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About This Item


Full Description

RP 556 was written to aid in the installation of the more generally used measuring, control, and analytical instruments; transmission systems; and related accessories to achieve safe, continuous, accurate and efficient operation with minimum maintenance. Although the information has been prepared primarily for petroleum refineries, much of it is applicable without change in chemical plants, gasoline plants, and similar installations.

Document History

  1. API RP 556 (R2019)

    Instrumentation, Control, and Protective Systems for Gas Fired Heaters, Second Edition

    • Most Recent
  2. API RP 556


    Instrumentation and Control Systems for Fired Heaters and Steam Generators

    • Historical Version