Shandong Zhongjie Special Equipment (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-freeze containers, pressure vessels, central air conditioning, engineering installation, international trade, and Internet of Things. It has three factory sites on Jinnan Road, East Changjiang Road, and Bohai Road, covering a total area of 200,000 square meters, with the main workshop spanning 83,000 square meters. It currently employs 710 people, including 247 engineers and technicians and 82 intermediate-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 Department of Industry and Information Technology. In June 2022, it was recognized as a "Gazelle Enterprise in Shandong Province" and in August 2022, as a "Specialized and New Small Giant Enterprise" by the Ministry of Industry and Information Technology.
Low-temperature liquid oxygen storage tanks typically require certain safety accessories to ensure safe operation and to address potential risks. The following are some common safety accessories for low-temperature liquid oxygen storage tanks:
Pressure Sensor: Used to monitor pressure changes inside storage tanks. Upon exceeding the set range, it will trigger alarms or automatically stop filling measures to prevent overpressure in the tank.
Safety Valve: Used to automatically release gas when the pressure inside the storage tank exceeds the set value, preventing overpressure. The safety valve should be selected and installed based on the design pressure and capacity of the storage tank.
Pressure Relief Device: Used to release gas to a safe area when the pressure inside the storage tank is too high, in order to alleviate the pressure on the tank. The pressure relief device usually includes pressure relief valves, relief pipes, etc.
Level sensor: Used to monitor the level change of liquid oxygen inside storage tanks, ensuring an adequate supply of liquid oxygen and preventing overfilling.
Temperature Sensor: Used to monitor temperature changes within storage tanks to ensure the temperature of liquid oxygen inside remains within a safe range.
Fire Detectors and Fire Suppression Systems: Designed to monitor fire risks around storage tanks and activate fire suppression systems as needed to prevent the spread of fire to adjacent areas.

A hydrostatic test of a liquid nitrogen storage tank is a common method used to check the tank's sealing and pressure resistance. Below are the general steps for the hydrostatic testing of a liquid nitrogen storage tank:
Preparation: Ensure the tank interior is clean and that the tank is empty of any gases or liquids. Check the tank's seal integrity and that the safety devices are functioning properly.
Fill Water: Fill the internal tank with water, ensuring the water level is above the low water mark. Use a pump or other appropriate methods for filling.
Apply Pressure: Gradually increase the water pressure using a pressure pump or other pressure source until the predetermined test pressure is reached. The test pressure is typically 1.1 times the design working pressure of the tank.
Pressure Maintenance: After reaching the test pressure, maintain it for a period (typically 30 minutes to 1 hour) and observe for any abnormal conditions such as leaks or deformation in the tank.
Pressure Relief: Gradually release pressure to drain water from the tank until the tank is completely empty.
Inspection and Evaluation: Check for leaks, deformations, or other damage on the surface and interior of the tank. Evaluate the test results to ensure the tank meets design requirements and safety standards.
需要注意的是，液氮储罐水压试验需要由人员进行操作，并遵循相关的安全操作规程。在进行测试前，应仔细阅读和遵守储罐制造商提供的操作指南和安全注意事项。

Liquid Argon Storage Tanks are specialized equipment designed for storing liquid argon, featuring the following parameters, functions, and characteristics:
Parameters:
Tank Capacity: The capacity of liquid argon tanks can be customized to meet requirements, typically available in various sizes such as 500L, 1000L, 2000L, and so on.
Work Pressure: The working pressure of liquid argon tanks is typically at atmospheric pressure or slightly above atmospheric pressure.
Storage Temperature: Liquid argon storage tanks are typically kept at -196 degrees Celsius, which is the boiling point of argon, maintaining its liquid state.
Function:
Liquid Argon Storage: Liquid Argon Tanks are primarily used for storing liquid argon, maintaining its liquid state at low temperatures for supply and use.
Insulation: The liquid argon storage tank employs insulation materials and structural design to minimize heat conduction and retention, maintaining the low temperature state of the liquid argon.
Safety Control: The liquid argon tank is equipped with safety devices such as pressure relief valves and level alarms to ensure safe operation and use.
Features:
High Purity Supply: Liquid Argon tanks provide high purity liquid argon for applications such as cryogenic storage, gas shielded welding, and semiconductor manufacturing.
Long-term Storage: Liquid argon tanks are designed for long-term storage of liquid argon, extending their service life. By controlling the tank's internal temperature and the performance of the insulation layer, the evaporation and oxidation of the liquid argon are slowed down.
Wide Range of Applications: Liquid argon storage tanks are widely used in various fields such as industry, scientific research, and applications like refrigeration, semiconductor manufacturing, etc.
Eco-friendly Energy-saving: Liquid argon tanks effectively store and utilize liquid argon, reducing energy waste and environmental pollution.
In summary, liquid argon storage tanks are designed for storing liquid argon, thermal insulation, and safety.

The use of liquid nitrogen storage tanks in rapid freezing technology offers several advantages:
Rapid Freezing Speed: Liquid nitrogen has a low temperature of approximately -196 degrees Celsius. Utilizing liquid nitrogen tanks for quick freezing can rapidly lower the surface temperature of food, achieving fast freezing. Compared to traditional freezing methods, liquid nitrogen freezing can significantly reduce freezing time while preserving the quality and texture of the food.
Uniformly Frozen Effect: The liquid nitrogen quick-freezing technique achieves rapid and even freezing of food. Liquid nitrogen is喷射ed onto the food surface in a gaseous form, quickly absorbing heat and transforming into a liquid, thereby ensuring uniform freezing of the food and preventing crystallization and lumping during the freezing process.
Maintain Food Quality: Liquid nitrogen rapid freezing quickly chills food, reducing crystallization and clumping during the freezing process, thereby preserving the quality and texture of the food. During the rapid freezing process, liquid nitrogen rapidly lowers the surface temperature of the food, forming minute frozen structures, effectively retaining the food's moisture and nutritional content.
Flexibility and Adaptability: Liquid nitrogen tanks can be adjusted and controlled according to different types of food and freezing requirements. The injection speed and angle of liquid nitrogen can be adjusted based on the size, shape, and freezing needs of the food to achieve optimal freezing effects.
Environmental Protection and Energy Efficiency: Liquid nitrogen rapid freezing technology is more energy and resource-efficient compared to traditional freezing methods. Liquid nitrogen evaporates quickly during the freezing process, causing environmental pollution and generating waste water and gas.
Note that when using liquid nitrogen storage tanks for rapid freezing, it is crucial to follow the relevant safety operation procedures and guidelines. Ensure that operators are equipped with the necessary safety awareness and operational skills to prevent any accidental incidents. In addition, consult
Shandong Zhongjie Special Equipment, welcome customers to visit our factory for cooperation negotiations.