flexible exhaust pipe material: Q195,Q215,Q235,Q345, ... Stainless Steel Pipe,Stainless Steel Pipe,seamless stainless steel pipes,welded Stainless Steel Pipe and so on .flexible exhaust pipe: 1) ... to customer'schemical component. 3) Process method:cold rolled hot rolled welded seamless galvanized and so ... to prevent rust. 9) Application: square steel pipe can be used in construction structure machinery, ...