Shandong Zhongjie Special Equipment (formerly Heze Boiler Factory Co., Ltd.) holds an A-grade boiler manufacturing license, an A2-grade pressure vessel manufacturing license, an A2-grade pressure vessel design license, a B-grade boiler installation license, and GB2/Class GC2 pressure pipeline installation licenses, as well as equipment and machinery installation contracting qualifications. It is a member of the China Boiler and Water Treatment Association, the China Chemical Equipment Association, and a council member of the Shandong Equipment Manufacturing Association. The company has also passed certifications for the ISO9001 Quality Management System, ISO14001 Environmental Management System, OHSAS18001 Occupational Health and Safety Management System, and the U.S. ASME/U2 certification.
Leakage issues in liquid argon storage tanks may be caused by the following reasons:
Design or Manufacturing Defects: Defects in the design or manufacturing process of the tank, such as poor welding, improper material selection, or loose seals, may lead to leakage issues.
Corrosion and Oxidation: Long-term exposure to low temperatures can cause corrosion and oxidation in liquid argon tanks. These issues can damage the tank's surface protective layer, leading to leakage problems.
Fatigue and stress cracking: During long-term use, tanks may experience fatigue and stress cracking due to temperature and pressure fluctuations. These cracks can degrade the tank's sealing performance, leading to leaks.
Improper Operation: Failure to follow proper procedures during the storage tank's operation, such as overfilling with liquid argon or excessive pressure, can lead to tank damage and leakage.
External Damage: The tank may sustain damage from external factors such as mechanical impacts or objects.

Nitrogen charging of liquid nitrogen tanks refers to the process of injecting nitrogen gas into the tank to increase the nitrogen concentration and pressure inside, in order to meet certain safety requirements and operational objectives. Here are some precautions to consider when nitrogen charging liquid nitrogen tanks:
Safety Operation: Prior to conducting nitrogen purge operations on liquid nitrogen tanks, it is essential that operators possess relevant safety knowledge and operational skills. Operators must wear appropriate personal protective equipment, such as safety goggles, gloves, and protective clothing.
Nitrogen Quality: Utilize high-purity nitrogen for inerting operations to ensure the quality and purity of nitrogen. Low-purity nitrogen may contain impurities or oxygen, which could adversely affect the liquid nitrogen within the storage tank.
Nitrogen Flush Rate Control: During the nitrogen flushing process, the flush rate should be controlled to avoid being too fast or too slow. Excessive nitrogen flush rates can lead to elevated internal pressures within the tank, while too slow of a rate can result in extended flushing times.
Pressure Monitoring: During the nitrogen filling process, the internal pressure of the tank should be monitored regularly. Ensure the internal pressure of the tank is within a safe range and adjust as necessary.
Temperature Control: During the nitrogen flushing process, attention should be given to controlling the temperature of the storage tank. The low temperature of liquid nitrogen can lead to condensation and dew formation on the tank and pipelines. Appropriate measures, such as heating or insulation, should be taken to prevent condensation and dew formation.
Post-nitrogen flushing treatment: After the nitrogen flushing operation is completed, the flushing device should be promptly turned off, and the tank should be inspected and cleaned. Ensure there is no residual nitrogen or impurities inside the tank.
Note: Nitrogen charging operations for liquid nitrogen tanks must strictly adhere to relevant safety standards.

Prior to cooling the liquid oxygen tank, the following prerequisites must be met:
Clean Vessels: Ensure the interior of the tank is clean, free of impurities and contaminants. The tank should be properly cleaned and flushed to maintain its cleanliness.
Drainage and Exhaust: Empty the gas from the tank and expel it through the exhaust system to reduce the gas content within the tank. This helps minimize interference of the gas on the cooling process.
Safety Precautions: Necessary safety measures must be taken prior to cooling the liquid oxygen tank. Liquid oxygen is highly flammable and exhibits low-temperature properties. Operators should wear appropriate protective suits, gloves, and other personal protective equipment to ensure safe operation.
Temperature Control: During the cooling process of the liquid oxygen tank, it is necessary to control the temperature of the tank. Typically, low-temperature media such as liquid nitrogen are used to cool the tank, ensuring that the tank's temperature gradually decreases below the boiling point of liquid oxygen.
Insulation and Heat Retention: Liquid oxygen tanks commonly employ double or multi-layer construction, filled with insulating material in between to minimize heat transfer and evaporation of the liquid oxygen. Ensuring the integrity and excellent insulation of the insulation layer enhances the cooling efficiency of the tank.
Under the aforementioned preconditions, the cooling operation of the liquid oxygen tank may be conducted. The cooling process must strictly adhere to relevant safety regulations and operational guidelines to ensure the safe operation and use of the tank.

Liquid argon storage tanks are equipment used for storing and transporting liquid argon, with the following scope and characteristics:
Application Range:
Industrial Applications: Liquid Argon Storage Tanks are widely used in various industrial sectors such as metal processing, electronic manufacturing, semiconductor production, and more.
Applications: Liquid argon storage tanks are used in the field for cryogenic preservation of biological samples, cells, tissues, and vaccines.
Laboratory Applications: Liquid argon tanks are used in scientific research laboratories for low-temperature experiments, cryopreservation, and sample processing, etc.
Features:
Low-temperature performance: As the boiling point of liquid argon is -185.7°C, the liquid argon storage tank must have excellent low-temperature insulation properties to maintain its低温 state.
High sealing performance: Liquid argon storage tanks must have excellent sealing capabilities to prevent evaporation loss of liquid argon and the entry of external air.
Safety: Liquid argon is a flammable and explosive substance; therefore, liquid argon tanks must be equipped with safety valves, leak detectors, and other safety devices to ensure safe operation.
Large Capacity: The capacity of liquid argon storage tanks ranges from a few liters to several thousand liters, allowing for the selection of an appropriate size based on requirements.
Cautionary Notes:
Protective Gear: When operating liquid argon tanks, it is mandatory to wear appropriate protective gear, including gloves, protective clothing, and non-slip shoes, to safeguard against the low temperatures of liquid argon and other hazards.
Ventilation Requirements: At
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