... 1000*1000mm 3.Thickness:0.5mm to 20mm ERW welded steel tube for gas/oiled/water/constructionO.DO.D toleranceW.TThickness Tolerance10 ... For constructionMain market:USA,Middle east,North and South America, East and West Europe, South and southeast Asia,Australia,Africa,Place of ... . 519, North Century Non-Ferrous Metal Second Market, 6th Steel Road, Xiazhuzhuang, Wuqing District Square Steel Tube