Because of a great demand for PTA in domestic market, corporations in China set off a new fervor of constructing PTA project. Titanium-vessels in PTA equipment have a high demand in quality, and are obviously different from those used in other fields such as materials, fabrication and inspection etc. All sets of PTA equipment used in China were imported before 2001. With the technique of titanium-vessel improving, home-manufacturing of PTA equipment is becoming an inexorable trend. However, there are many problems to be solved in it.