... shape: octagonal, oval, lens 3.size: R11-105 4.certificate:API 6A valve parts---ring joint gasketsAPI 6A ASME B16.20standardised productionSwift ... PN2.0(CLASS150)-PN42.0(CLASS2500) 6. standard: ASME B16.20 HG20612 HG20633 Material: carbon steel, soft iron, inconel600, M-400 ... 540304 600 316 450 9. APPLIANCE: W/N flange, gate valve, oil&gas industry, oil christmas tree, wellhead assembly, petrochemical ...