Stainless Steel Flange 1.Size:1/2"(DN15) to 48"(DN1200) 2.Pressure:class150-class2500 3.Standard:ASME,ANSI,API,DIN,BS,GOST Stainless Steel Flange MaterialCarbon Steel:A105(N) C22.8 ST-37.2 S400 S440 SQ235(CS20#) A106B A53 Q345 Stainless Steel:304 316 304L 316L A350LF2 A182 Alloy Steel: ASTM A182 F1, F5a, F9, F11, F12, F22, F91 Size1/2"-48"PressureClass150, 300, 600, 900 1500 and 2500PN6, PN10, ...