Features: 1) Manufactured to accord with ISO9001, ASTM, ANSI, API, JIS, DIN, EN, BS, UNI, NFA, GB and SY/T Standard 2) Applications: bicycle and automobile used steel tube, chemical and fertile used steel pipe, power plant used steel tube, and other structural used steel pipe 3) Light, strong or bendable, cold-drawn, cold-rolled, hot-rolled, welded, seamless