API 6D standards require rigorous testing of ball valve seals to verify performance and reliability. Testing includes pressure, leakage, and functional evaluations. LNG seals may also undergo cryogenic testing to confirm low-temperature performance. These tests ensure seals meet safety and quality requirements. Certified testing builds confidence in seal reliability before deployment ... https://globalsealstech.com/product-category/oil-gas-seals/api-6d-ball-valve-and-lng-seals/