Wellhead equipment seals accommodate pressure ratings designated as 2M, 3M, 5M, 10M, 15M, and 20M where M represents 1,000 PSI working pressure. Seals must withstand hydrostatic test pressures of 1.5 times rated working pressure without leakage or permanent deformation. Temperature classes include K (-75°F to 180°F), L (-50°F to 180°F), P (0°F to 180°F), S (0°F to 250°F), T (0°F to 30... https://globalsealstech.com/product-category/oil-gas-seals/api-6a-wellhead-equipment-seals/