European Seamless Steel Pipes
Steel pipes are a type of a steel tubular product that are produced according to various international standards such as API (American Petroleum Institute), EN (European Norm) and DIN (German Institute for Standardization), and have a wide range of applications. Among them, European seamless steel pipes have the characteristics of excellent dimensional accuracy, good surface quality and mechanical properties, and are widely used in the construction and engineering industries.
European seamless steel pipes are manufactured from various raw materials, including carbon steel, stainless steel, alloy steel, and aluminum. Carbon steel is the most commonly used material and is primarily used in the manufacturing of gas pipelines and low-pressure steam pipelines. While stainless steel is a type of alloy steel, which is mainly used in the manufacture of high-pressure steam pipelines, such as those used in power plants, petrochemical plants and oil refineries. Alloy steel is mainly used to manufacture pipes used in pipelines, flanges, boilers and valves. Aluminum alloy is used to manufacture pipelines for corrosive environments, such as chemical plants and refineries.
Manufacturing processes of European seamless steel pipes are mainly divided into two types: hot rolling and cold drawing. Hot rolling is a process in which the pipe is heated and rolled into a pipe shape, while cold drawing is a process in which the pipe is drawn into a pipe shape through a machine. Both processes require high precision in order to ensure the quality of the pipe. The outer and inner tolerances are both within a certain range.
The widely used process of European seamless steel pipes is cold drawing. This process consists of five steps: forming, welding, round rolling, pipe spinning and straightening. During the forming process, a thick-walled tube is made from the steel ingot in a certain shape. In the welding process, two ends of the tube are welded together, while in the round rolling process, and the tube is made into a round shape. In the pipe spinning process, the round tube is sliced into a thin-walled circular pipe, while in the straightening process, the pipe is straightened and subjected to exterior and interior inspections to ensure high quality.
In addition, European seamless steel pipes can also be made in accordance with different international standards. For example, there are European standards EN10255, EN10216-1, EN10217-1, EN10210-1, and EN10297-1, German standards DIN1629, DIN2448 and DIN2458, as well as Russian standard GOST8731. Each standard has different requirements for the pipe wall thickness, mechanical properties, and chemical components.
To ensure the quality of European seamless steel pipes, a variety of non-destructive testing methods may be employed, such as eddy current testing, hydrostatic testing, ultrasonic testing, magnetic particle testing, and radiographic testing. Furthermore, a strict quality control system is also necessary to ensure that the pipes meet the required specifications.
European seamless steel pipes are widely used in many industries, such as engineering, construction, petrochemical, and power generation. These pipes offer numerous advantages, such as high strength and stiffness, excellent dimensional accuracy, good weldability, and exceptional corrosion resistance. As such, they are essential components in many projects, making them essential to the global economy.
