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The Features and Applications of Seamless Steel Pipe

The time of issue:2013-12-3 8:31:03       Author:

Seamless steel pipes have incomparable features and a large range of applications which make them account for high market demand rate in our country.


Seamless welded steel pipe is a kind of around, square, rectangular steel with hollow section and no seams. Seamless steel pipe is made from steel ingot or solid steel blank which become hollow billet after punching, then pass through hot rolling and cold rolling or cold-drawing. Seamless steel pipe has hollow section, and is used as pipe for conveying fluid in a large number. Seamless steel pipes compared with round steel and other solid steels, has lighter weight when under the same bending resistance strength. It is a kind of economic section steel, which is widely used in the manufacture of structural components and mechanical parts, such as petroleum drill pipes, transmission shafts of motor vehicles, bicycle frames and steel scaffolds which are used in the process of construction technology.

Using seamless steel pipes to manufacture ring shaped work pieces can improve cyclic utilization rate of materials, simplify the manufacturing process, save materials and processing working hours. Rolling bearing rings and knots of jack have been widely made with seamless steel pipes as raw materials. Seamless steel pipes are indispensable materials for the manufacturing of all kinds of conventional weapons, such as gun barrels and cannon holder. Seamless steel pipes can be divided into circular pipes and special pipes according to the cross-sectional areas in different shape. Due to the areas of a circle is the largest under the conditions that perimeters are equal, so using round pipes can deliver more fluid. In addition, the annulus cross sections have uniform stress when bearing inside or outside radial pressure. Thus, most of the seamless steel pipes are round pipes.


1. Seamless steel pipes have a wide range of applications. General-purpose seamless steel pipes are rolled by ordinary carbon structural steel and low alloy steels or structural steels with low alloy or structural alloy steels. They have large yield, and are mainly used for pipes which convey fluid or structural components.

2. The seamless steel pipes can be classified into different categories in accordance with their different applications, mechanical properties, water pressure test and chemical composition and so forth.

3. Seamless steel pipes which have the specialized uses have seamless steel pipe used in boilers, seamless steel pipes used in geology and seamless steel pipes used in oil.

The black steel pipe and API steel pipe are also available.

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