Standard

API RP 555

Published

Note: This standard has a new edition: API RP 555

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Abstract

Process monitors that measure and transmit information about chemical composition, physical properties, or chemical properties are known as process analyzer systems. Many of these systems were first developed for laboratory analysis. Today they are primarily used as continuous online analyzers. A process monitoring system usually requires a sample extraction, transport, conditioning system, a process analyzer, and one or more data output devices. Properly designed systems also require overall considerations as to calibration, validation, utilities, sample disposal, safety, and systems packaging. Process analyzers measure chemical concentrations or physical or chemical properties that can be used as control variables instead of relying on indirect physical parameters, such as pressure, temperature, and inferred data from computer models. Process analyzer systems can provide a significant economic return when incorporated into process optimization and advanced control loops or when used for product quality control and process incident avoidance. This recommended practice does not address laboratory analyzers requirements.

Document information

  • Standard from API_AC
  • Published:
  • Version: 0
  • Document type: IS
  • Additional information
    • FOURTH EDITION