1.Outer Diameter:21.3mm-630mm 2.Wall Thickness:1.8mm-22mm 3.High quality and exciting price ASTM A53 ERW steel pipe1.Competitive ... Technology Co.,Ltd,as a leading ERW and SSAW steel pipe manufacturerin China. All these steel pipes are suitable for the ... ,electrical industry,steel structure ,building and otherrelated fields.Our steel pipe has been exported to many countries,such as UAE, Australia ...