Compact Cryogenic Storage for Liquid Nitrogen
BluNet supplies microbulk nitrogen tanks and compact nitrogen storage solutions for the safe storage and reliable supply of microb ulk liquid nitrogen (LN₂) in industrial and laboratory environments. Designed for reliability, efficiency, and safety, these systems allow facilities to store cryogenic nitrogen on-site while maintaining a stable and continuous nitrogen supply.
A microbulk nitrogen tank is essentially a miniaturized bulk storage system. Compared with conventional large cryogenic tanks, a mini nitrogen tank requires less installation space, reduces operating costs, and simplifies gas management while still delivering high-purity nitrogen in both liquid and gaseous forms.
BluNet microbulk nitrogen systems are widely used in applications such as laser cutting, metal fabrication, laboratory storage, food freezing, and industrial inerting processes where a reliable nitrogen supply is essential.
Key Advantages of Compact LIN Storage
- Continuous nitrogen supply – Stores liquid nitrogen (LN₂) on-site to provide a stable and uninterrupted nitrogen gas source.
- Lower operating costs – Liquid nitrogen storage reduces cylinder handling, logistics, and gas supply expenses.
- Improved safety – Minimises manual handling of high-pressure nitrogen cylinders and improves workplace safety.
- Compact installation – Microbulk LN₂ tanks require significantly less space than large bulk cryogenic storage systems.
- High storage efficiency – Because LN₂ expands rapidly when vaporised, a small tank can supply a large volume of nitrogen gas.
- On-site refilling – Microbulk tanks can be refilled directly by cryogenic delivery trucks, ensuring continuous nitrogen availability.
For manufacturing plants, laboratories, and research facilities, microbulk nitrogen tanks provide a practical and efficient alternative to traditional nitrogen cylinder supply systems.
Technical Specification – 3M³ Microbulk Nitrogen
| Model: CDLS-3/3.4
Insulation Type: Multi-Layer Vacuum Insulation |
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| No. | Parameter | Inner Vessel | Outer Vessel |
| 1 | Design Pressure (MPa) | 3.5 | -0.1 (External) |
| 2 | Working Pressure (MPa) | 3.4 | -0.1 (External) |
| 3 | Maximum Allowable Working Pressure – MAWP (MPa) | 3.5 | / |
| 4 | Design Temperature (°C) | -196 | -19 ~ 50 |
| 5 | Operating Temperature (°C) | ≥ -196 | Ambient |
| 6 | Hydrostatic Test Pressure (MPa) | 5.4 | HLD |
| 7 | Gross Volume (m³) | 3.18 | 1.83 (Interlayer Space) |
| 8 | Effective Volume (m³) | 3 | / |
| 9 | Stored Medium | Liquid Nitrogen (LIN) | Multi-Layer Insulation |
| 10 | Material | S30408 Stainless Steel | S30408 Stainless Steel |
| 11 | Surface Treatment | Pickling and Passivation | Sandblasting (Sa2.5) and Protective Coating |
| 12 | Corrosion Allowance (mm) | 0 | 0 |
| 13 | Weld Joint Efficiency | 1 | 0.85 |
| 14 | Maximum Filling Rate | 95% | / |
| 15 | Static Evaporation Rate (% / day) | LN₂ ≤ 0.6 | |
| 16 | Vacuum Degree After Sealing (Pa) | ≤ 0.01 | |
| 17 | Interlayer Leakage Rate | ≤ 2 × 10⁻⁷ | |
| 18 | Diameter (mm) | Φ1400 | Φ1604 |
| 19 | Overall Dimensions (mm) | Φ1604 × 2945 | |
| 20 | Tank Orientation | Vertical | |
| 21 | Tare Weight (kg) | ~2146 | |
| 22 | Maximum Loaded Weight (kg) | Approx. 5000 (LIN) | |
| 23 | Design Service Life | 15 Years | |
| 24 | Safety Valve Set Pressure (MPa) | 3.45 | |
| 25 | Maximum Medium Density (kg/m³) | 808 (LIN) | |
| 26 | Coating Thickness (µm) | / | |
| 27 | Factory Pre-Pressurisation (MPa) | 0.03 | |
| 28 | Design Standard | GB Pressure Vessel Standard | |
Micro Bulk tanks for liquid gas
Cryogenic bulk tanks are used to store and transport different liquefied gases.
These Mini tanks typically consist of an inner and an outer tank of high-quality stainless steel with polyurethane foam insulation in between.
Micro Bulk Structure
A typical microbulk nitrogen tank consists of two primary pressure vessels:
- Inner vessel – A cryogenic stainless steel container that stores the liquid nitrogen.
- Outer vessel – A protective shell that supports the insulation system and maintains the vacuum jacket.
The space between these vessels is filled with high-vacuum multilayer insulation, which dramatically reduces heat transfer from the surrounding environment. This insulation system allows the stored liquid nitrogen to remain at cryogenic temperature while minimising evaporation loss.
Additional integrated components often include pressure-building coils, safety valves, level gauges, and vaporisation systems that regulate nitrogen delivery to downstream equipment.
Applications of Microbulk Nitrogen
Microbulk nitrogen tanks are widely used in industries that require a reliable and continuous supply of nitrogen gas.
- Laser cutting and metal fabrication
- Precision welding and heat treatment
- Electronics and semiconductor manufacturing
- Laboratories and cryogenic research facilities
- Medical oxygen and laboratory nitrogen supply
- Food processing and cryogenic freezing
- Inert gas purging and chemical blanketing
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