There are generally four processing methods for titanium welded pipes:
Pressed and welded titanium pipe
Compared with the multi-seam "shrimp" type, this titanium pipe has fewer welds, but the pressing process is more complicated, requiring a large number of molds, consuming more materials and processes. The welds will also affect the corrosion resistance and the appearance is not ideal.
Multi-weld type (commonly known as "shrimp waist" type) titanium tube
Its processing technology is complicated. It is usually cut into multiple oblique sections and welded together, or the plate is expanded into multiple sections and then rolled and welded. This method has a lot of scraps and a large number of welds. The weld will greatly reduce the corrosion resistance, easy to leak, and the appearance is poor. The inner surface is a folded surface, which increases the pipeline transmission resistance and increases the erosion corrosion on the back, thus reducing the service life.
Stamped titanium welded pipe
The appearance of this titanium tube seems to be no different from the pushed titanium tube, but the processing technology is to stamp the tube blank in the stamping die on the punch. During the forming process, the back of the titanium tube is pulled and forced to be thinner. The inner tube wall is compressed and thickened, resulting in uneven wall thickness or wrinkling. In addition, the back of the titanium tube is subjected to erosion and corrosion during use. Since the back wall is thin and prone to premature damage, the overall life of the pipeline is greatly reduced.
Cast titanium tube
Although it is a seamless titanium tube, the wall thickness (at least 5mm) does not match the pipe wall thickness (2mm~4mm), which increases the transmission resistance and the surface finish is poor. More importantly, there are a large number of defects such as pores caused by manufacturing inside, which seriously affect the corrosion resistance and life.
