... : 3 / 8 "~ 100" DN10 ~ DN2500 Pressure U.S. Series: CLASS 150, CLASS 300, CLASS 400, CLASS 600 ... PN 400 Flange sealing surface type U.S. Series: Flat (FF), suddenly face (RF), groove (G), convex surface (MFM ... ), ring joint face (RJ)Packing:wooden cases or wooden pallets or as per customer's ... requirement cl150 rf blind flanges