In March 2024, Xinguangzheng delivered a 120x70x12m steel structure seafood freezing plant located in Dar es Salaam, Tanzania, designed specifically for marine product processing solutions. This plant adapts to Tanzania’s coastal climate and fishery demands, achieving rapid freezing design and efficient export support systems.
Customer Demand
Our client is a Tanzanian fishery export group, primarily handling Indian Ocean catches such as tuna, shrimp, and swordfish, headquartered in the Dar es Salaam port. With the development of East Africa’s blue economy, the client’s processing needs have expanded dramatically: existing factories struggle to integrate fishing vessel seasonal peaks and species diversity. Meanwhile, Tanzania’s marine conditions amplify challenges, including tropical tidal surges with an average annual humidity of 90%, sea salt corrosion, and regional earthquake and coral reef vibration hazards.
Through multiple communications, the Xinguangzheng team proposed a matching cold storage construction solution:
- Marine capture anchoring: Covering at least 8400 square meters, supporting flash freezing tunnels and species isolation areas.
- Swift tidal delivery: Project limited to within 6 months to match fishing season cycles.
- Coastal ecological protection: Structure salt-proof and earthquake-resistant, incorporating ozone purification to reduce odor pollution rates by 50-60%.
- Fishery streamlining: Configuration allows for later marine expansions, such as adding tracking scanners or wave power generation.
Solutions
Xinguangzheng focuses on marine metal protection and tidal integration for the seafood freezing project. The plant adopts a marine-grade steel structure system, with all components prefabricated in the factory, complying with ISO 9001 and Tanzanian regulations (including TFDA food specifications).
Core Specifications Detailed:
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Dimensions and layout: 120 meters long, 70 meters wide, 12 meters high (wave height), total area 8400 square meters. Column-free wave space, facilitating species zoning and vessel unloading paths.
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Structural Components:
- Frame: Q355B marine-grade steel beams, load capacity 52 kN/m², adapting to seafood wet loads and salt fog resistance.
- Roof and cladding: 0.9mm galvanized thermal barrier panels, R-value 5.5, resisting tidal surge humidity fluctuations (26°C in winter to 38°C in summer).
- Foundation: Wave-resistant earthquake-proof anchor base system, suitable for coastal deployment, facilitating tidal water drainage and reuse.
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Custom Functions:
- Direct berthing area: Supporting 35-ton fishing vessels and ice-free forklift operations.
- Built-in ammonia-based evaporation and odor scrubbing: Maintaining seafood quality.
- 500 square meters control layer: For capture tracking and quality audits.
Implementation Process
Xinguangzheng sails with fishery sustainability in mind, advancing each phase to avoid storms. The plant was advanced in three phases, with a total duration of 5-6 months. We prefabricated components in specialized tidal simulation workshops in China, ensuring marine supervision, then shipped them by sea to the Tanzania site for assembly. This supply chain not only addresses waves but also ensures component stability during tropical transportation.
- Prefabrication phase (1-2 months): Fine parts production in Chinese factories, reducing corrosion losses by 50% through strict inspection mechanisms. Each component underwent simulated humid environment testing.
- Site preparation (15 days): For the coast, wave-proof foundation solidification and anchor base engineering. Immediate installation after containers docked.
- Assembly and testing (2-3 months): Swift bolting installation, no welding interference. After deploying the evaporation system, monsoon simulated freezing.
For tidal surge salt erosion, we adopted galvanized protective layers. Additionally, it is recommended to reserve 16% of the fishery project budget for wave energy optimization to prevent later sea repairs.
Results
After the plant set sail in March 2025, according to fishery monitoring and export indicators, the steel structure building demonstrated the following advantages:
- Freshness locking: Flash freezing tunnels achieve -40°C rapid cooling, significantly reducing bacterial growth by 45%, initial reports show seafood shelf life extended by 25-30%, supporting high-end Asian market supplies.
- Protection resilience: During Tanzania’s monsoon period, the plant withstood wave impacts with zero damage, thanks to earthquake-resistant anchor bases and thermal barrier layers, ensuring long-term marine stability of over 50 years.
- Capacity optimization: Large-span design improves packaging efficiency by 40%, data shows increased global shipment volumes, supporting sustainable fishery expansion.
Xinguangzheng offers professional seafood freezing plant construction options. For customized industrial refrigerated warehouse, please contact our team.
Aisha Mkwizu, Fishery Supervisor: Xinguangzheng’s freezing plant has truly elevated our seafood processing level. Its salt-proof structure maintained the original flavor of the catches, and the 6-month construction process seamlessly aligned with fishing season peaks. Output increased by 50%!
