Four processing methods for titanium welded pipes
There are generally four methods for manufacturing titanium welded pipes:
1.Pressed Plate Welded Titanium Pipes: Compared to the multi-weld seam "shrimp waist" style, this type of titanium pipe has fewer weld seams. However, the pressing process is more complicated, requiring a large number of molds, consuming more material, and involving more steps. The weld seams still affect corrosion resistance, and the appearance is not ideal.
2.Multi-Weld Seam Style (commonly known as "shrimp waist" style): This method involves a complex manufacturing process, typically cutting the pipe into several sections with beveled ends and welding them together, or unrolling the pipe into multiple segments to be welded and then rolled into shape. This process generates a lot of waste material and has a large number of weld seams. The weld seams significantly reduce corrosion resistance, increase the risk of leakage, result in poor appearance, and cause the inner surface to be uneven, which increases the transmission resistance and enhances back erosion corrosion, thus reducing the pipe's lifespan.
3.Stamping Titanium Pipes: These titanium pipes look similar to drawn titanium pipes, but the manufacturing process involves stamping the pipe blanks into shape using a die on a stamping press. During this process, the backside of the pipe is stretched and thinned, while the inner side of the pipe is compressed and thickened, leading to uneven wall thickness or wrinkles. During use, the backside of the pipe is prone to erosive corrosion, and due to the thinness of the back wall, it can wear out quickly, which significantly reduces the pipe's overall lifespan.
4.Cast Titanium Pipes: Though these pipes are seamless, the wall thickness (at least 5mm) is not compatible with the pipe wall thickness (2mm–4mm), resulting in increased transmission resistance. Additionally, the surface finish is poor, and there are significant internal defects such as gas holes generated during casting, which severely affect corrosion resistance and lifespan.
The above methods of titanium pipes do not fully meet current requirements, which is why the advent of extruded titanium pipes has quickly been accepted and favored by users. Extruded titanium pipes are made from seamless titanium pipe billets, which are shaped in a specialized extrusion press, with the pipe's diameter smaller than the final product size. During the forming process, the pipe billet expands. Stress analysis shows that different parts of the pipe experience different stresses, but under biaxial compression (axial compression, radial compression, and circumferential stretching), the stress remains in a tensile state throughout the process.
XUYI TITAN, as the largest private titanium pipe/tube factory in China, which can offers high-quality and competitively priced titanium seamless pipes and welded pipes.
