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Four processing methods of titanium welding pipe

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[Abstract]:
The processing of titanium welding pipe is the seamless titanium pipe as the blank. In the special pushing extruder, the blank with pipe diameter less than the finished diameter is used. In the forming process, the pipe billet expands. The stress analysis shows that the stress is different in different parts, but it is always stretched under bidirectional compression, namely axial compression, radial compression, and circumferential tension
  1. Die welded titanium pipe: compared with the multi-seam "shrimp" type, the titanium pipe has less weld, but the more complicated the die process, requires a lot of molds, consuming more materials and processes, the weld will also affect the corrosion resistance, and the appearance is not ideal.

  2. Multi-weld type (commonly known as " shrimp waist & quot; type) titanium pipe: its processing process is complex, usually using the pipe cut into multiple sections, welding into or plate into multiple sections of expansion material, and then rolled welding, this method has more leftover materials, the amount of weld is large. Because the weld will greatly reduce the corrosion resistance, easy leakage, and the appearance is not good, the inner surface is folded surface, increase the pipeline transmission resistance and increase the erosion of the back and reduce the life.

  3. stamping titanium welding pipe: the titanium pipe appearance and push titanium pipe seems to have no difference, but the processing process is the billet in the stamping mold on song stamping molding, titanium pipe in the process of the molding of the back, and forced the back thin, the inner pipe wall compression and thickening caused uneven or wrinkle, and using titanium pipe back erosion corrosion, due to the back wall thin early damage, make the overall life of the pipe is greatly reduced.

  4. Casting titanium pipe: although there is no seam titanium pipe, the wall thickness (at least 5mm) and it cannot match the pipe wall thickness (2mm~4mm), so as to increase the transmission resistance, and the surface finish is poor, more importantly, there are a large number of internal stoma defects produced by the manufacturing, which seriously affect the corrosion resistance and life.