Cryogenic testing of complete packing assemblies at -196°C with liquid nitrogen verifies performance before shipment. Only systems maintaining torque within ±15% of ambient values and zero visible leakage are accepted for critical LNG service, ensuring first-time success during plant commissioning. https://globalsealstech.com/product-category/oil-gas-seals/api-6d-ball-valve-and-lng-seals/