... oil pipes, ERW pipes, seamless steel pipes,elbow,reducer,tee,caps,flange,tube etc.. Size:DN15-DN1200Type: ... DIN, ENQuality: ISO9001-ISO2000Blind Flange Blind flanges are made of carbon steel,stainless steel and alloy steel,etc.They are used to ... PN 160, PN 250, PN 320, PN 400 Flange sealing surface type U.S. Series: Flat (FF), ... 's requirement ASTM A234 WPB carbon steel blind flange for high quality