Api Rp — 556 Pdf |link|

API RP 556 provides industry guidelines for the design, installation, and operation of instrumentation and control systems for gas-fired heaters in petroleum and chemical plants. The standard is currently transitioning to an eight-part document addressing safety requirements, including combustible limits and burner management systems. Review the technical details at Intertek Inform .

RP 556 is advisory; site-specific engineering judgment and compliance with mandatory codes are required.
It does not replace detailed electrical or fire protection codes—use in conjunction with those standards.
Some recommendations may need adaptation for small facilities, nonpetroleum applications, or regions with differing regulatory frameworks.

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Api Rp — 556 Pdf |link|

Operational Safety and Burner Management