Carbon Steel Pipe with High Quality 1.WT:4-70mm OD:25-370mm 2. ... , industrial dilivery(gas,water,oil)60-630×1.53-40 Rectangular TubeQ195,Q235,Q345,20#GB/T6278-2002 Structure, decoration, construction20 ... Carbon Steel Pipe, please visit: www.lcnsu.com Or contact with me: Alice JiaoMobile: +86-15263566370Skype: xinghuan.jiao Sell ASTM A53 ...