Hydrogen System Components
Storage and handling of compressed hydrogen gas and cryogenic liquid hydrogen present potential health and safety hazards. Use of proper hydrogen system components is essential for a safe work environment. In this section, best practices for components are described for:
- Compressed Gas Storage – While cylinders may be stored indoors in small quantities, outside storage is generally safer.
- Compressed Gas Piping Systems - Recommendations for the design of compressed gas piping systems are provided.
- Compressed Gas Piping System Components – Recommendations for pipe fittings, valves, excess flow valves, and hoses are provided.
- Compressors – Considerations for the compressor installations are provided.
- Handling Cryogenic Liquid – Considerations for handling cryogenic liquid hydrogen that are in addition to those for handling gaseous hydrogen are described.
- Liquid Storage Vessels – Liquid hydrogen is usually stored in cylindrical tanks that are vacuum-insulated to minimize evaporation losses.
- Liquid System Pressure Relief – The expansion of liquid hydrogen and the ease at which the liquid can be vaporized present unique pressure relief requirements.
- Liquid Piping Systems – This section discusses considerations for liquid systems that are in addition to those for compressed gas systems.
- Liquid Piping System Components – This section discusses some specific considerations for liquid systems that are in addition to those for compressed gas systems.
- Vacuum Pumps – An introduction to vacuum pumps used to maintain insulating vacuum and purge hydrogen and associated purge gases from systems.