Manufacturing Methods for Structural Steel Tubing

Structural steel tubing is generally used to stabilize buildings and walls during construction. These steel tubes help provide support and structure to buildings that otherwise could have structural issues, such as buildings with a lot of windows or buildings made from lightweight materials. The structural steel tubing helps stabilize the building, wall, fence, or other object and makes it safer for use by everyone.

There are three main methods used to create steel tubing for each of the different shapes and uses. Steel tubing is typically made by submerged arc welding, form square weld square processing, or electric resistance welding. Each type of welding is used to produce a different type of support profile.

Submerged arc welding: In submerged arc welding, two flat strips of steel are placed into a press brake. The press brake forms the two pieces of metal into identical halves. The two halves of the metal both receive a stabilizing backer bar to make the joint stronger. The joints are then welded together to create the final shape.

Form square weld square processing: The form square weld square processing method is different from the other two shaping methods. In this process, a heated flat sheet of steel is shaped into a square or rectangular shape using driven forming dies. The dies gradually bend the flat metal into a 3D shape. The seam of the metal is high-frequency welded into place during the shaping process.

Electric resistance welding: During this process, a flat strip of steel is rolled into a circular shape in a roll-forming machine. Once the steel has a rounded shape, the edges are heated and welded together through induction or contact welding. From there, another set of cold-forming rollers can transform the cylindrical shape into different diameters, squares, or rectangle shapes.

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