Stainless Steel Welded Tubes and Pipes Division has two welding lines for manufacturing welded tubes and pipes. Stainless Steel Welded Tubes/Pipes are manufactured on Continuous Tube Mill using Multitorch TIG (Tungsten Inert Gas) welding process. Prime quality stainless steel strips having trimmed edges are fed to the tubes mill after thorough quality checks. Strip passes through various sets of rollers fitted in mill as per the required size. This strip is gradually converted in to a tabular shape. The Edges are welded using TIG welding process by welding unit fitted on the mills the inside weld bid is instantaneously removed by online bid removing machine. Rolled Tubes/Pipes thus produced are cut to required length. This is further subjected to heat treatment (annealing) after proper cleaning to remove the stresses included while formation as well as welding and to restore the original grain structure.
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Heat Treatment is carried out on the continuous roller hearth furnace fitted with temperature controller and recorder. After heat treatment Tubes/Pipes are straightened and subjected to pickling to remove scale on the surfaces. In case the final size cannot be produced from the mill directly, the same is produced by cold drawing operation. To make the tube/pipe suitable for cold drawing, it is coated with oxalate & shop solution which acts as a lubricant and reduces friction while drawing. In the drawing operation, the tube/pipe is drawn over the draw bench using precision tooling i.e. Dies Plugs as per the requirements of finished size. The drawn tube/pipe undergoes heat treatment, pickling and other operations as specified above after surface cleaning.
Finished pipes/tubes are marked with computerized ink Jet Marking Machine. Each pipe/tube is marked as 'Manufacturing Standard'. Grade of Material, Size, Heat No., Stamp of third party inspection agency to Correlate with our Test Certificate. Finished tubes/pipes thus produced undergo various testing and quality checks followed by proper packing and dispatch.
Stainless steel tubes are often used in applications that need the advantages of stainless steel material ' low maintenance, corrosion-resistance, and versatility. Tubing can serve many purposes across a variety of industries, with two major types of stainless steel tube: welded and seamless. Here, Atlantic Stainless covers the production process and the main differences between these types of stainless steel tubing.
Raw material begins in the form of hot extruded seamless pipe, which is then cold reduced and processed through tube reducers in a long, straight form. Cold reducing is the most effective manufacturing method for longer lengths of tubing. Rolled pipes are cut to the required lengths and cleaned to remove debris in preparation for heat treatment, which is applied to remove any stresses that could occur during the formation or welding process.
Various heat treatments can be used for tubing manufacturing, particularly annealing ' this improves the structure of the metal and makes it more ductile for use in applications.
Welded stainless steel tubing is provided to the manufacturer in coils, which are then processed to improve the finish, remove debris, or for any alterations needed in the end product. Once the initial processing is complete, the coil is run through rollers to form the shape and prepare for welding.
Welded tubing can be either hot or cold-formed, and the finished results will differ depending on how it's been prepared ' for example, cold-formed stainless steel has a smoother finish and closer tolerances than hot-formed stainless steel. That said, regardless of how it was formed, the welding process will remain the same. The steps are as follows:
Seamless stainless steel tubing can be manufactured using a variety of methods, including piercing, gun drilling or extrusion.
Piercing: Uses a metal bar as its base material which is pierced with holes, then heated and rolled into a tube form.
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Gun Drilling: This method produces the best quality tubes that typically outperform tubes produced by other means. It requires a round metal bar be inserted into a straight flute drill.
Extrusion: A steel bar is fed into a tube and worked through a die, which is both effective and efficient, although this process requires additional preparation than the other two tubing methods.
In some cases, cold forming can be utilized if the tubing has a more rare composition or unique dimensions ' these methods include cold drawing and cold pilgering.
Cold Drawing: Involves using a die to alter the tube's overall shape.
Cold Pilgering: Reduces the wall thickness of the tubing or piping.
Both of these cold forming processes typically aren't necessary when manufacturing steel tubing, but when and if required by specific applications, are the preferred standard cold forming methods.
As aforementioned, there are numerous benefits to using stainless steel for your applications. The material's extreme versatility and resistance to corrosion is hard to match, which is why there are so many industries utilizing it, including but not limited to:
Atlantic Stainless is a renowned distributor of stainless steel tube, bar, sheet, plate, pipe, beam, channel, and hardware. As stainless steel suppliers, we proudly offer a huge variety of high-quality products and unmatched expertise in our services.
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