What is a seamless square tube

What is a seamless square tube? A seamless steel tube is a cuboid tube with a hollow section and no seams around it. Seamless steel pipes are made of steel ingots or solid tube blanks that are perforated into capillary tubes, and then made by hot rolling, cold rolling or cold drawing.

The seamless steel pipe has a hollow section and is widely used as a pipeline for transporting fluids, such as pipelines for transporting oil, natural gas, gas, water and certain solid materials. Compared with solid steel such as round steel, seamless steel pipe is lighter in weight when it has the same flexural and torsional strength, and is an economical section steel.

People who have been engaged in the steel trade industry for many years basically know what products are seamless steel pipes and cold-formed square pipes, but it is estimated that few people know about seamless square pipes, and hot-rolled seamless square pipes.

Hot rolled seamless square tube

In the opinion of many hot-rolled section steel technicians, it is impossible to hot-roll this kind of hollow closed section steel, and even the semi-closed Halfen groove is difficult to roll.

Before 2000, there were very few relevant materials for hot-rolled seamless square tubes at home and abroad. Most of the seamless square tubes were cold-drawn or extruded. Baotou Steel successfully produced 140*140 *10mm seamless square tube.

The production process of Baotou Steel is to change the last two of the 12 micro-tension sizing units into four-roll mills on the original seamless steel pipe production line. This four-roll mill is actually a common universal mill for hot-rolled section steel. Steel pipe production The cross-border fusion of technology and section steel production technology.

Due to its structural characteristics, hot-rolled seamless square tubes effectively avoid the defects of performance degradation caused by welding connections. They are often used as pipelines for transporting fluids, such as pipelines for transporting oil, natural gas, gas, water and certain solid materials. Used in the manufacture of structural and mechanical parts such as oil drill pipes, automotive drive shafts, bicycle frames, and building construction.

The use of seamless square tube:

  1. For structure:

For general structure and mechanical structure

  1. Building steel structure:

For plant construction

  1. Mechanical manufacturing field and mechanical parts processing;
  2. Automobile industry (manufacturing truck body panels)
  3. Agricultural engineering (planting machinery).
  4. Important structural parts of other departments.
  5. It can be used instead of 40mm×40mm welded square tube.