Shandong Zhongjie Special Equipment (formerly Heze Boiler Factory Co., Ltd.) was established in 2001, located at No. 2218 Jinan Road, Economic and Technological Development Zone, Heze City. With a registered capital of 50 million yuan and total assets of 500 million yuan, the company has seven business centers: boilers, deep-freeze containers, pressure vessels, central air conditioning, engineering installation, international trade, and Internet of Things. It has three manufacturing sites on Jinan Road, East Yangtze 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 staff, including 247 engineers and technicians, and 82 intermediate-level technicians. In December 2016, it was recognized as a "High-tech Enterprise" by the Science and Technology Department. In June 2021, it was named a "Specialized and New Enterprise of Shandong Province" by the Industry and Information Technology Department. In June 2022, it was recognized as a "Gazelle Enterprise of Shandong Province" and in August 2022, as a "Specialized and New Small Giant Enterprise" by the Ministry of Industry and Information Technology.
In the degreasing process of high vacuum pipelines in low-temperature liquid storage tanks, the following steps can be taken:
Preparation: Ensure the cleanliness and readiness of the defatting equipment and tools. Check the piping system's connections and seals to ensure there are no leaks.
Pipe Cleaning: Clean the pipes using suitable detergents and tools to remove surface dirt and grease. Methods can include mechanical brushing, high-pressure water washing, or chemical cleaning.
De-greasing Process: Select an appropriate de-greaser and inject it into the pipeline system. The de-greaser can be an organic solvent or an alkaline solution, the choice depending on the pipeline material and the type of dirt. Ensure the de-greaser thoroughly covers the inner pipeline walls and maintains a certain contact time.
Flush pipes: Drain the degreaser from the pipeline system and flush with clean water to remove any remaining degreaser and dirt. During the flushing process, high-pressure water or gas can be used for rinsing to ensure the cleanliness of the pipeline interior.
Drying Pipe: Utilize drying equipment or ventilation systems to evaporate or exhaust moisture within the pipe, ensuring the interior surface is dry. Drying can be achieved using hot air or nitrogen.
Inspection and Testing: After degreasing, inspect and test the pipeline to ensure cleanliness and sealing integrity. Visual inspection, pressure testing, or other relevant tests can be conducted.
Be mindful that when descaling high vacuum pipelines of low-temperature liquid storage tanks, adhere to the relevant safety operation procedures and guidelines. Ensure that operators possess the necessary safety awareness and operational skills to prevent accidents.

Leakage issues in liquid argon storage tanks may be caused by the following reasons:
Design or Manufacturing Defects: Deficiencies in the design or manufacturing process of the tank, such as loose welding, improper material selection, or inadequate sealing, lead to leakage issues in the tank.
Corrosion and Oxidation: Long-term exposure to low temperatures can cause corrosion and oxidation in liquid argon tanks. These can damage the tank's surface protective layer, leading to leakage issues.
Fatigue and stress cracking: During long-term use, tanks may experience fatigue and stress cracking due to temperature and pressure fluctuations. These cracks can reduce the tank's sealing performance, leading to leaks.
Improper Operation: Failure to operate the tank in accordance with specifications, such as overfilling with liquid argon or applying excessive pressure, can lead to tank damage and leakage.
External Damage: The tank may sustain damage from external factors such as mechanical collisions or objects.

Proper installation of the safety valve on liquid oxygen storage tanks is a crucial step to ensure safe operation. Here are the installation steps for the safety valve on liquid oxygen storage tanks:
Select the appropriate safety valve: Choose a safety valve that meets the design pressure and flow requirements of the liquid oxygen storage tank. Ensure that the rated pressure and flow of the safety valve comply with the tank's specifications and adhere to relevant safety standards and regulations.
Valve Installation Location: Select a suitable location for installing the safety valve. Typically, the safety valve should be mounted on the top or side of the liquid oxygen storage tank to allow for timely pressure release in the event of overpressure.
Preparation for installation interfaces: Prepare the corresponding interfaces based on the connection method of the safety valve. This may include welding interfaces, threaded interfaces, or flange interfaces, etc. Ensure the tightness and stability of the connections.
Install the safety valve: Mount the safety valve onto the prepared interface. Follow the installation instructions for the safety valve to ensure proper connection and tightening.
Adjustment and Testing: After installation, adjust and test the safety valve according to its specifications. Ensure that the opening and closing pressures of the safety valve meet the design requirements, and conduct a leakage test to verify its sealing.
Identification and Record: Label the safety valve with relevant information such as rated pressure, flow rate, and installation date. Additionally, record the installation details and test results of the safety valve for future reference and maintenance.
When installing the liquid oxygen storage tank safety valve, it is crucial to adhere to relevant safety regulations and operating guidelines. If you lack the necessary experience and knowledge, it is advisable to seek assistance and guidance from experts to ensure the correct installation and reliable operation of the safety valve.

When storing liquid nitrogen in low-temperature storage tanks, the following points should be noted:
Protective Gear: When handling low-temperature storage tanks, it is mandatory to wear appropriate protective gear, including gloves, protective clothing, and non-slip shoes. This gear safeguards the skin from the low temperatures of liquid nitrogen and other hazards.
Avoid direct contact: Liquid nitrogen is extremely cold and can cause frostbite. Hence, direct contact with liquid nitrogen should be avoided, especially with the skin. Use tools or utensils for handling to prevent direct contact with your hands.
Ventilation Requirements: In the operation area of low-temperature storage tanks, adequate ventilation must be ensured to expel gases produced by the evaporation of liquid nitrogen. Maintain air circulation to avoid excessive oxygen concentration, and reduce the risk of fire and explosion.
Prevent Leaks: Regularly inspect the low-temperature storage tank for leaks and equip with leak detectors and alarm systems. In case of a leak, take immediate action to control and repair it. Avoid the hazards of liquid nitrogen leaks to personnel and the environment.
Fire Prevention Measures: Liquid nitrogen has a low boiling and freezing point, which is prone to causing fires. To prevent and control fires, fire walls and fire-retardant coatings should be installed around low-temperature storage tanks.
Electrostatic Protection: Electrostatic buildup in low-temperature storage tanks may cause sparks, increasing the risk of fire. Measures should be
Our company attaches great importance to technological innovation and R&D, boasting one municipal enterprise technology center in Heze City. We have established testing facilities for non-destructive testing, physical and chemical testing, welding testing, hydrostatic testing, and more. We are equipped with over 600 instruments and equipment, including CNC machine tools, X-ray flaw detectors, digital ultrasonic flaw detectors, mechanical property testing machines, chemical analyzers, spectrometers, tensile testing machines, plasma welding machines, and others. The key products we have developed, such as temperature-pressure vessels for welding, biomass boiler emission reduction, and waste heat utilization, have successively been selected for multiple Shandong Provincial Department of Industry and Information Technology innovation projects, Shandong key projects, and Heze City innovation and excellence projects. We have accumulated a total of 27 authorized utility models, 16 authorized inventions, participated in drafting 2 standards, 2 industry standards, and registered 15 trademarks. The technical team of our company, in collaboration with Professor Yajiang Li of Shandong University, has developed deep cryogenic container processing technology, utilizing the international plasma arc + filler wire argon arc welding (PAW-GTAW) technology, which has been appraised as reaching an international level in deep cryogenic container manufacturing after provincial-level scientific and technological achievement evaluation. Choose Zhongjie Special Equipment, and let's create brilliance together!