... Material :Carbon steel ,stainless steel, alloy steel Type150lb threaded steel so flangeStandardANSI:ANSI B16.5ANSI B16.47MSS SP44ANSI B16 ... -80,GOST12821-80 TypeWelding Neck Flanges, Slip on Flanges, Threaded Flanges, Socket Welding Flanges, Blind Flanges, Orifice Flanges, ... looking forward to your inquiry,thankswww.qxpipeline.com Varieties: Threaded Flange, Slip-On Flange (SO), Socket Welding Flange, ...