... customize 5.advanced equipments 1.product name : High quality welded steel pipe2. thinckness:0.1-3.0mm3.OD:10-300MM4.market ... are mainly manufacturing welded steel pipe , hot rolled steel pipe ,cold rolled steel coil ,black steel pipe , black steel coil,galvanized steel pipe , galvanized steel coil ,cold hard steel pipe , ... contact me.Looking forward to your reply . High quality welded steel pipe