... saw pipes, oil pipes, ERW pipes, seamless steel pipes,elbow,reducer,tee,caps,flange,tube etc.. ... Flange Blind flanges are made of carbon steel,stainless steel and alloy steel,etc.They are used to seal ... , PN 320, PN 400 Flange sealing surface type U.S. Series: Flat (FF), suddenly face (RF), groove ... wooden pallets or as per customer's requirement ASTM A234 WPB carbon steel blind flange for high quality