Future parts (like Part 7 and 8) are planned to cover oil-fired heaters and steam methane reformers by 2028. API RP 556 (R2024) Most Recent - Accuris Standards Store

: Outlining the requirements for Safety Instrumented Systems (SIS) and Burner Management Systems (BMS), including necessary interlocks to mitigate hazards like loss of process flow. Excluded Equipment

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Ovens or furnaces used for incineration or oxidation (covered by NFPA 86 ).

As of 2025, the most current version is . There is also an addendum from 2020. When searching for an API RP 556 PDF , be wary of outdated first edition copies from 2011 circulating on file-sharing sites. The second edition includes significant changes: