... Material :Carbon steel ,stainless steel, alloy steel Type150lb threaded steel so flangeStandardANSI:ANSI B16.5ANSI B16.47MSS SP44ANSI ... -80,GOST12821-80 TypeWelding Neck Flanges, Slip on Flanges, Threaded Flanges, Socket Welding Flanges, Blind Flanges, Orifice Flanges, ... , Loose Hubbed Flange, Welding Plate Flange, Welding Neck Collar, Welding-On Collar, Loose Plate Flange, Companion Flange, Plate (PL) ...