Cast iron pipe, cast iron pipe. Cast iron pipes are used for water, drainage and gas pipelines, including cast iron straight pipes and fittings. Labor intensity is very low.  According to the different casting methods, it can be divided into continuous cast iron pipe and centrifugal cast iron pipe. Centrifugal cast iron pipes are divided into sand and metal. According to the material, it is divided into gray cast iron pipe and nodular cast iron pipe. According to the interface form, it can be divided into flexible interface, flange interface, self-anchored interface, rigid interface and so on. Among them, the flexible cast iron pipe is sealed by rubber ring; the flange joint is fixed by flange, and the inner gasket is sealed by rubber flange gasket; the rigid joint generally has a large cast iron pipe seat, and the straight pipe is inserted and sealed by cement. This process is now largely eliminated.


According to its manufacturing method, it can be divided into sand centrifugal sleeve straight pipe, cast iron straight pipe and sand mould iron pipe.


According to the materials used, it can be divided into gray iron pipe, ductile iron pipe and high silicon iron pipe.
1. Water supply cast iron pipe:
The cast iron pipe for water supply cast iron pipe is made by casting molten iron No. 18 or higher and adding spheroidizing agent into the pipe by high speed centrifugal casting of centrifugal nodular iron machine. Ductile iron pipe has the characteristics of iron precision, steel, good corrosion resistance, good ductility and good sealing. The utility model has the advantages of good effect and simple installation, and is mainly used for water supply, gas transmission and oil transportation of municipal, industrial and mining enterprises. It is the preferred water supply pipeline with high cost performance.


2. Sand Centrifugal Cast Iron Straight Pipe:
Sand centrifugal cast iron pipe is made of gray iron. It is suitable for conveying water, air and other pressure fluids.


3. Cast iron straight pipe:
Continuous cast iron straight pipe is continuous cast gray iron pipe. It is suitable for conveying water, gas and other pressure fluids.


4. Drainage cast iron pipe:
Ordinary drainage cast iron sockets and accessories. Flexible anti-vibration interface discharges cast iron straight pipe. Cast iron pipes are sealed with rubber rings, bolted, and have good flexibility and flexibility under internal water pressure. It is suitable for large axial displacement and lateral deflection, indoor drainage pipes of high-rise buildings, especially in seismic zones. From the interface form, it can be divided into W-type flexible cast iron drainage pipe, B-type flexible cast iron drainage pipe and A-type flexible cast iron drainage pipe.