... Range: WN flange, SO flange, SW flange, PL flange, BL flange, LJ flange, TH flange, Usage: Petroleum, chemical, power, gas, metallurgy, shipbuilding, construction, etc MATERIAL Stainless Steel Flanges ASTM ... 182 Grade: F 304, 304L, 316, 316L. Carbon Steel Flanges ASTMA 105/A694 F42/46/52/56/60/65/70 ... /A350/LF3/A350 LF2. Alloy Steel Flanges ASTM A182 F1/F5/F9/F11/F22/F91. ANSI B16.5 WN Flange RF