What Is Carbon Steel Seamless Steel Pipe?

Carbon steel seamless steel pipe is a commonly used metal pipe composed of carbon and iron, with a long strip shape and a hollow cross-section. It is widely used as a pipeline for conveying fluids (such as oil, natural gas, coal gas, water, etc.), and is also used to manufacture structural parts and mechanical parts, such as oil drill pipe, automobile transmission shafts, bicycle racks, and steel scaffolding in construction.

Material characteristics

1. Chemical composition

The main chemical component of carbon steel seamless steel pipe is carbon (C), which usually contains a content between 0.0218% - 2.11%. In addition, it also contains a small amount of silicon (Si), manganese (Mn), sulfur (S), phosphorus (P) and other elements. The content and proportion of these elements determine the mechanical properties and processing properties of the steel pipe.

2. Mechanical properties

It has high strength and hardness and can withstand greater pressure and tension. At the same time, it also has certain toughness and plasticity, and can withstand impact and deformation to a certain extent. Its tensile strength, yield strength, elongation and other mechanical properties vary according to different grades and specifications.

3. Processing performance

Good processability, can be processed into steel pipes of various shapes and sizes through hot rolling, cold rolling, cold drawing and other processes. At the same time, welding, cutting, bending and other processing operations can also be carried out to meet different engineering needs.

Production process

1. Hot rolling process

The steel billet is heated to a high temperature and then rolled by a rolling mill to form a seamless steel pipe. The hot rolling process can produce steel pipes with larger diameters and thicker walls, which are suitable for some large-scale engineering and heavy machinery fields.

2. Cold drawing process

On the basis of hot-rolled steel pipes, the diameter and wall thickness of the steel pipe are further reduced by the drawing action of the cold drawing machine, thereby improving the dimensional accuracy and surface quality of the steel pipe. The cold drawing process is suitable for some fields with high requirements for dimensional accuracy and surface quality, such as precision machinery, automobile manufacturing, etc.

Application fields

1. Petrochemicals

Used for transporting various petrochemical products such as crude oil, natural gas, and refined oil. Its corrosion resistance and sealing properties can ensure the safety and stability of fluid transportation and reduce the risk of leakage. At the same time, it can also be used as a process pipeline for various chemical reactions and separation operations in the petrochemical production process.

2. Mechanical manufacturing

It can be used to manufacture various mechanical structural parts, such as drive shafts, piston rods, hydraulic cylinders, etc. Its high strength and good toughness can meet the requirements of materials in the field of mechanical manufacturing. At the same time, it can also be used as a fluid delivery pipeline for the delivery of coolants, lubricating oils, etc. in the process of mechanical manufacturing.

3. Construction engineering

In building structures, it can be used as support columns, beams and other components to provide stable structural support for buildings. Its high strength and good stability can withstand the weight and external forces of the building to ensure the safety of the building. At the same time, it can also be used as a plumbing pipe for the delivery of hot and cold water inside the building.

4. Automobile manufacturing

It is used to manufacture automobile exhaust pipes, fuel pipes, brake pipes and other components. Its good corrosion resistance and processing performance can meet the requirements of automobile manufacturing. At the same time, it can also be used as a material for automobile chassis and body structural parts to improve the strength and safety of the car.

Summary

In general, carbon steel seamless pipes play an important role in the petroleum, chemical, electric power, aviation, metallurgy and other industries due to their excellent performance and wide application fields.

Read more: Difference between seamless pipe and seam pipe