... flanges for the Petrochemical, Process, & Waterworks industries. ANSI, API, AWWA p . Plate Flange Product Description: 1), Sizes: from DN10 to DN3000; 2 ... use; 4), Types: WN, SO, BL, Plate, Thread, Socket and etc; 5), Process: free forging, plate cutting; 6), Packing: in wooden cases ...