Shandong Zhongjie Special Equipment's main products include: fuel (gas) boilers, organic heat carrier boilers, biomass boilers, waste heat boilers, and other boiler products; vacuum insulation cryogenic pressure vessels such as LNG tanks, oxygen/nitrogen/argon tanks, and CO2 tanks; pressure vessel products such as denitrification engineering equipment, heat storage and energy storage equipment, and complete chemical equipment; central air conditioning and HVAC equipment such as ground (water) source heat pumps, air source units, water-cooled screw units, and air-cooled modules. Planned products include large-scale energy centers, LNG transport vehicles, LNG tank containers, and other green energy equipment.
The reasons for the peak popularity of low-temperature liquid storage tanks in recent years are as follows:
Increasing demand: With the development of industries, scientific research, and other fields, there is a growing demand for low-temperature liquids. Low-temperature liquid storage tanks can effectively store and supply liquid oxygen, liquid nitrogen, liquid gases, and other low-temperature liquids, meeting the needs of various sectors.
Technical Advancements: In recent years, the manufacturing and material technologies for low-temperature liquid storage tanks have continuously improved and innovated. The application of new insulating materials, advanced refrigeration systems, and safety control devices has enhanced the performance and safety of the tanks, making them more reliable and secure.
Increased environmental awareness: Low-temperature liquid storage tanks enable effective storage and utilization of low-temperature liquids, reducing energy waste and environmental pollution. Amidst the heightened environmental awareness, low-temperature liquid storage tanks, as environmentally friendly and energy-saving equipment, have garnered more attention and applications.
Emerging Application Fields: There is an increasing demand for cryogenic liquid storage tanks in emerging application fields. For instance, the application of liquid nitrogen in frozen food, biopharmaceuticals, and semiconductor manufacturing is becoming more widespread, driving the development of cryogenic liquid storage tanks.
Policy Support: The government has provided support and encouragement for the development of low-temperature liquid storage tanks. Through policy guidance and financial support, the industry has been promoted and expanded.
In summary, the peak status of low-temperature liquid storage tanks in recent years is primarily due to increasing demand, technological advancements, heightened environmental awareness, the development of new application fields, and policy support. These factors collectively propel the rapid growth of the low-temperature liquid storage tank industry.

Liquid argon storage tanks are equipment used for storing and transporting liquid argon, featuring the following characteristics:
Low-temperature retention performance: The liquid argon tank is equipped with special insulation materials and structural design, effectively maintaining the low-temperature state of liquid argon. The tank is internally lined with insulation to minimize heat conduction and loss, ensuring long-term storage of liquid argon.
High-sealing performance: The liquid argon storage tank boasts excellent sealing properties, effectively preventing any leakage or evaporation of liquid argon. The tank's valves, fittings, and seals, etc., are designed and manufactured with precision, ensuring reliable sealing performance.
High strength and corrosion resistance: The liquid argon tank is made of high-strength materials, capable of withstanding the high pressure and low temperature of liquid argon. Both the internal and external surfaces of the tank are specially treated for excellent corrosion resistance, able to withstand corrosion and oxidation from liquid argon.
Safety Performance: The liquid argon tank is equipped with multiple safety protection measures, including safety valves, pressure sensors, and level monitoring devices. These devices monitor and control the tank's pressure, temperature, and level, ensuring the tank operates within a safe range.
Reliability and Stability: The liquid argon storage tank has undergone rigorous design, manufacturing, and testing, offering excellent reliability and stability. The tank is capable of long-term stable storage and transportation of liquid argon, ensuring that the quality and performance of the liquid argon remain unaffected.
Easy to operate and maintain: The liquid argon storage tank is relatively simple to operate and maintain, equipped with valves and fittings that are easy to use. The maintenance work mainly includes regular inspections, cleaning, and repairs, which can extend the service life of the tank.
The performance characteristics of liquid argon tanks make them an essential storage and transportation device for liquid argon, widely used in scientific research, industry, and other fields. When using liquid argon tanks, it is imperative to strictly adhere to the relevant operational specifications and safety requirements to ensure safe usage.

One of the common drawbacks of pressure vessels during use is corrosion. Corrosion refers to the reaction between the metal surface and chemical substances in the environment, leading to damage to the metal surface and thinning of the material. The following are common corrosion drawbacks of pressure vessels:
Pitting Corrosion: Pitting corrosion refers to localized pits or holes that appear on the surface of a metal. This type of corrosion is often caused by corrosive substances present in the local environment, such as acids and salts.
Bacterial Corrosion: Bacterial corrosion is a form of corrosion caused by microorganisms. These can form a biofilm inside pressure vessels and produce acidic substances, leading to corrosion of the metal surface.
Punch Corrosion: Punch corrosion refers to the penetration corrosion phenomenon on the metal surface. This type of corrosion usually occurs due to damage or defects in the protective layer on the metal surface, allowing corrosive substances to directly contact the metal surface.
Stress Corrosion Cracking: Stress corrosion cracking occurs when metal surfaces are simultaneously subjected to stress and corrosive environments, leading to the formation and propagation of cracks. This type of corrosion is commonly found in pressure vessels operating under high stress and corrosive conditions.
Corrosion can lead to material thinning and reduced strength in pressure vessels, potentially causing severe consequences such as leaks or ruptures. Therefore, to address the corrosion issues in pressure vessels, the following measures should be taken:
Regularly inspect and evaluate the corrosion of pressure vessels, including methods such as visual inspections and non-destructive testing.
Implement corrosion prevention measures, such as coating protection, cathodic protection, and selecting appropriate materials, to minimize the occurrence and progression of corrosion.
Regularly clean and maintain pressure vessels to remove dirt and impurities that may cause corrosion.
Comply with relevant safety regulations and operational guidelines to ensure the safe and proper operation of pressure vessels.
For severely corroded pressure vessels, repairs or replacements may be necessary to ensure their safety and reliability.

When storing liquid nitrogen in low-temperature storage tanks, the following points should be noted:
Protective Gear: When operating 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. 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.
Ventilation Requirements: In the operational 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 tanks for leaks and equip them with leak detectors and alarm systems. In case of a leak, take immediate measures 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 fire. To prevent and contain fires, fire barriers and fire-retardant coatings are installed around low-temperature storage tanks.
Static protection: Electrostatic buildup in low-temperature storage tanks can cause sparks, increasing the risk of fire. Measures such as using static-conductive materials and anti-static equipment should be taken to reduce the accumulation and release of static electricity.
Regular Inspections and Maintenance: Conduct regular checks on the condition of low-temperature storage tanks and related equipment, including valves, pipes, pressure gauges, etc. Ensure the equipment is in perfect condition without any damage, and promptly repair or replace any damaged parts.
Waste Gas Treatment: Low-temperature storage tanks generate waste gas during operation, which requires appropriate waste gas treatment measures to minimize environmental impact.
Above are the precautions to be taken when storing liquid nitrogen in a low-temperature storage tank, to ensure operational safety and the normal operation of the tank. During operation, strict adherence to relevant operational procedures and safety requirements is necessary to prevent accidents.
Chongjie Special Equipment upholds the great vision of "Realizing employee dreams, creating customer value, and striving for the prosperity and strength of our motherland," and is dedicated to the development of green energy equipment. We contribute to society with high-quality, cost-effective products and services!