common colors include black, gray, yellow, etc. Different colors can be used to distinguish different pipe uses or areas.

• 2.2

Hot-dip galvanized manhole cover: A layer of zinc is formed on the surface of the manhole cover through the hot-dip galvanizing process, which has good anti-corrosion performance and can effectively extend the service life of the manhole cover. Hot-dip galvanized manhole covers are suitable for various harsh environments, such as humid underground environments, coastal areas, etc. The surface zinc layer is relatively strong and not easy to fall off.

• 2.3

Spraying plastic powder manhole cover: A layer of plastic powder coating is formed on the surface of the manhole cover by spraying plastic powder, which has good anti-corrosion, wear resistance and aesthetic performance. The plastic powder coating is rich in color and can be customized as needed to make the manhole cover more coordinated with the surrounding environment.

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