Oxygen Vacuum Storage Tank

• Function: Storage Cryogenic Liquid
• Type: Vertical or Horizontal
• Storage Medium: LOX/Liquid Oxygen

1. The design, manufacturing and inspection of vacuum storage tank mainly according to GB/T18442.1~6-2019 "Static vacuum insulated cryogenic pressure vessel", and can also follow international standards such as ASME. 
2. The inner vessel is used to store liquid oxygen, and the shell material is austenitic stainless steel, which has good low temperature resistance. The outer shell plays a protective role and provides reliable protection for the interlayer insulation material and vacuum degree. 
3. The interlayer is insulated by vacuum powder, and the insulation material is made of perlite, which greatly reduces heat intrusion, reduces the evaporation rate of cryogenic liquid, and ensures long-term storage. 
4. The storage tank is equipped with stainless steel cryogenic globe valve, combined vacuum valve (including vacuum gauge to measure the vacuum degree of the insulation layer at any time), safety valve, relief device, pressure gauge, liquid level gauge and other valve instruments; 
5. In order to meet the pressurization requirements of the storage tank, a pressure build-up vaporizer is equipped at the bottom of the tank.
6. The inner vessel is equipped with two sets of independent over-pressure relief devices to effectively ensure the safety of the tank. In addition, the safety explosion-proof devices installed on the outer vessel further ensure the safety and reliability of the entire equipment. 
7. For the inner vessel of the storage tank, 100% Radiographic Testing (RT) is first performed on Category A and Category B welded joints. This is followed by 100% Penetrant Testing (PT) on all welded joints. After ensuring that the non-destructive testing results are qualified, a pneumatic test is conducted on the inner vessel. Finally, each weld and joint is subjected to a leak test using a helium mass spectrometer leak detector. 
8. The finished paint film on the outer surface of the storage tank is dense, firm and reliable, and the dry film thickness of the paint is greater than 200 µm. 
9. The tank needs to be replaced with nitrogen before leaving the factory. Fill the interior of the liquid container with 0.03~ 0.05Mpa pressure nitrogen gas for protection. 
10. The liquid oxygen vacuum storage tank is easy to install and has low maintenance costs. It is widely used: in industry, it provides a stable oxygen source for oxidation and combustion processes in steel, chemical and other industries; in the medical field, it guarantees the supply of medical oxygen to hospitals, emergency centers, etc. 

Application

Metal Smelting

Provides high-purity oxygen support for steelmaking and metal processing, replacing traditional cylinder transportation to reduce costs and improve gas supply efficiency.

Gas Production & Supply

Enables centralized storage of liquid oxygen (LOX), liquid nitrogen (LIN), liquid argon (LAR), and carbon dioxide (CO₂) to meet large-scale gas supply demands in the gas industry.

Welding & Cutting

Delivers stable gas supply for welding applications, offering more economical and safer solutions compared to high-pressure cylinders.

Hospital Oxygen Systems

Provides centralized liquid oxygen storage to ensure continuous and stable oxygen supply for operating rooms, ICUs, and other critical care units.

Biological Sample Preservation

Stores vaccines, cells, and other biological samples in cryogenic environments (requires specialized cryogenic technologies).

Petrochemical Processing

Supports gas storage for organic synthesis, reactor processes, and other petrochemical applications.

Cryogenic Engineering

Enables deep cryogenic treatment of metal materials to enhance material properties (e.g., hardness, wear resistance).

Defense & Aerospace

Provides storage and supply of rocket propellants for space launch systems.

Suzhou Doer Gas & Chemical Equipment Co.,Ltd. is a high-tech enterprise, whose businesscovers R&D, design, manufacture, installation, complete engineering and industrial servicesof cryogenic equipment. Doer's total factoryarea is 135,000㎡ and the company has morethan 600 employees, including over 90 designand research & development professionals. Dedicated to becoming a leader in the field ofcryogenic liquid storage and transportation, DOER strives to provide clients with one-stopprofessional services.

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