... 1)standard:GB,ASTM ,DIN, 2)grade:10#,20#,45#,16Mn 3)od :2-316mm thickness:1.2 ... -12mm SPECIFICATIONS1)spiral wels steel pipe as per 10#20#,45#,16Mn 2)Standard & material :GB,ASTM , DIN ... 1.2-12mm,length :5.8m,6m,11m4)method of galvanizeation: cold drawn5) surface: print protect,ends beveled ... long time business cooperation with you on the base of mutual profits. Address: No.14,District2,Dadong Steel ...