Steel Knowledge

Rapid detection equipment and detection method in the production process of multi size thick wall rectangular tube

Application (patent) No.: CN202210257549.3 Application date: March 16, 2022 Publication/Announcement No.: CN114441352A Publication/announcement date: May 6, 2022 Applicant (patent right): Tianjin Bosi Testing Co., Ltd Inventors: Huang Yalian, Yuan Lingjun, Wang Deli, Yang Xueqiang Abstract: The i... Read More

Identification of fake and inferior rectangular tubes

The square tube market is a mixture of good and bad, and the quality of square tube products is also very different. In order to let customers pay attention to the difference, today we summarize the following methods to identify the quality of square tube products. 1. False and inferior rectangul... Read More

What is the difference between hot rolling and cold rolling?

The difference between hot rolling and cold rolling is mainly the temperature of rolling process. “Cold” means normal temperature, and “hot” means high temperature. From the viewpoint of metallurgy, the boundary between cold rolling and hot rolling should be distinguished ... Read More

Several Section Forms of High rise Steel Structure Members

1、 Axially stressed member The axial force bearing member mainly refers to the member bearing axial tension or axial pressure, which is the simplest one among the members. Read More

Yuantai Derun Steel Pipe Manufacturing Group – Square and Rectangular Pipe Project Case

The square tube of Yuantai Derun is widely used. It has participated in major engineering cases for many times. According to different use scenarios, its uses are as follows: 1. Square and rectangular steel pipes for structures, machinery manufacturing, steel construction and geological drilling,... Read More

How is the R angle of square tube specified in the national standard?

When we purchase and use square tube, the most important point to judge whether the product meets the standard is the value of R angle. How is the R angle of square tube specified in the national standard? I will arrange a table for your reference. Read More

What Is JCOE Pipe?

Straight seam double-sided submerged arc welded pipe is JCOE pipe. Straight seam steel pipe is classified into two types based on the manufacturing process: high frequency straight seam steel pipe and submerged arc welded straight seam steel pipe JCOE pipe. Submerged arc welded straight seam stee... Read More

Square tube industry tips

Square tube is a kind of hollow square section shape steel tube, also known as square tube, rectangular tube. Its specification is expressed in mm of outer diameter * wall thickness. It is made of hot rolled steel strip by cold rolling or cold drawing. Use of seamless square pipe: Seamless square... Read More

What are the main cutting methods for rectangular tubes?

The following five cutting methods of rectangular tubes are introduced: （1） Pipe cutting machine The pipe cutting machine has simple equipment, less investment, and is widely used. Some of them also have the function of chamfering and automatic loading and unloading and aggregate devices. Pipe ... Read More

What is the cause of square tube cracking?

  1. It is mainly the problem of base metal. 2. Seamless steel pipes are not annealed square pipes, which are hard and soft. It is not easy to deform due to extrusion and is impact resistant. High reliability of installation, no embrittlement under gas and sunlight. 3. Weather resistance and... Read More

What factors will affect the feeding accuracy of square tube?

During the production of square and rectangular tubes, the feeding accuracy directly affects the accuracy and quality of the formed products. Today we will introduce seven factors that affect the feeding accuracy of rectangular tube: （1） The center line of the feeding device and the center line... Read More

Dn、De、D、d、 Φ How to distinguish?

Pipe diameter De, DN, d ф Meaning Read More
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