The essence of cast iron steel pipe is ductile iron pipe. Because ductile iron pipe has the essence of iron and the performance of steel, it is called this. The graphite in ductile iron pipes exists in spherical form, and the size of graphite is generally grade 6-7. The quality requires that the spheroidization level of cast iron pipes be controlled to level 1-3, with a spheroidization rate of ≥80%. Therefore, the mechanical properties of the material itself have been better improved, and it has the essence of iron and the properties of steel. After annealing, the metallographic structure of ductile iron pipe is ferrite plus a small amount of pearlite, and has good mechanical properties, so it is also called cast iron steel pipe.

Features: It has the nature of iron, the performance of steel, excellent anti-corrosion properties, good ductility, and easy installation. It is mainly used for water supply and gas transmission in municipal, industrial and mining enterprises.

Ductile iron pipe is a type of cast iron pipe. Quality requires that the spheroidization level of cast iron pipes be controlled to be 1-3 with a spheroidization rate greater than 80%. Therefore, the mechanical properties of the material itself have been better improved, and it has the essence of iron and the properties of steel. The annealed ductile iron pipe has a metallographic structure of ferrite plus a small amount of pearlite. It has good mechanical properties, excellent anti-corrosion properties, good ductility, good sealing effect, and is easy to install. It is mainly used for water supply and gas transmission in municipal, industrial and mining enterprises. , oil transportation, etc.