Wellhead equipment employs various seal configurations including O-rings, metal ring gaskets (RX, BX, R-oval), pressure-energized seals, spring-energized seals, and elastomer-bonded metal seals. Ring-type joint (RTJ) gaskets create metal-to-metal seals at flanged connections through controlled deformation into seal grooves. Pressure-energized seals utilize system pressure to increase ... https://globalsealstech.com/product-category/oil-gas-seals/api-6a-wellhead-equipment-seals/