Ring Joint Seal Gasket 1.Type:R,BX,RX2,Size:R11-105,RX20- ... .Standard:API,ASME B16.20 4.All materials Ring Joint Seal Gasket1.Type: R,BX,RX2 Shape: octagonal, oval, lens3.Size ... /N flange, gate valve, oil&gas industry, oil christmas tree, wellhead assembly9.Hardness and Temperaturematerialmax hardness(HB)max temperature(degrees)soft ...