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 a machinery and electrical equipment installation contracting qualification. 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 the ISO9001 Quality Management System, ISO14001 Environmental Management System, OHSAS18001 Occupational Health and Safety Management System certifications, and the American ASME/U2 certification.
Chongjie Special Equipment Co., Ltd. is a company engaged in the manufacturing of low-temperature liquid storage tanks. They offer a range of tanks in various specifications and capacities, including liquid nitrogen, liquid oxygen, and liquid argon tanks.
The Zhongjie special-fitted low-temperature liquid storage tanks are made with high-quality materials and advanced manufacturing techniques, ensuring the tank's strength and seal integrity. The interior features special insulation materials and structural design, effectively reducing liquid evaporation losses.
The medium-temperature liquid storage tank from Zhongjie is characterized by the following features:
High Safety: Tanks are constructed with materials that offer excellent pressure and sealing properties, ensuring safe storage of low-temperature liquids.
Low Evaporation Loss: Insulating materials and structural design used inside the tank effectively reduce liquid evaporation loss, enhancing the tank's economic efficiency.
A variety of specifications and capacities available: Zhongjie offers a range of low-temperature liquid storage tanks in different specifications and capacities to meet various customer needs.
Customized Design: According to specific customer requirements, ZJET can provide customized design and manufacturing services to cater to various application scenarios.
Quantitative manufacturing process: Zhongjie is equipped with advanced manufacturing equipment and a skilled technical team, ensuring the quality and performance of the storage tanks.
In summary, Zhongjie Special Equipment's low-temperature liquid storage tanks offer high safety, low evaporation loss, and a variety of specifications, catering to storage and transportation needs for low-temperature liquids.

Protection techniques for liquid nitrogen storage tanks include the following:
Wear protective gear: When operating liquid nitrogen tanks, it is mandatory to wear appropriate protective equipment, including gloves, protective clothing, and non-slip shoes. This gear protects the skin from the low temperatures of liquid nitrogen and other hazards.
Avoid direct contact: Liquid nitrogen is extremely cold and can cause frostbite. Therefore, it is essential to avoid direct contact with liquid nitrogen, especially with the skin. Use tools or equipment for handling to prevent direct hand contact with liquid nitrogen.
Note Ventilation: In the operational area of the liquid nitrogen tank, 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 liquid nitrogen 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 harm to personnel and the environment from the leakage of liquid nitrogen.
Fire Prevention Measures: Nitrogen liquid has a low boiling and freezing point, which is prone to fire. To prevent and contain fires, fire barriers and fire-retardant coatings should be installed around nitrogen liquid storage tanks.
Static Dissipation: The accumulation of static electricity in liquid nitrogen tanks may cause sparks, increasing the risk of fire. Measures such as using static-conductive materials and anti-static equipment are taken to reduce the accumulation and release of static electricity.
Regular Inspections and Maintenance: Conduct regular checks on the condition of liquid nitrogen tanks and related equipment, including valves, pipes, pressure gauges, etc. Ensure that the equipment is in perfect condition, and promptly repair or replace any damaged parts.
Waste Gas Treatment: Liquid nitrogen tanks produce waste gas during operation, proper waste gas treatment must be implemented.

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 within storage tanks. If the pressure exceeds the set range, it triggers an alarm or automatically stops filling 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 tank.
Pressure Relief Device: Used to release gas into a safe area when the pressure inside the storage tank is too high, thereby reducing the pressure on the tank. The pressure relief device typically includes relief valves, relief pipes, etc.
Level sensor: Used to monitor the level changes of liquid oxygen inside storage tanks to ensure sufficient liquid oxygen levels and prevent overfilling.
Temperature Sensor: Used for monitoring temperature changes inside storage tanks to ensure the temperature of liquid oxygen within 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.

The filling of low-temperature liquid nitrogen tanks refers to the process of transferring liquid nitrogen from an external supply source into the storage tank. Below is an explanation of the filling process for low-temperature liquid nitrogen tanks:
Preparation: Before filling the liquid nitrogen tank, thorough preparation is required. This includes inspecting the tank's condition and safety, ensuring the interior is clean, free of impurities, and contaminants. Additionally, check the quality of the liquid nitrogen supply and the safety of the supply pipeline.
Connect supply source: Link the liquid nitrogen supply source to the liquid outlet of the storage tank. Ensure the connection is securely fastened to prevent leaks.
Control Liquid Level: During the bottling process, it is necessary to control the liquid nitrogen level to prevent overfilling or spillage. A liquid level gauge or a liquid level control system can be used to monitor and control the level.
Slow injection: The nitrogen liquid should be injected slowly to avoid drastic vaporization and increased pressure. Appropriate valves and flow control devices can be used to regulate the injection rate.
Monitor Pressure: During the canning process, it's essential to monitor the pressure of the storage tank to ensure it remains within the safe range. Pressure gauges or pressure sensors can be used for monitoring.
Canning Complete: Stop injecting liquid nitrogen when the liquid level reaches the predetermined filling amount or the tank's capacity limit. Disconnect from the supply source and ensure the sealing integrity of the filling port.
Safe Operation: Throughout the canning process, relevant safety regulations and operating guidelines must be followed. Liquid nitrogen is highly flammable at low temperatures, so operators must wear appropriate personal protective equipment and ensure there are no ignition sources in the operating environment.
When bottling liquid nitrogen, be mindful of its low-temperature properties and safety. Ensure safe operation and control during the bottling process to guarantee the safe operation of the storage tank and effective storage of the liquid nitrogen.
Our company highly values technological innovation and research and development. We possess one city-level technical center in Heze City and 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 welding technology for temperature and pressure vessels, emissions reduction in biomass boilers, and waste heat recovery, have successively been selected for multiple Shandong Provincial Department of Industry and Information Technology scientific and technological innovation projects, Shandong Provincial key projects, and Heze City innovative and excellent projects. We have accumulated a total of 27 authorized utility model patents, 16 authorized invention patents, participated in drafting 2 standards, 2 industry standards, and registered 15 trademarks. The technical team of our company, in collaboration with Professor Li Yajiang of Shandong University, has jointly developed deep cryogenic container processing technology, which adopts the international plasma arc + wire-filled tungsten inert gas arc welding (PAW-GTAW) technology. After the provincial scientific and technological achievement appraisal, the technology level has reached an international standard in the field of deep cryogenic container manufacturing. Choose ZJ Special Equipment, let's join hands to create brilliance together!