What are the special requirements for loading arms used for ammonia?
Loading arms for ammonia require special materials and design considerations to ensure safety and compatibility:
Material Compatibility: Use materials like stainless steel or carbon steel with specific linings to resist ammonia's corrosive properties.
Sealing: High-quality seals, such as PTFE or ammonia-resistant gaskets, are essential to prevent leaks.
Pressure Rating: The loading arm must handle the high pressure typically associated with ammonia transfer.
Temperature Tolerance: It should withstand the low temperatures of liquid ammonia and potential temperature fluctuations.
Safety Features: Incorporate emergency release couplings (ERCs) to prevent spills in case of accidental disconnection.
Compliance: Adhere to international standards such as ASME, EN, or local ammonia handling regulations.
Proper Testing: Perform rigorous pressure and leakage tests to ensure safe operation.
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