As the forming process of stainless steel welded pipes becomes more and more mature, many places that need to use stainless steel pipes have begun to slowly change from the original stainless steel seamless pipes to stainless steel welded pipes. The benefits of doing so are to reduce manufacturing and reduce the cost of production enterprises, improve market competitiveness, and allow downstream end customers to buy the products they need at a lower price.

Although stainless steel welded pipes have many different advantages, some important fields still have to continue to use finished rolled pipes due to the need to optimize technical parameters or material requirements. For example, automobiles, motorcycles, electric vehicles, cylinders, petrochemicals, electricity, ships, aerospace, bearings, pneumatic components, low-pressure boilers and other fields.

What is a finished pipe?

Finished rolled pipe is one of the important processes in the production of seamless steel pipes. The production process does not heat the parent material, and the parent material is directly stretched and formed by cold processing of the rolling mill. Finally, a seamless steel pipe that meets the requirements is made. Therefore, we usually refer to finished rolled pipes or finished drawn pipes as cold rolled pipes and cold drawn pipes. The corresponding process is also called cold rolling (similar to cold rolling in steel processes).

What are the irreplaceable advantages of finished rolled pipes?

1. Based on the advantages of cold rolling process, the dimensional accuracy of the finished rolled tube is particularly high, the tolerance can be controlled within 0.05mm, and the inner and outer walls are smooth and there will be no oxide skin.

2. Excellent processing performance. Since there is no gap inside and outside the tube, the entire finished rolled tube can withstand high pressure, and will not crack or wrinkle even in the face of complex mechanical processing or deformation treatment. Such as cold bending, expansion, flattening, etc.

3. The promotion and application of precision seamless tubes can save steel, improve processing efficiency, reduce processing procedures and equipment investment, save costs and greatly save mechanical processing hours, increase output and material utilization, and at the same time help improve product quality and reduce costs.

What are the limitations of finished tubes?

1. The inevitable problem of cold rolling process is that internal stress will be generated during rolling, and the overall and local buckling strength of the finished rolled tube will be different.

2. The cross-sectional free torsional stiffness is low and the processing is difficult.

3. The forming wall thickness of the cold-rolled finished tube is small, and the ability to bear local concentrated loads is insufficient.

What is the production process of finished rolled tubes?

The production process of finished rolled tubes mainly includes:
Cold rolling or cold drawing: The parent material is stretched into shape by cold rolling or cold drawing process to ensure the dimensional accuracy and surface finish of the tube.
Control temperature and pressure: The temperature and pressure need to be strictly controlled during the production process of finished rolled tubes to ensure that the mechanical properties and physical properties of the tubes meet the standard requirements.
Removal of oxide scale: During the production process of finished rolled tubes, there is no oxide scale on the surface of the tube to ensure the corrosion resistance and appearance of the product.

What are the main limitations of finished rolled tubes?

Although finished rolled tubes have many advantages, there are also some limitations:
Internal stress problems: Internal stress will be generated during cold rolling, which may cause the overall and local buckling strength of finished rolled tubes to be different.
Low torsional stiffness: The cross-sectional free torsional stiffness of the finished rolled tube is low and the ability to withstand torque is limited.
Thin-walled structure: Due to the thin wall thickness of the finished rolled tube, it cannot withstand excessive local concentrated loads, so it needs to be carefully selected in applications with high load requirements.

What is the difference between finished rolled tubes and ordinary steel tubes?

Finished rolled tubes have higher precision and smoother surfaces than ordinary steel tubes. Its dimensional tolerance control is very strict, usually within 0.05mm, suitable for precision machining and high-end applications. The performance of precision rolled tubes in high pressure resistance and corrosion resistance is also better, especially for demanding mechanical and structural uses.

Why is the application of precision rolled tubes favored by the industry?

With its high precision, good surface quality and high pressure resistance, precision rolled tubes are widely used in many high-end industries such as automobiles, aerospace, petrochemicals, and machinery manufacturing. These industries have higher requirements for the strength, precision and durability of pipes, and precision rolled tubes just meet these special needs. In addition, the efficient production process of precision rolled tubes also provides manufacturing companies with better cost control and higher production efficiency.


Precision rolled tubes are widely used in many high-end industries with their high precision, smooth surface, strong pressure bearing, and corrosion resistance. Whether in automobiles, aerospace, petrochemicals, power, etc., precision rolled tubes play an indispensable role. The precision rolled tube products provided by BAOWI Steel not only guarantee high quality and high performance, but also help customers save costs, improve production efficiency, and meet your various needs for pipes.