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About This Item


Full Description

This recommended practice addresses the permanent marking of liquid petroleum pipeline transportation facilities. It covers the design, message, installation, placement, inspection, and maintenance of markers and signs on pipeline facilities located onshore and at inland waterway crossings. Markers and signs indicate the presence of a pipeline facility and warn of the potential hazards associated with its presence and operation. The markers and signs may contain information to be used by the public when reporting emergencies and seeking assistance in determining the precise location of a buried pipeline.

Document History

  1. API RP 1109

    Line Markers and Signage for Hazardous Liquid Pipelines and Facilities, Fifth Edition

    • Most Recent
  2. API RP 1109

    Marking Liquid Petroleum Pipeline Facilities, Fourth Edition, Includes Errata (2010)

    • Historical Version
  3. API RP 1109


    Marking Liquid Petroleum Pipeline Facilities, 3rd Edition

    • Historical Version