1. Pressure plate welded titanium pipe: compared with multi-seam type, the titanium pipe has fewer welds. But the pressure plate process is more complicated, which requires a lot of molds, consumes more materials and processes. The weld will also affect the corrosion resistance and the appearance is not ideal.

2. Multi-weld titanium tube: its processing technology is complex. It usually uses the tube to be cut into a multi-section bevel, welded or multi-section unfolding material under the plate. And then be rolled welding. Because the weld will greatly reduce the corrosion resistance, easy to leak and poor appearance, the inner surface is folded, which increase the pipeline transmission resistance and increase the back erosion corrosion and reduce the life.

3. Stamping titanium welded pipe: The titanium tube titanium tube seems to be no difference between appearances and push system. But the process is to bloom on the punch in the stamping die stamping forming, forming process of titanium tube back tension and forced the thin back, caused by compression of the medial wall thickening and uneven wall thickness or crinkle. In the process of using titanium pipe back to withstand erosion, due to the back wall thin easy early damage, making pipe whole life greatly reduced.

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

The above titanium tube is far from meeting the current requirements and the advent of push titanium tube, is quickly accepted by users and welcomed because push titanium tube has its own characteristics.

Titanium welded pipe processing is no seam titanium pipe as the billet, in the special push extrusion machine using billet diameter is less than the finished product diameter push extrusion molding, in the process of forming, the tube billet expansion. Stress analysis shows that the stress is different in different parts, but under bidirectional compression, that is, axial compression, radial compression and circumferential tension, the stress is always stretched.