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ERW steel pipe and seamless steel pipe difference
Source :本站   Time:8/9/2017 9:44:24 PM   hit:

  ERW steel pipe and seamless steel pipe difference

  ERW steel pipe and seamless steel pipe is the biggest difference between ERW has a weld, which is the key to the quality of ERW steel pipe. Modern ERW steel pipe production process and equipment, due to the international community, especially the United States and other years of unremitting efforts, making the ERW Steel 24 Inch Steel Pipe has been more satisfied with the solution. Some people are ERW steel pipe seamlessly divided into geometric seamless and physical seamless. Geometric seamless is to remove ERW steel pipe inside and outside the burr. As the structure of the inner burr removal system and the continuous improvement and improvement of the tool, the clearance of the burrs in the large and medium diameter pipes has been well handled. Burr can be controlled in the -0.2mm ~ O.5mm or so. Physical seamless means that there is a difference between the metallographic structure and the base metal inside the weld, resulting in a decrease in the mechanical properties of the weld area. It is necessary to take measures to make it uniform and uniform. The high temperature welding process of ERW steel pipe causes the temperature distribution gradient near the edge of the tube and forms the characteristic area such as melting zone, semi-melting zone, superheated organization, normalizing area, incomplete normalizing area and tempering zone.

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