Size Flat welding flange: 3/8"~40" DN10~DN1000 Pressure U.S. Series: CLASS 150, CLASS 300, CLASS 400,CLASS 600, CLASS 900, CLASS 1500, CLASS 2500 European Series: PN 2.5, PN 6, PN 10, PN 16, PN25, PN 40, PN 63, PN 100, PN 160, PN 250, PN 320, PN 400 Flange sealing surface type U.S. Series: Flat (FF), groove (G), convex surface (MFM) |