Stainless Steel Welded Tube

What is a stainless steel welded tube, and what are its applications?

A stainless steel welded tube is a cylindrical structure made from stainless steel formed by welding processes. It is created by joining two or more stainless steel strips or plates through various welding techniques, such as TIG (Tungsten Inert Gas) or laser welding. This welding process ensures a strong and durable bond between the metal components, resulting in a seamless and continuous tube.

Stainless steel welded tubes find a wide range of applications across various industries. They are commonly used in the construction and architectural sectors for structural purposes, including handrails, balustrades, and supports. These tubes are also extensively utilized in the automotive industry for exhaust systems and mufflers and in the manufacturing of heat exchangers, condensers, and boilers. Stainless steel welded tubes are employed in the food and beverage industry to transport fluids, such as milk and dairy products, as they offer excellent resistance to corrosion and can maintain hygiene standards. Moreover, they are used in the petrochemical and oil and gas industries for pipelines and transportation of corrosive substances, owing to their high strength and resistance to chemical degradation.

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What are the advantages of using stainless steel welded tubes compared to other types of tubes?

Stainless steel welded tubes offer several advantages compared to other types of tubes. First and foremost, they possess excellent corrosion resistance properties, making them highly durable and suitable for various environments, including those exposed to moisture, chemicals, and extreme temperatures. This corrosion resistance extends the tubes' lifespan, reducing the need for frequent replacements and resulting in cost savings.

Stainless steel welded tubes exhibit superior strength and structural integrity due to the welding process, providing robustness and reliability in demanding applications. The welded joints offer a seamless and continuous tube, ensuring smooth fluid flow and minimizing the risk of leakage. That makes them ideal for applications requiring high pressure or the transportation of volatile substances.

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Preparing The Sheets

Before being selected to roll, the stainless steel sheets go through a number of inspections. Trimming them around the edges is the first step in preparing them.

Rolling Through Rollers

The desired size is then achieved by running the sheets through many rollers. You can see the sheets evolving into tubular shapes in this stage.

Rollers Through The Fitted Welding Machine

The tubular shape must pass through a customised welding equipment in this step. You get precisely rolled tubes by removing the weld beads and scraps from inside these tubular shapes.

Welding Process

The grade and application requirements have an impact on tube welding and forming. For the manufacturing of tiny diameter tubes, we employ TIG welding. Steel sheets are coiled and welded inside of a welding machine. The steel sheets are shaped into a coil before entering the machine. The seam between these coils is then welded to create a tube.

Electric Resistance Welding (ERW) Process

Tube is made using the Electric Resistance Welding (ERW) technique, which involves cold-forming a flat sheet of steel into a cylindrical shape. The steel is then heated by applying current to either of the cylinder's edges, forcing the edges to bond together firmly without the use of welding filler material.

Submerged Arc Welding (SAW) Process

An arc is created between a workpiece and a continuously fed bare wire electrode during the Submerged Arc Welding (SAW) procedure. Additionally, flux is used to create slag, produce protective gases, and provide alloying materials to the weld pool. Gas shielding is not required.

Electric Flash Welding Process

A steel sheet being transformed into a cylinder using the electric flash welding process. The edges are heated until they become semi-molten in this instance, and then they are pressed together until molten steel is squeezed out of the junction and forms a bead.

Annealing

Metal is heated above the point of re-crystallization and cooled to room temperature during the annealing process. The molecular bonds in metal tighten when it is shaped, making it rigid. The metal is put through an annealing process to regain its ductility.

Sinking Process

Tube sinking is a drawing technique that reduces the diameter of tubes. In this drawing technique, a tube is run through a die without the need of a mandrel. Good inner surface quality is not ensured when using a mandrel. The die angel determines the integrity of the outer surface. The die being used produces a uniform surface. A tube can be significantly smaller than it was originally. When cost is a factor, tube sinking is ideal.

Inspection and Testing

Before sending our items to our consumers, we conduct inspection procedures to verify their integrity.

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