Liquid Nitrogen Dewar Supplier in China
DSW provides high-quality cryogenic tanks, dewars, cryogenic vessels, and liquid nitrogen containers for research, medical, biotechnology, instrumentation, superconductivity semiconductors, home care, and food service industries.
What is Nitrogen Dewar?
Liquid Nitrogen Dewar is designed to store small quantities of liquid nitrogen.
Liquid nitrogen is classified as a cryogen, meaning its boiling point is shallow and must be carefully handled.
The high-strength aluminum shell is both durable and lightweight. Super insulation provides advanced thermal protection.
The cryogenic liquid generally found in liquid nitrogen dewar is liquid nitrogen (LIN), liquid argon (LAR), liquid oxygen (LOX), and liquid helium (LHE).
Carbon dioxide and nitrous oxide are also available as refrigerated liquids in similar containers.
nitrogen dewar sizes
Dewar Vessels
Dewar vessels are unique vacuum flasks explicitly designed for transporting and storing liquid nitrogen, argon, and oxygen. Dewars are commonly referred to as cryogenic Dewar flasks or liquid nitrogen flasks.
What Is Nitrogen?
Nitrogen (N2) is a versatile gas used across numerous applications and industries. We’re always ready to supply it as new applications arise – offering multiple purities and delivery modes for maximum flexibility.
How are cryogenic dewar flasks/containers used?
Cryogenic dewars store, dispense or transport cryogenic gases like liquid nitrogen, liquid oxygen, liquid helium, and liquid hydrogen.
A researcher might use a dewar to dispense liquid nitrogen or helium for an experiment.
There are dewars made specifically for studying superconductivity.
Dewar containers store embryos for fertility treatments.
Truck-mounted dewars with specialized hoses deliver oxygen for in-home use.
Portable dewars with casters and handles dispense cryogenic liquids across a factory or lab.
Inspection guarantee of Liquid Nitrogen Dewar:
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 ensure 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 to 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 color, a vacuum cleaner will 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 production, 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 the tanks.
