Cryogenic testing of API 6D ball valves and LNG seals represents an essential validation step that verifies design adequacy and manufacturing quality before valves are approved for LNG service, with testing protocols simulating actual operating conditions including cryogenic temperatures, pressure cycles, thermal shock scenarios, and repeated operation under cold conditions. https://globalsealstech.com/product-category/oil-gas-seals/api-6d-ball-valve-and-lng-seals/