CFST, invested as a specialized manufacturer of high frequency electrical welded steel pipes/tubes, was developed on the basis of Hebei Changfeng Machinery Manufacturing Co., Ltd and Hebei Changzhou Steel Structural Engineering Co., Ltd. Till 2011, CFST has been the biggest and leading manufacturer of high frequency ERW steel tubes from 3" to 26"(89mm-660mm) and is one of the 3 Chinese manufacturers that can produce HFW/ERW steel tubes from 20" to 26"(508mm-660mm).
Best regards to you!