IIAR Ammonia Refrigeration Piping Handbook is a definitive technical guide for the design and installation of ammonia refrigeration systems. While some educational modules or specific chapters may be available as reference documents through public agencies, the complete handbook is a proprietary publication that must be purchased through the International Institute of Ammonia Refrigeration (IIAR) or authorized distributors. Official Purchase and Access Links IIAR Publication Store
By respecting the standard’s value and accessing it legally, you not only protect yourself from outdated or corrupted files but also support the continued work of the International Institute of All-Natural Refrigeration—ensuring the next edition (IIAR 2-2026) will be even better.
Best Practices
: For specific applications involving Direct Expansion (DX) ammonia, the Colmac Piping Handbook provides specialized piping diagrams and calculations. Associated Standards
Efficiency – Properly sized piping reduces pressure drop, lowering compressor energy costs by 5–15%. The handbook gives you the formulas and friction loss data to optimize your system.
Poor welds are a primary cause of ammonia leaks. This section covers: