... ,seamless stainless steel pipes,welded Stainless Steel Pipe and so on .carbon steel pipe: 1) Material ... : Q195,Q215,Q235,Q345,20#,30#,45# and so on . 2) Standard: GB/T6728-2002 ... Process method:cold rolled hot rolled welded seamless galvanized and so on . 4) Out diameter: 10*10- ... machinery, container rall structure, airport structure , shipbuilding and so on . 10) Packing: in bundles or ...