... ) Outer diameter: 10-63mm,Thickness: 0.4 - 2.0mm ) Steel grade: Q195,Q235 Thin Wall High Frequency Welded Round Steel Tube ... , carbom steel pipe, gavanlized steel tube,chrome plated steel tube/pipe1) Thin Wall High-frequency welded2) Outer ... : 10-63mm,Thickness: 0.4 - 2.0mm, length<3m3) Steel grade: Q195,Q195L. Q2354) Standards: ASTM, JIS, DIN, EN, BS5) Used ...