... Socket Welding Flange, Alloy flange,Plate Flange wn ansi cl 1500 flange ANSI Flange Size:1/2" ~ 64"(DN15 mm ~ 1600 ... and Plate etc.Pressure Ratings:Class 150, 300, 600, 900, 1500, 2500 Pressure Ratings: PN 6, PN 10, PN16, PN25, PN40 ... control system which covers every process of the manufacturing-Raw material inspection, cutting, heating, gorging, heat treatment, machining, drilling, marking, washing ...