Cangzhou Zhongshun Steel Pipe trade Co.,Ltd. is a large-scale materials circulation enterprises. To achieve one-step service,we are working together to achieve the strategic partner with a number of companies. The mainly product: welded steel pipe,spiral steel pipe,seamless steel pipe,square steel pipe ,galvanized steel pipe,elbow,flange and so on.Also can produce diameter(21.3-457.2mm) thickness of wall(1.8-14.27mm) of (ERW)electric-resistance welded steel pipe,.diameter(219-3020mm) thickness ...