Liquid Dewar Cylinders
Liquid Dewar Cylinders are pressurized containers designed to store and transport cryogenic liquids such as nitrogen, oxygen, argon, and carbon dioxide (CO2).
They are used to maintain frigid temperatures for cryogenic storage of liquid gases.
These liquid cylinders are mainly designed for the reliable and economical transportation and storage of liquefied gases at cryogenic temperatures, typically colder than –130°F (–90°C).
Liquid Dewar also includes liquid CO2 dewar, LN2 dewar, LAR dewar, and Helium liquid cylinder.
Benefits of liquid dewar cylinder
High thermal insulation: The walls of a CO2 Dewar are constructed from two or more layers, with a high vacuum maintained between the layers. It helps to maintain the low temperature of the cryogenic material.
Safe storage: LN2 Dewar cylinders are designed to be safe and easy to use once you understand the basics.
Durability: Dewar cylinders are made of high-quality materials that are resistant to corrosion and other forms of damage.
Portability: liquid cylinders come in various sizes for various applications, making them easily transported.
Cost-effectiveness: Dewar cylinders are cost-effective for storing and transporting cryogenic materials.
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The Inspection guarantee of dewar cylinders:
The relevant welding seams will be subject to 100% RT non-destructive testing and penetrant testing (PT) according to the technological requirements of storage tank production.
High-purity nitrogen (up to 99.999%) will be used for strength testing.
Finally, advanced helium mass spectrometer leak detectors (with precision up to 2×10-9Pa.L/s) will be used to conduct Helium mass spectrometer leak detection.
The inner containers of the storage tanks will be passivated by overall pickling to meet the cleanliness requirements for dangerous goods.
Imported ultraviolet black light lamps will be used to ensureare no oil stains and other organic impurities in the inner containers.
After cleaning, the inner and outer containers will be assembled in less than 2.5 hours.
After assembling, the inner containers and interlayers will be filled with nitrogen to protect them from dust and organic impurities and ensure cleanliness.
The inner and outer surfaces of the outer containers will be subject to overall sandblasting treatment to meet the requirements of the Sa-2.5 standard.
When the surfaces of steel plates show a metallic colour, a vacuum cleaner will be used to suck off the dust adhered to the surface to ensure the vacuum degree in the interlayer further.
Special high-quality perlite is used as the insulation material in the interlayer.
The perlite will be treated using our company’s unique process before being in the interlayer.
All the internal cylinders, after being manufactured, will be subject to gas-tight and pressure performance tests.
The internal and outer cylinders will be subject to rigorous Helium mass spectrum leak detection.
After the production is completed, all the pipe openings will be opened to carry out nitrogen purging and replacement to meet the oxygen usage standard.
After this, all the pipelines and valves will be sealed, and the tanks will be filled with 0.2MPa high-purity nitrogen to protect them.
