Cangzhou Zhongshun Steel Pipe trade Co.,Ltd is a professional  manufacturer for producing various kinds of  steel pipes with many years.The mainly product: welded steel pipe,spiral steel pipe,seamless steel pipe,square steel pipe ,galvanized steel pipe,elbow,flange and so on by the standard of API,ASTM,EN,JIS,BS,Din,GB and so on. Steel grade: GR.A, GR.B, X42-X80, H40, J55, K55, S195T, S235JRH, S355JOH, ST33, ST42, STK400, STK500, Q215, Q235, Q345etc.