WN flange:pipe flange, 1.stardard:ISO,ASTM,ASME,API,MSS,EN,BS,DIN, ... .material:alloy steel.stainless steel,carbon steel WN Flange 1.S235JR Carbon Steel Flange(UNI2276, UNI6083, UNI6089, UNI2280-2285, UNI2253, UNI6092 etc ... flange, carbon steel flange3.Pressure:PN6-PN1004.Size: 1/2"- 80", DN15-600, DN650-DN2000.5.Type: Plate, Slip On, Weld Neck, Blind ...