Advantages and development trend of hot rolled pipe

With the development of society and the continuous advancement of the industrialization process, the diversification of pipes has become more and more important. Among many pipes, hot-rolled pipes have been widely used in many fields, such as fluid transportation, mechanical structure, automobile manufacturing, petrochemical industry, etc. by virtue of their low cost advantages and excellent comprehensive properties. This paper will discuss the advantages and development trend of hot-rolled pipe from the aspects of manufacturing process, characteristics and practical application.

Manufacturing process

Hot-rolled pipe is a kind of pipe that is very important in the field of steel pipe manufacturing, which usually refers to the steel billet rolled and processed above the recrystallization temperature. It is usually heated to high temperature by the billet, and then processed into seamless pipe or welded pipe through a series of process steps such as perforation, rolling, sizing, straightening, etc. This process can effectively eliminate the defects in the casting process, but also make the steel grain fine, so as to improve the toughness and impact resistance of the pipe.

peculiarity

Low cost: The hot rolling process is simple, high production efficiency, and suitable for mass production, which can effectively reduce costs.
Excellent mechanical properties: hot rolling process can destroy the casting structure of the ingot, refine the grain of the steel, eliminate the defects of the microstructure, make the steel structure dense, improve its mechanical properties.
Can produce larger caliber steel pipe: hot rolled pipe is different from cold rolled pipe, cold rolled pipe can only produce small caliber steel pipe, and hot rolled pipe can produce larger caliber steel pipe. However, because hot-rolled tubes are carried out at high temperatures, the final product is usually inferior to cold-drawn tubes in dimensional accuracy and surface finish.

Practical application

1. Building and Bridge engineering
In the field of building and bridge engineering structures, hot-rolled pipes are often used as structural support and protection measures. Because of its good plasticity and impact resistance, hot rolled pipes can show higher reliability when subjected to external loads, vibrations and shocks.

2. Mechanical manufacturing
Hot-rolled tubes are also widely used in mechanical and engineering manufacturing, and are often used to make stressed parts such as frames, drive shafts, and support structures. After hot rolling treatment, the internal structure of these parts is more uniform, which can effectively disperse the load and extend the service life of the product.

3. Fluid delivery system
Hot rolled pipes are widely used in urban water supply, heat supply, natural gas, oil and other fluid transportation systems. Because of its low production cost and good toughness, hot rolled pipes are often used in medium and low pressure conveying pipelines, especially in occasions where the size requirements are not particularly strict. For example, in the field of petrochemical industry, hot-rolled pipe as the main pipeline of transport media, can withstand high temperatures and a certain corrosive environment.

4. The energy sector
Hot-rolled pipes are also widely used in the energy industry, such as power transmission pipelines, boilers, pressure vessels and so on. These environments are usually accompanied by high temperature and pressure, which have high requirements for the toughness and temperature resistance of the pipe. Hot rolled pipe can still maintain good tensile strength and ductility under high temperature environment, which is an important part of ensuring long-term safe operation of industrial equipment.

With the upgrading of technology and the improvement of materials, the hot rolling process is gradually developing to the direction of high precision and green environmental protection. By optimizing the production process and improving the equipment, the precision and surface quality of the products are improved. At the same time, the production of hot-rolled pipes should also pay more attention to energy utilization efficiency and environmental protection to achieve green development.

In summary, hot-rolled pipe with its unique production process and good toughness, plays an important role in the fields of fluid transportation, mechanical structure, construction engineering and new energy equipment. With its cost advantage and good working performance, it has become the first choice for many engineering projects. And with the continuous progress of technology, hot rolled tubes can also have higher accuracy and performance, providing more cost-effective solutions for all walks of life.