As a  leading  Company to manufacture Welded/seamless Tubes,pipe fittings , valves and flanges, Tianyuan has the ability to manufacture high-specification tube from 4mm to 508mm OD for uses in every industrial field, such as chemical, petroleum, nature gas, shipbuilding, food, pharmacy, aviation, aerospace,etc. We are certified by the system of quality management of ISO9001-9002.We assure you the best quality of our products, the promptest delivery and the most competitive price.