... 3.OD:21.3-800MM WT:2.2-46MM Welded steel pipe OD:1/2''-24'', Thickness:2.2-46mm Grade:Q195/235/345,SS400Detailed ... ) High-frequency welded3) Outer diameter:21.3-800mm;Thickness:2.2-46mm,Length:2-12mm4) Steel grade:Q195/235/345,SS400,SS500,ST37 ... , gas and oil2.For constructionMain market:USA,Middle east,North and South America, East and West Europe, South and southeast Asia,Australia,Africa ...