– Lists acceptable pipe materials (e.g., ASTM A53 Grade B, seamless only above 6 inches). Forbids copper, brass, or galvanized steel due to corrosion.
Guidance on using high-quality carbon steel pipes and copper-free alloys to prevent the corrosion commonly caused by ammonia. iiar ammonia refrigeration piping handbook pdf link
Pipe Labeling: Requirements for color-coding and flow direction arrows. – Lists acceptable pipe materials (e