Cryonorm recently completed the replacement of an Ammonia Open Rack Heater (ORH) at an industrial facility on the French coast. Built to withstand the challenges of a marine environment, the new system delivers high capacity, proven reliability, and long-term durability, meeting the client’s exact requirements for their critical cryogenic process.
Project scope
The assignment covered the design, fabrication, and delivery of a fully shop-built, seawater-heated ORH. Key specifications included:
- Capacity: 26 tons per hour (2 × 13 t/h modular units)
- Operating pressure: Up to 40 bar
- Design standards: EN13445, Eurocode 9, ISO 14692
- Materials: Marine-grade aluminium and FRP components to ensure corrosion resistance
The modular two-block configuration allows flexible operation, enabling either full or partial load depending on seawater availability and process demand.
Technical execution
To ensure long-term performance and reduce installation time on-site, several design measures were implemented:
- Maximized shop fabrication to minimize field work
- Corrosion-resistant aluminium frame tailored for coastal conditions
- Protective coating system with over 20,000 operating hours in LNG service
- Zinc anodes for additional cathodic protection
- Optimized seawater distribution for consistent heat transfer
- Delivery under positive nitrogen pressure (-40°C dew point) to prevent internal icing
All equipment was manufactured in the Netherlands, tested under Cryonorm’s rigorous quality program, and shipped to France under DAP Incoterms. Third-party inspection was carried out by Lloyd’s, with full compliance to PED 2014/68/EU.
Results & impact
This successful ORH replacement highlights Cryonorm’s expertise in delivering technically advanced and highly reliable solutions for demanding environments. The system provides:
- Reliable ammonia vaporization in coastal conditions
- Extended service life thanks to durable materials and coatings
- Sustainable performance through efficient seawater heating
At Cryonorm, we combine engineering know-how, European manufacturing, and proven cryogenic technology to ensure consistent world-class performance, project after project.
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