Stainless Steel Tube – How Is It Made

A stainless-steel tube is an enclosed structure that is utilized for a variety of functional purposes. The shape of the stainless steel tube may be square, round or rectangular, depending on the specifications of the specific application. One inch of the round tube has one inch outside diameter, whereas one inch round pipe has one inch of inside diameter.

The reason for this is that the outside parts of the pipes are crucial in the construction of structures, while the internal parts of the pipes play an important role in the fluid flow. There are generally two main kinds of steel tubing which are seamless and weldable. You can find about them more in detail via

1. Seamless:

Primarily the manufacturing process of seamless tubing starts from an electric arc furnace. The steel is later cast in an ingot or cast repeatedly as a bloom. The latter is then rolled in a billet which later on becomes a tube by being drawn over a piercing tool with the help of two external rollers.

These rollers are set at an angle to each other which helps to move the billet. This is the point when a "rough" tube is formed. Then it is put in elongator, inside which, with the help of three rollers and an internal mandrel the tube is given a final outside diameter and wall thickness.

2. Welded:

This type of steel tubing is made out of either hot-rolled or cold-rolled steel which is poured in the tubing manufacturer in coils. If required the coil may be processed to remove unwanted scale and improve the finish. Then the coil is passed through grooved rollers till the shape is formed and the free edges are properly shaped for welding.

The external and sometimes the internal welding residue are removed after the edges of the tube are butt welded together. After all this procedure the tube is made to go through two semicircular rollers that help to bring the tube to its final required dimension.