Shandong Zhongjie Special Equipment Co., Ltd. (formerly Heze Boiler Factory Co., Ltd.) was established in 2001, located at No. 2218 Jinnan Road, Development Zone, Heze City, with a registered capital of 50 million yuan and total assets of 500 million yuan. The company has 7 business centers: boilers, deep-freezing vessels, pressure vessels, central air conditioning, engineering installation, international trade, and the Internet of Things. It has three factory sites on Jinnan Road, East Changjiang Road, and Bohai Road, covering a total of 200,000 square meters, with the main workshop spanning 83,000 square meters. It currently employs 710 people, including 247 engineering and technical personnel and 82 middle-level technical personnel. In December 2016, it was recognized as a "High-tech Enterprise" by the Science and Technology Department. In June 2021, it was identified as a "Specialized and New Enterprise in Shandong Province" by the Ministry of Industry and Information Technology. In June 2022, it was recognized as a "Deer Enterprise in Shandong Province" by the Ministry of Industry and Information Technology, and in August 2022, it was identified as a "Specialized and New Small Giant Enterprise" by the Ministry of Industry and Information Technology.
Several factors need to be considered when determining the design pressure and calculated pressure of a liquid oxygen storage tank:
Design Pressure: Design pressure refers to the maximum pressure a tank can withstand under normal operating conditions. When determining the design pressure, factors such as the working pressure range of liquid oxygen, the material strength of the tank, and safety factors must be considered. Generally, the design pressure should be slightly higher than the high working pressure of liquid oxygen to ensure the tank's safety and reliability within the normal operating range.
Calculated Pressure: The calculated pressure refers to the actual working pressure of the tank under its design pressure. The calculated pressure is determined based on factors such as the properties of liquid oxygen, the geometric shape of the tank, and the material strength. The calculated pressure should consider factors like the expansion coefficient of liquid oxygen, temperature changes, and pressure fluctuations to ensure the safety and stability of the tank under actual operating conditions.
Determining the design pressure and calculated pressure for liquid oxygen storage tanks typically requires referencing relevant standards and specifications, such as Standard GB150 for "Steel Pressure Vessels" and GB18442 for "Technical Conditions for Storage Tanks of Liquid Oxygen, Liquid Nitrogen, and Liquid Argon." These standards and specifications provide detailed design and calculation methods to ensure the safety and reliability of the tanks.
In practical application, the design pressure and calculated pressure of liquid oxygen storage tanks should be calculated and determined by pressure vessel designers. They will take into account specific engineering requirements, tank dimensions, materials, and other factors to ensure the tank's design and use comply with relevant safety standards and regulations.

The normal pressure range for liquid oxygen tanks typically falls between 2-5 bar. This range refers to the oxygen pressure inside the tank, which is necessary to maintain the liquid state of the oxygen. The design and manufacture of liquid oxygen tanks should comply with relevant standards and specifications to ensure the tank can safely withstand this pressure range under normal operating conditions. It should be noted that the pressure of liquid oxygen tanks can be affected by various factors, such as the temperature of the liquid oxygen, the tank's design, and materials. In actual use, the normal pressure range of the tank should be determined based on specific tank design and usage requirements, and operations and maintenance should adhere to relevant regulations and standards. Additionally, liquid oxygen tanks should be equipped with pressure control devices, such as pressure valves or relief devices, to ensure the internal pressure of the tank remains within a safe range. These devices can automatically release gas when pressure exceeds the set value, ensuring the safety of the tank. Regular inspection and maintenance of these pressure control devices should be conducted when using liquid oxygen tanks to ensure their proper functioning.

Liquid oxygen stations are facilities used for storing and supplying liquid oxygen, and liquid oxygen tanks are an integral part of these stations. Liquid oxygen tanks possess several important functions and characteristics:
Store Liquid Oxygen: Liquid oxygen tanks are primarily used for storing liquid oxygen, cooling gaseous oxygen below its critical temperature to convert it into a liquid state. The storage density of liquid oxygen is high, allowing for the storage of large amounts of oxygen in a relatively small space.
Maintain Low Temperature: Liquid oxygen tanks typically feature a double-layered design, with a vacuum layer separating the inner and outer layers to minimize heat conduction and maintain low temperatures. This helps keep the liquid oxygen in a低温 state, preventing premature vaporization.
Safety Design: During the design and manufacturing process, liquid oxygen tanks must prioritize safety. They are typically made from high-strength materials such as stainless steel or aluminum alloy to withstand high pressure and low-temperature requirements. Additionally, liquid oxygen tanks are equipped with safety valves, pressure sensors, and temperature sensors to ensure the internal pressure and temperature of the tank remain within safe limits.
Supply System Connection: Liquid oxygen tanks are typically connected to the supply system to transport liquid oxygen to the required locations. The supply system includes liquid oxygen pumps, pipelines, valves, and other equipment for extracting liquid oxygen from the tank and delivering it to the user end.
Liquid oxygen tanks play a crucial role in storing and maintaining liquid oxygen in liquid oxygen stations. Their design and operation must strictly adhere to relevant safety regulations and procedures to ensure the safety and reliability of the storage and supply process.

The dimensions and structure of liquid oxygen storage tanks can vary depending on specific requirements and applications. The following are common sizes and structures of liquid oxygen storage tanks:
Dimensions: The size of liquid oxygen tanks is typically determined by the storage or transportation capacity of liquid oxygen. Common liquid oxygen tank capacities range from a few thousand to several tens of thousands of liters.
Structure: The structure of the liquid oxygen tank primarily includes the inner cylinder, outer shell, insulation layer, and supporting structure, etc.
Inner Shell: The inner shell of the liquid oxygen tank is the part designed for storing liquid oxygen, commonly made of materials like stainless steel or aluminum alloy, which offer excellent corrosion resistance and sealing properties.
Shell: The outer shell of the liquid oxygen tank is the external structure that protects the inner shell, typically made of carbon steel or stainless steel, and offers sufficient strength and corrosion resistance.
Insulation Layer: The insulation layer of the liquid oxygen storage tank is designed to minimize heat transfer and loss, maintaining the low temperature of the liquid oxygen. Common insulation materials include polyethylene foam, glass fiber, and aerogel, etc.
Support Structure: The support structure of the liquid oxygen tank is used to support and secure the inner shell and outer shell of the tank. The support structure is typically made of steel, offering sufficient strength and stability.
The dimensions and structural design of liquid oxygen tanks must consider the properties of liquid oxygen, storage or transportation requirements, safety standards, and other factors. When using liquid oxygen tanks, it is essential to strictly adhere to the relevant operational specifications and safety requirements to ensure safe use.
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