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Defines specific fire zones (e.g., 7.6m vertically and 12.5m horizontally) to determine how much heat equipment might absorb during a fire.

: Outlines causes for overpressure such as external fire exposure, cooling failure, or control valve failure. Flare Systems api 521 free pdf

: API provides free, read-only online access to nearly 200 key industry standards, including those related to safety and process operations, via their IBR (Incorporated by Reference) Reading Room. Defines specific fire zones (e