A ductile iron surface box refers to a box made of ductile iron, which is widely used in infrastructure, utilities, and construction. It is designed to protect and provide easy access to underground utilities, including water, gas, and electric lines.

Characteristics

High Strength and Durability: Ductile iron has high strength and impact resistance, enabling the surface box to withstand heavy loads and harsh environmental conditions. It is resistant to corrosion, rust, and other forms of degradation, with a long service life.

Good Sealing Performance: Usually, a sealing device is pre-installed between the box body and the lid, such as an NBR rubber seal, to ensure excellent tightness and prevent the entry of sand, dirt, and water.

Easy to Use: The surface box's design is convenient for installation, maintenance, and operation. It has a spacious chamber, which makes it easier to install and remove extension spindles. Some models also feature capabilities like deflection and internal fixation for extension spindles.

Surface Treatment

Epoxy Coating: Such as fusion-bonded epoxy coating, which has good corrosion resistance and wear resistance, and can protect the ductile iron surface box from chemical corrosion and mechanical damage.

Bitumen Coating: Cold-applied black bitumen coating can also provide a certain degree of corrosion protection and is suitable for some environments with relatively harsh soil conditions.

Applications

Water Distribution: Used to protect water valves, water meters, and other water supply facilities to ensure the normal operation of the water supply system.

House Wiring: Can be used to protect electrical cables and wiring in buildings to prevent damage to the cables and ensure electrical safety.

Fire Protection: Applied to fire hydrants and other fire-fighting facilities to ensure that fire-fighting equipment can be quickly accessed in case of a fire.

Accessory Protection: Used to protect various accessories， such as gas valves, drainage pipes, etc.

Common Standards

Ductile iron surface boxs often need to meet relevant international or national standards. For example, EN124 is a commonly used European standard, which specifies the requirements for load-bearing capacity, size, and other aspects of cast iron manhole covers and surface boxes.

Product Examples

The black ductile cast iron surface box from Anjoy Global is model AJCI-BOX-04. It has a round dimension of 13 cm × 18 cm × 19 cm and weighs 5.2 kg. Made from ductile cast iron, the surface can be treated in various ways, including without any coating, with an epoxy primer, black bitumen, or powder coating.