http://www.dingxinsteeltube.com/ China ST52 honed tube Company Introduction Certificate History Mission, vision, and values Zhejiang Dingxin Steel Tube Manufacturing Co., Ltd., founded in 2004, is a leading precision seamless steel tube manufacturer in China. Our factory locates in Jiaxing City, which is only 100 kilometers away from Shanghai. It covers an area of 25,000 銕?/span>, with an annual production capacity of 30,000+ tons. Dingxin tubes embody nearly 20 years鈥?experience in the manufacture of cold drawn and cold rolled precision seamless steel tubes. We manufacture according to industry highest standards and tested rigorously. It can meet the requirements of ASTM A519, DIN 2391, EN 10305-1, GB/T 3639, JIS G3445, etc. Capability Our facilities include some of the latest technology, up-to-date production and testing equipment. Thanks to our fully integrated in-house manufacturing process, from piercing, cold drawing, cold rolling, heat treatment to mechanical processing. We manufacture the most reliable tube products with high flexibility and deliver on time. Market l Automotive: tubing for steering and suspension systems, for drive train and power train components, etc. l Industry: cold drawn seamless tube/ honed tube for cylinder barrels, for piston