– Lists acceptable pipe materials (e.g., ASTM A53 Grade B, seamless only above 6 inches). Forbids copper, brass, or galvanized steel due to corrosion.

Insulation Systems: Best practices for vapor barriers to prevent "corrosion under insulation" (CUI).

The handbook serves as the companion guide to the IIAR 2 standard. It provides:

Before diving into the Piping Handbook, it is crucial to understand the authority behind it. The is a non-profit trade association dedicated to the safe use of ammonia as a refrigerant. Their standards (e.g., IIAR 2, IIAR 3, IIAR 4, and IIAR 5) are recognized globally by OSHA (Occupational Safety and Health Administration) and building codes as the benchmark for safe system design.

The handbook serves as a comprehensive introduction to modern piping practices, focusing on: Design & Installation