Zhengde Ductile iron pipe is a type of cast iron, an alloy of iron, carbon and silicon. Graphite in ductile iron exists in the form of spheroids. Generally, the size of graphite is grade 6-7. The quality requires that the spheroidization level of the cast pipe be controlled to grade 1-3 (spheroidization rate ≥80%). Therefore, the mechanical properties of the material itself The performance has been better improved, with the essence of iron and the performance of steel. The metallographic structure of the ductile iron pipe after annealing is ferrite plus a small amount of pearlite, and has good mechanical properties.
Ductile iron pipe is mainly called centrifugal ductile iron pipe. It has the essence of iron and the performance of steel. It has excellent anti-corrosion performance, good ductility, good sealing effect, and is easy to install. It is mainly used for water supply, gas transmission, and transportation in municipal, industrial and mining enterprises. Oil etc. It is the first choice for water supply pipes and has a high cost performance. Compared with PE pipes, ductile graphite pipes are simpler and faster to install than PE pipes in terms of installation time, and have better internal and external pressure resistance after installation; in terms of airtightness and anti-corrosion, ductile graphite pipes have better airtightness after installation, and are also The anti-corrosion performance can be improved through a variety of anti-corrosion methods; from the perspective of hydraulic performance, the specifications of ductile graphite pipes generally refer to the inner diameter, and the specifications of PE pipes generally refer to the outer diameter, because under the same specifications, ductile graphite pipes can achieve greater runoff; from In terms of comprehensive installation and maintenance costs, ductile graphite pipes have a more superior cost performance. The inner wall is sprayed with zinc, cement mortar anti-corrosion materials, etc.
 Selection suggestions
1. The selection of ductile iron pipes should be based on the specific conditions of the laying site and the interface form of straight pipes and accessories.
2. Rubber rings are usually made of NBR, SBR, EPDM and other materials.
3. Selection of coating: Choose an appropriate coating according to the internal and external conditions during use. The existing inner coatings are epoxy resin, polyurethane inner and outer coatings, PE film coatings and other new ductile iron pipe products. When selecting, you should understand their performance in detail.

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Shandong Zhengde Metal Manufacturing Co., Ltd. is a production and sales company integrating hot-rolled steel coils, cold-rolled steel coils, galvanized steel coils, color-coated steel coils, section steel, steel pipes, steel wires, metal mesh, stainless steel, aluminum, copper and other metal products integrated large enterprises. Five production and sales bases have been formed in Binzhou, Liaocheng, Wuxi, Tianjin, Jinan and Tai'an, with more than 100 production lines, 4 nationally recognized laboratories, 2 technical engineering centers, and 5 enterprise technology centers. Products are exported to more than 50 countries and regions such as North America, South America, Europe, Africa, Oceania, Middle East, and Southeast Asia.