Shenyang Dongyang Special Section Tube Co., Ltd (TTS ) is a joint venture company invested by Northeastern University and Toyo Superior Steel Tube Works Ltd(TTK) founded in 1991. The modern company, located in Shenyang City,Liaoning province ,China ,covering a total plant area of more than 15000 square meters, with an annual output capacity of 20000 tons, is mainly engaged in the production of more than 2000 kinds of the seam and seamless structure steel tubes with the compound sections, such as square, rectangle, ellipse, semicircle, arch, sector, triangle, hexagon and octagon, etc. The products also include various sealed section productions.