... RX20-215, inch 1/2''-inch24'' 3.Standard:API,ASME B16.20 4.All materials Ring Joint ... -215 BX150-303, inch 1/2-inch244.Certificate:API 6A, ISO9001:20005.Pressure: PN2.0(CLASS150)-PN42.0 ... , inconel600, M-400, C-276, 10#,ss316,ss304.8.Application: W/N flange, gate valve, oil&gas industry ... )max temperature(degrees)soft iron90450carbon steel120450F51150540304160600316160600 API 6A Seal Ring Joint Gasket