How is Ductile Iron Pipe Anti-Corrosion Treatment?

As a Ductile Pipe Manufacturers, I would like to share with you.

Ductile iron pipe is mainly called centrifugal ductile iron pipe. It has the essence of iron, the properties of steel, excellent anti-corrosion performance, good ductility, good sealing effect, easy installation, and is mainly used for water supply, gas transmission, and transportation of municipal, industrial and mining enterprises. Oil etc. It is the first choice for water supply pipes and has a high cost performance.

Ductile Iron Pipe

Ductile Iron Pipe is a type of cast iron pipe. In terms of quality, the spheroidization grade of cast iron pipes should be controlled to be 1-3 (spheroidization rate "80%), so the mechanical properties of the material itself.

It can be better improved, with the essence of iron and the performance of steel. The annealed ductile iron pipe has a metallographic structure of ferrite plus a small amount of pearlite, good mechanical properties, excellent anti-corrosion performance, good ductility, good sealing effect, easy installation, and mainly used for water supply and gas transmission in municipal, industrial and mining enterprises , Oil and so on.

A certain amount of spheroidal graphite is distributed on the ferrite and pearlite matrix. According to the nominal diameter and the requirements for elongation, the ratio of ferrite and pearlite in the matrix structure is different. The ratio of pearlite with small diameter Generally, it is not more than 20%, and the large-caliber is generally controlled at about 25%.

Anti-corrosion treatment

1. Asphalt paint coating

Asphalt paint coating is used to transport gas pipelines. Preheating the pipe before painting can improve the adhesion of asphalt paint and accelerate drying.

2. Cement mortar lining + special coating

This kind of internal anti-corrosion measures is suitable for pipelines that transport sewage, and can improve the corrosion resistance of the lining.

3. Epoxy coal pitch coating

The epoxy coal tar coating is suitable for both gas pipelines and sewage pipelines. It is a two-component coating that has high adhesion and a very smooth surface

4. Epoxy ceramic lining

Epoxy ceramic lining is suitable for sewage pipes and gas pipes, but due to the difficult manufacturing process and high cost, it has certain limitations in use. Epoxy ceramic lining has high adhesion and smoothness, and is a good anti-corrosion coating.

5. Aluminate cement coating or sulfate cement coating

Both of these special cement coatings are suitable for the internal anti-corrosion of ductile iron pipes for sewage pipelines, and improve the corrosion resistance of the acid and alkali components in the sewage.

6. Polyurethane coating

It is a new type of green special coating developed to meet the needs of environmental protection. It has good wear resistance and corrosion resistance.

Our company also has Seamless Steel Pipe on sale, welcome to contact us.