Tianjin City Tian Yi Seamless Steel Tube Manufacturing Co., Ltd is a factory that specializes in seamless steel pipes, located in Tianjin, covers 66700 square meters area, gross investment 93 million, permanent assets occupy 63 million. We are specialized in manufacturing seamless carbon steel and alloy steel tubes complying with the specifications GB, ASTM/ASME, API, JIS, DIN, and BS. The annual output are over 100,000MT, annual sales revenue 650 million. The dimension is with outside diameter of 16mm - 426mm and wall thickness of 1-36mm. Our products are widely used in petrochemical, machinery, shipyard, power station, boiler, and heat exchanger. Our main manufacturing equipment include gasogene stoves,dim:14.5 circular heating stoves, punch machines, A-R stretched machines, vertical straightening machines and so on. circular heating stoves possess many merits, such as symmetrical temperature when heating, lower energy source and metal consuming and so on; billet perforation adopt German advanced technology and select fungiform punch with big extending quotiety and high precision on size. The company has obtained the American Petroleum Institute's certificate and API certificate for API 5B, API 5L and API 5LD.We make use of the advantageous geography environment of Tianjin-Tianjin is the production base for seamless steel pipes, at the same time it also is the base for the petroleum pipes. Our company always insists on the management concept of "quality first and customers supreme" and "improve constantly the quality management system". At the same time, we also can supply other construction products, like heating insulation products, such as rock wool roll, rock wool board, the range of specifications are wide, spreaded to most of areas in the world. We sincerely hope to cooperate with friends in all circles at home and abroad, and keep our promise and faith to realize the mutual benefit and get more progress.