300 × 300 × 13 square pipe making machine is designed by our own factory for Yulong Precise Steel Pipe Company in Jiangsu China. This mill adopts flexible and empty curving forming and square forming technique. Square pipe making machine realizes all kinds of specification. It has the advantage of low investment, convenient adjustment and easy operation. 1400 × 14 cold roll forming steel production line is an advanced technology for Shanghai Oulingte Steel Plate Company. It adopts section arc flexible and empty curving forming technology. Cold roll forming steel production line has the advantages of long life, convenient adjustment, easy operation and high efficiency. .