API 6A RX and BX ring joint gaskets are precision-machined from 316SS, Inconel 625, or soft iron to seal flanged connections from 2,000 to 20,000 psi. BX gaskets incorporate pressure-energized sealing for subsea and critical HPHT surface applications where zero leakage is mandatory. https://globalsealstech.com/product-category/oil-gas-seals/api-6a-wellhead-equipment-seals/