Chengdu Xinfu Shengyuan Building Materials Co., Ltd.XINFU SHENGYUAN BUILDING MATERIALS

Chengdu ductile iron manhole covers are a type of ductile iron product. Through spheroidization and inoculation treatment, spherical graphite is obtained, effectively improving the mechanical properties of cast iron, especially its plasticity and toughness, resulting in higher strength than carbon steel.

Ductile iron is a high-strength cast iron material developed in the 1950s. Its overall performance is close to steel. Thanks to its excellent properties, it has been successfully used to cast parts that bear complex loads and require high strength, toughness and wear resistance. Ductile iron has rapidly developed into a widely used cast iron material second only to gray cast iron. The so-called "replacing steel with iron" mainly refers to ductile iron.

The main application fields of ductile iron manhole covers: municipal roads, highways, communications, electric power, water supply, residential communities, schools and various parks.

Ductile iron manhole covers are generally divided into round and square types. For municipal road use in urban areas, round covers are generally adopted because round covers are not easy to tilt and can better protect the safety of pedestrians and vehicles. The round shape is mainly used because every diameter of a round cover passing through its center has the same length, so if a cover is flipped up by a passing vehicle, its diameter will be slightly wider than the well opening below, so the cover will not fall into the opening.

For ductile iron manhole covers used in rural areas and cable wells, square covers are generally used, which better prevent the ingress of liquids such as rainwater.

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