Plant engineers often ask: If I have NFPA 85 (Boiler and Combustion Systems Hazards Code), do I still need API RP 556?

If you want, I can:

: It typically does not cover oil-fired heaters, utility water tube boilers, or specialty heaters like CO boilers or ethylene furnaces, which may fall under other standards like Safety and Compliance Evolution

The 2nd Edition was published in April 2011 and remains the active version as of its 2024 reaffirmation. Standard Evolution: