Cast Iron Pipe

Cast iron pipe refers to a pipe cast by cast iron. Cast iron pipe is used for water supply, drainage and gas transmission pipelines, including cast iron straight pipes and pipe fittings. The labor intensity is low. According to different casting methods, it is divided into continuous cast iron pipe and centrifugal cast iron pipe, among which centrifugal cast iron pipe is divided into sand mold and metal mold. According to different materials, it is divided into gray cast iron pipe and ductile iron pipe. According to different interface forms, it is divided into flexible interface, flange interface, self-anchor interface, rigid interface, etc.

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