Shandong Zhongjie Special Equipment Co., Ltd. specializes in the following products: fuel (gas) boilers, organic heat carrier boilers, biomass boilers, waste heat recovery boilers, and other boiler products; vacuum insulation cryogenic pressure vessels such as LNG storage tanks, oxygen/nitrogen/argon storage tanks, and CO2 storage tanks; pressure vessel products including 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 modular units. Planned products include large-scale energy centers, LNG transport vehicles, LNG tank containers, and other green energy equipment.
Liquid Oxygen Storage Tanks Feature the Following Safety Technical Characteristics:
High-pressure Vessels: Liquid oxygen tanks are high-pressure vessels capable of withstanding high pressure. Their design and manufacture must comply with relevant standards and regulations to ensure the tank's strength and sealing integrity.
Low Temperature Storage: Liquid oxygen tanks are used for storing liquid oxygen, with operating temperatures typically around -183 degrees Celsius. The materials and insulation of the tanks must withstand low-temperature environments to prevent evaporation of the liquid oxygen and the penetration of external heat.
Fireproof Design: Liquid oxygen contains a high oxygen concentration, which is prone to causing fires. The design of liquid oxygen storage tanks must incorporate fire prevention measures, such as installing firewalls and using fire-resistant coatings, to prevent the occurrence and spread of fires.
Leakage Control: Leaks in liquid oxygen storage tanks can lead to increased oxygen concentrations, raising the risk of fire and explosion. Tanks must be equipped with leak detection and alarm systems to promptly identify and control leaks, and to implement appropriate emergency measures.
Static protection: The accumulation of static electricity in liquid oxygen tanks may cause sparks, increasing the risk of fire. Tanks must implement measures such as using conductive materials and anti-static equipment to reduce the accumulation and release of static electricity.
Safety valves and pressure control: Liquid oxygen storage tanks must be equipped with safety valves and pressure control devices to ensure the internal pressure of the tank remains within a safe range. When the pressure exceeds the set value, the safety valve will automatically release pressure to protect the tank's safety.
Regular inspections and maintenance: Liquid oxygen tanks require regular inspections and maintenance

Carbon dioxide tanks and liquid oxygen tanks are containers used for storing different gases; they have some distinct physical properties:
Physical State: Carbon dioxide is a gas at room temperature and pressure, and it needs to be at low temperatures and high pressures to convert into a liquid state. Liquid oxygen is a liquid at room temperature, and it must be at low temperatures to solidify.
Boiling and Freezing Points: The boiling point of carbon dioxide is -78.5°C, and its freezing point is -56.6°C. The boiling point of liquid oxygen is -183°C, and its freezing point is -218.8°C. The boiling and freezing points of liquid oxygen are significantly lower than those of carbon dioxide.
Density: The density of liquid oxygen is relatively high, at about 1.14 grams per cubic centimeter. Carbon dioxide has a lower density, approximately 0.00198 grams per cubic centimeter. The density of liquid oxygen is about 570 times that of carbon dioxide.
Pressure: Liquid oxygen has a higher pressure, typically ranging from tens to hundreds of MPa (Megapascals). Carbon dioxide has a lower pressure, usually within a few MPa (Megapascals).
Safety: Liquid oxygen has a high oxygen content, which is prone to cause fires and explosions. Carbon dioxide also poses asphyxiation and suffocation risks at certain concentrations.
Note that carbon dioxide and liquid oxygen are both highly flammable and explosive substances. Strict adherence to relevant safety operating procedures and standards, along with necessary safety measures, must be taken to ensure the tank's safety and stability during storage and use.

The normal pressure range for liquid oxygen tanks is typically between 2-5 bar. This range refers to the oxygen pressure inside the liquid oxygen tank, which is used to maintain the liquid oxygen in its liquid state. The design and manufacturing of liquid oxygen tanks must comply with relevant standards and regulations to ensure they can safely withstand this pressure range under normal operating conditions. It should be noted that the pressure in liquid oxygen tanks can be affected by various factors, such as the temperature of the liquid oxygen, the tank's design, and materials. In actual use, the normal pressure range of the tank should be determined based on specific tank design and usage requirements, and operations and maintenance should adhere to relevant laws and standards. Additionally, liquid oxygen tanks should be equipped with pressure control devices, such as pressure valves or relief devices, to ensure that the internal pressure of the tank remains within a safe range. These devices can automatically release gas when the pressure exceeds the set value, ensuring the tank's safety. When using liquid oxygen tanks, these pressure control devices should be inspected and maintained regularly to ensure their proper functioning.

To extend the service life of liquid argon storage tanks, the following measures can be taken:
Regular inspections and maintenance: Conduct periodic visual inspections of the liquid argon storage tank, check valves and fittings, as well as leak detection and pressure tests, etc. Identify and repair potential issues promptly to ensure the normal operation of the tank.
Maintain the insulation layer: The insulation layer is crucial for the thermal retention of liquid argon tanks. Regularly inspect the integrity and insulating properties of the insulation layer, repair or replace damaged insulation materials to ensure the tank's thermal insulation effect.
Control Liquid Argon Temperature: Maintain the liquid argon at an appropriate temperature range to prevent damage to the storage tank from excessive or insufficient temperatures. Implement suitable cooling or heating measures to ensure stable temperature of the liquid argon.
Corrosion Protection: The shell and internal structure of the liquid argon tank should be protected against corrosion and oxidation. Regularly inspect and maintain the protective coating to ensure its integrity.
Avoid excessive pressure and overfilling: Prevent the internal pressure of the tank from being too high or too low, as well as overfilling with liquid argon. Excessive pressure and overfilling can lead to structural破裂 or damage to the tank.
Regular Cleaning and Drainage: Regularly clean the interior of the tank to remove accumulated impurities and dirt. Regularly drain to prevent contaminants and sediments in liquid argon from damaging the tank.
Safety Operation and Training: Ensure operators are knowledgeable and skilled in the safe operation of liquid argon tanks. Enhance safety training to boost operators' safety awareness and emergency response capabilities.
Manage records and documents: Establish comprehensive management records and documents, including the usage of tanks, inspection records, and maintenance records. Regularly review and update management records to ensure safe management and maintenance of the tanks.
These measures can help extend the service life of liquid argon tanks, but specific operations and management should be tailored to the type and application of the tank. When conducting maintenance and operation, please follow relevant regulations and standards, and consult experts to ensure safety and effectiveness.
Our company attaches great importance to technological innovation and R&D design. We have one city-level enterprise technology center in Heze City, equipped with testing facilities for non-destructive testing, physical and chemical testing, welding testing, hydrostatic testing, etc. We have over 600 various equipment and instruments, 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 more. The key products we have developed, such as temperature and pressure vessel welding, biomass boiler emission reduction, and waste heat utilization, have successively been selected for multiple Shandong Provincial Department of Industry and Information Technology science and technology innovation projects, Shandong Provincial key projects, and Heze City innovation and excellence projects. We have accumulated 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 using the international plasma arc + filler wire tungsten inert gas arc welding (PAW-GTAW) technology. After the provincial-level scientific and technological achievement evaluation, the technology level has reached an international standard in the field of deep cryogenic container manufacturing. Choose Zhongjie Special Equipment, and let's create brilliance together!