This case study examines the June 8, 2022 explosion and fire at the Freeport LNG export terminal in Texas, which led to a multi-month shutdown of a critical LNG supply facility. The investigation found that a blocked relief valve—left closed after maintenance—caused low-order overpressure in an 18-inch recirculation line, leading to loss of primary containment and ignition from damaged electrical conduits. Human error, inadequate maintenance oversight, and insufficient response to prior equipment warnings were key contributors. The incident underscores the importance of relief device management, post-maintenance verification, and disciplined safety and maintenance procedures in LNG operations.

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