BluNet specializes in cryogenic dewar manufacturing, providing custom vacuum insulated dewars and cryogenic storage vessels for industrial gas, medical, laboratory, and research applications.
With extensive experience in cryogenic equipment manufacturing, we design and produce reliable cryogenic dewars for storing liquefied gases including liquid nitrogen (LN₂), liquid oxygen (LOX), liquid argon (LAr), and other cryogenic fluids.
Our cryogenic storage dewars are manufactured using stainless steel construction, vacuum insulation technology, and strict quality control procedures to achieve excellent thermal performance, low evaporation rates, and safe long-term operation.
Custom Cryogenic Dewar Manufacturing Capabilities
As an experienced cryogenic dewar manufacturer, BluNet provides complete engineering and manufacturing services from product design to final inspection.
Our custom cryogenic dewar solutions can be designed according to customer requirements, including storage capacity, working pressure, gas type, connection configuration, and application environment.
- Custom cryogenic dewar design and engineering
- Stainless steel cryogenic vessel fabrication
- Vacuum insulated structure manufacturing
- Cryogenic piping and valve integration
- Pressure testing and vacuum performance inspection
- OEM and customized manufacturing services
Vacuum Insulated Dewar Design and Construction
A cryogenic dewar is a vacuum insulated storage vessel designed to maintain extremely low temperatures for liquefied gases. The insulation system is the key factor affecting storage efficiency and evaporation performance.
BluNet cryogenic dewars use a double-wall structure consisting of an inner vessel and outer jacket. The vacuum space between the two layers minimizes heat transfer, while multi-layer insulation (MLI) further improves thermal protection.
| Component | Function |
|---|---|
| Inner Vessel | Stores cryogenic liquid safely under designed pressure and temperature conditions. |
| Outer Jacket | Provides mechanical protection and creates the vacuum insulation space around the inner vessel. |
| Vacuum Layer | Minimizes heat transfer between the inner vessel and external environment, reducing evaporation losses. |
| Multi-Layer Insulation (MLI) | Improves thermal insulation performance and enhances long-term cryogenic storage efficiency. |
| Cryogenic Valves and Piping | Controls filling, liquid withdrawal, pressure regulation, and safe operation of the cryogenic system. |
Cryogenic Dewar Manufacturing Process
BluNet follows strict manufacturing procedures to ensure every cryogenic storage dewar delivers reliable performance in demanding cryogenic environments.
1. Material Selection
Cryogenic vessels require materials that maintain mechanical strength and corrosion resistance at extremely low temperatures.
- Stainless steel 304 / 304L
- Stainless steel 316 / 316L
- Cryogenic-rated valves and components
- High-performance insulation materials
2. Vessel Fabrication and Welding
The inner vessel and outer jacket are manufactured through precision forming and welding processes. Welding quality is carefully controlled to ensure structural reliability and long service life.
3. Vacuum Insulation Processing
The vacuum insulation system is assembled through professional vacuum evacuation procedures. Leak testing and vacuum performance testing ensure stable thermal insulation performance.
4. Testing and Inspection
Before shipment, each cryogenic dewar undergoes comprehensive quality inspection, including:
- Pressure testing
- Vacuum testing
- Helium leak testing
- Valve and piping inspection
- Final appearance inspection
Types of Cryogenic Dewars We Manufacture
BluNet manufactures different types of cryogenic storage dewars for various industrial and scientific applications.
| Dewar Type | Typical Applications |
|---|---|
| Liquid Nitrogen Dewar | Laboratories, biological storage, medical applications, and industrial processes |
| Liquid Oxygen Dewar | Medical oxygen supply systems and healthcare facilities |
| Liquid Argon Dewar | Welding, metal processing, and industrial gas supply applications |
| Laboratory Cryogenic Dewar | Research institutes, universities, and scientific applications |
| Custom Cryogenic Storage Dewar | Special industrial requirements and OEM cryogenic projects |
Cryogenic Dewar Technical Specifications
| Parameter | Description |
|---|---|
| Storage Medium | Liquid nitrogen (LN₂), liquid oxygen (LOX), liquid argon (LAr), and other cryogenic fluids |
| Material | Stainless steel 304 / 316 for reliable low-temperature performance |
| Insulation Type | Vacuum insulation combined with multi-layer insulation (MLI) |
| Operating Temperature | Designed for cryogenic temperatures below -150°C |
| Capacity | Customized according to storage requirements and application conditions |
| Design Pressure | Customized according to customer specifications and operating requirements |
Applications
Cryogenic storage dewars are widely used in industries requiring safe and efficient storage of liquefied gases.
- Medical and Healthcare: oxygen supply systems, biological sample preservation, and medical research.
- Industrial Gas: nitrogen, oxygen, and argon storage for manufacturing processes.
- Laboratory and Research: low-temperature experiments and scientific applications.
- Food Processing: cryogenic cooling and freezing applications.
- Electronics and Advanced Manufacturing: controlled atmosphere and specialty gas applications.
Why Choose BluNet?
- Professional Manufacturing Experience: Experience in cryogenic equipment fabrication and industrial gas solutions.
- Customized Engineering: Dewars designed according to customer specifications and operating requirements.
- Reliable Vacuum Technology: Vacuum insulated structures designed for reduced heat transfer and lower boil-off rates.
- Strict Quality Control: Complete inspection procedures before delivery.
- Complete Cryogenic Solutions: Supply of cryogenic tanks, ISO tanks, vaporizers, pumps, and gas supply systems.
Cryogenic Dewar vs Cryogenic Storage Tank
| Feature | Cryogenic Dewar | Cryogenic Storage Tank |
|---|---|---|
| Main Purpose | Flexible cryogenic liquid storage | Large-volume industrial cryogenic storage |
| Capacity | Small to medium storage capacity | Medium to large storage capacity |
| Mobility | Often portable and suitable for flexible use | Usually fixed installation for continuous gas supply |
| Applications | Laboratory, medical, research, and industrial applications | Bulk gas storage, distribution systems, and industrial facilities |
International Standards & Certifications
Cryogenic storage dewars are pressure vessels designed to store liquefied gases at extremely low temperatures. To ensure safety, reliability, and international market compliance, BluNet manufactures cryogenic dewars according to recognized pressure vessel standards and customer certification requirements.
Our quality control system covers material selection, vessel fabrication, vacuum insulation processing, pressure testing, and final inspection to ensure each cryogenic dewar meets strict performance and safety requirements.
| Standard | Purpose |
|---|---|
| ASME Section VIII | Pressure vessel design, fabrication, inspection, and testing requirements for cryogenic vessels. |
| PED 2014/68/EU | European pressure equipment requirements for safe operation and market access within the EU. |
| EN 13458 | Requirements for static vacuum insulated cryogenic vessels used for storing liquefied gases. |
| ISO 21009 | International requirements for static vacuum insulated cryogenic vessels. |
| GB Standards | Chinese standards covering cryogenic vessel design, manufacturing, and inspection. |
Compliance with these international standards demonstrates that CNG cylinders have successfully passed comprehensive mechanical testing, pressure testing, fatigue evaluation, environmental assessment, and quality inspections, ensuring reliable performance throughout their service life.
Get Your Custom Cryogenic Dewar Solution!
Whether you need BluNet provides custom vacuum insulated cryogenic dewars for industrial gas, medical, laboratory, and research applications. Contact us to discuss your storage capacity, gas type, and technical requirements.
How to Select the Right Cryogenic Dewar
Selecting the appropriate cryogenic dewar depends on the stored cryogenic liquid, required storage capacity, operating conditions, application environment, and safety requirements. Choosing the correct dewar design helps ensure reliable cryogenic storage, lower evaporation losses, and long-term operational performance.
Key Selection Factors
- Stored medium (liquid nitrogen, liquid oxygen, liquid argon, or other cryogenic fluids)
- Required storage capacity and liquid holding time
- Working pressure and operating temperature requirements
- Vacuum insulation performance and expected boil-off rate
- Application type (laboratory, medical, industrial, or research use)
- Mobility requirements (portable dewar or fixed installation)
- Material selection and cryogenic compatibility (stainless steel 304/316)
- Valve, piping, and connection configuration requirements
- Applicable pressure vessel standards and certification requirements
- Environmental conditions and frequency of operation
Our engineering team can recommend the most suitable cryogenic dewar configuration based on your gas type, storage requirements, operating conditions, and project specifications. We provide customized vacuum insulated dewar solutions for industrial, medical, laboratory, and specialty cryogenic applications.
TECHNICAL FAQs
About Cryogenic Dewar Manufacturing
Cryogenic dewars are commonly used to store liquid nitrogen (LN₂), liquid oxygen (LOX), liquid argon (LAr), and other cryogenic fluids for industrial, medical, and laboratory applications.
A vacuum insulated cryogenic dewar uses a double-wall structure with a vacuum layer and insulation materials to reduce heat transfer and minimize cryogenic liquid loss.
Cryogenic dewars are usually made from stainless steel 304 or 316, which provides good strength, corrosion resistance, and reliable performance at extremely low temperatures.
Yes. BluNet manufactures customized cryogenic dewars according to customer requirements, including capacity, pressure rating, gas type, connections, and application conditions.
Cryogenic storage dewars can be manufactured according to international standards such as ASME Section VIII, PED, EN 13458, ISO 21009, and other applicable pressure vessel standards.
Before shipment, cryogenic dewars are tested through material inspection, welding inspection, pressure testing, vacuum testing, leak testing, and final quality checks.
A cryogenic dewar is mainly used for smaller and flexible storage needs, while a cryogenic storage tank is designed for larger-volume industrial gas storage and supply systems.
The right cryogenic dewar depends on the stored fluid, required capacity, working pressure, insulation performance, application, and operating environment.
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