Avoiding vibration-induced fatigue at compressor connections. Managing Hydraulic Shock
: Carbon steel is the standard for most industrial applications. Pipes typically conform to ASTM A53 Grade B (seamless or electric resistance welded) or ASTM A106 Grade B (seamless) for low-temperature service. Iiar Ammonia Refrigeration Piping Handbook Pdf
The chapter also includes critical guidance for vertical two-phase suction risers, where load variation and proper sizing are essential to minimize pressure drop and prevent flow reversal. Avoiding vibration-induced fatigue at compressor connections
Specifies that ammonia is incompatible with copper, brass, and zinc; systems must primarily use welded steel or stainless steel piping. The chapter also includes critical guidance for vertical
| Feature | IIAR 114 | ASME B31.5 | EN 13458 (European) | |---------|----------|------------|----------------------| | Ammonia-specific | Yes (detailed) | General refrigeration | Yes | | Slope requirement | 1/8" per ft min | Not specified | 0.3% min | | Impact testing temp | -20°F | -20°F | -10°C | | Leak rate limit | 0.1 oz/yr per fitting | Not given | 0.01 mg/s per joint |
The handbook covers several critical areas of system architecture: