RTJ GASKET ACCORDING TO ASME B16.20 & API 6A R/RX/BX gasket ring 1.R,RX,BX type ... -105,RX20-215 BX150-303, inch 1/2-inch244.Certificate:API 6A, ISO9001:20005.Pressure: PN2.0(CLASS150)-PN42.0(CLASS2500)6 ... /N flange, gate valve, oil&gas industry, oil christmas tree, wellhead assembly