High Pressure ASME API Flange Gasket 1. Octagonal, Oval or lens 2 ... 3. R11-105,RX20-215 BX150-303 4.Swift Delivery High Pressure ASME API Flange Gasket1.shape: Octagonal, Oval or lens2.type ... B16.20 HG20612 HG206337.Material: carbon steel, soft iron, inconel600, M-400, C-276, and so on8. Application: W/N flange ... with API Standard and meet our customer's demands. High Pressure ASME API Flange Gasket