The Petrochemical, Process, and Waterworks industries. ANSI, API, AWWA pipe flanges in carbon steel , stainless steel , alloys and chrome steel. Weld Neck, Slip on, Blind, Threaded, Socket Weld, Lap Joint, Orifice Flanges, Ring, and custom flanges in sizes 1/2" to 203". Pressure classes - 75, 125, 150, 175, 250, 300, 350, 400, 600, 900, 1500, 2500, 5K, 10K, 15K, 20K. High Yield - Low Temp.