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IIAR Pipe Marking Labels

03 February, 2023


Is this label compliant? How do you know? Can you point out what needs to change?

The IIAR, or International Institute of Ammonia Refrigeration, requires thorough and specific labeling of all pipes and ducts that contain ammonia based refrigerants.

Each label is required to include the following components:

  • Abbreviations for ammonia system components
  • The physical state (either liquid, vapor, or both)
  • The marker body containing the word "ammonia"
  • The Pressure level (either High or Low), and
  • The flow direction

If your facility uses ammonia-based refrigeration systems-follow the link, fill out the form and receive your free Ammonia Pipe Marking Quick Reference Guide.