Testing and qualification requirements per API 6A include pressure testing, temperature cycling, and functional testing under simulated service conditions. Seals must complete thousands of pressure cycles without leakage. Performance ratings (PR1 and PR2) define testing severity and qualification requirements. PR2 products undergo more stringent testing than PR1. Testing documentation... https://globalsealstech.com/product-category/oil-gas-seals/api-6a-wellhead-equipment-seals/