The valve’s seat design incorporates a soft insert for initial sealing and a metal backup for fire safety. API 6D mandates pressure testing at 1.1 times the rated pressure. Cryogenic testing verifies seal performance at -196°C. These features ensure zero leakage in LNG pipelines, protecting both equipment and personnel from hazardous releases https://globalsealstech.com/product-category/oil-gas-seals/api-6d-ball-valve-and-lng-seals/