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API RP 565-5 1st Edition

Instrumentation, Control, and Protective Functions for Gas-Fired Heaters--Main Burner Ignition Criteria
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This document contains recommended practices and background information on main burner ignition for new gas-fired heaters designed, operated, and safeguarded in accordance with API standards.

RP 556-5 focuses on main burner ignition criteria for gas-fired heaters:
  • that are designed according to the latest editions of API 535 and API 560;
  • that have instrumentation, controls, and protective functions in accordance with the respective parts of API 556;
  • for which the fireboxes are already purged prior to introducing ignition sources in the firebox and pilot burners (if fitted) are in service.
SDO API: American Petroleum Institute
Document Number RP 556-5
Publication Date March 1, 2026
Language en - English
Page Count
Revision Level
Supercedes
Committee
Publish Date Document Id Type View
March 1, 2026 API RP 565-5 1st Edition Revision