Applications:

1. Petroleum and natural gas industry: used to transport oil and gas, build drilling platforms and pipeline facilities.

2. Chemical industry: used as pipeline and equipment components in chemical plants.

3. Construction engineering: used to build structural frames, scaffolds and plumbing pipes.

4. Machinery manufacturing: manufacturing all kinds of mechanical parts, such as transmission shafts, gear shafts, etc.

5. Electric power industry: used for steam pipes and thermal pipes in power stations.

6. Automobile manufacturing: such as exhaust pipes and other components.

7. Ship manufacturing: constructing the structure and piping system of ships.

Physical and chemical properties：

Physical properties:

1. The density is large, usually between 7.8 – 7.85 g/cm3. 2. Has a certain strength and hardness, can withstand large pressure and load. 3. Thermal and electrical conductivity is relatively poor. 4. Has good toughness and ductility, can be changed by processing shape.

Chemical properties of carbon steel pipes:

1. In the dry air at room temperature, the chemical properties are relatively stable. 2. In a humid environment, oxidation and rust are prone to occur. 3. Can chemically react with acids, but the reaction speed is relatively slow, unless it is a strong acid. 4. At high temperatures, it is easy to react with gases such as oxygen and hydrogen.