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 insulated cryogenic pressure vessels such as LNG tanks, oxygen/nitrogen/argon tanks, and CO2 tanks; pressure vessel products including denitrification engineering equipment, heat storage and energy storage equipment, and complete chemical equipment sets; central air conditioning and HVAC equipment such as ground (water) source heat pumps, air source units, water-cooled screw chillers, and air-cooled modular units. Planned products include large-scale energy centers, LNG transport vehicles, LNG tank containers, and other green energy equipment.
When initially using a liquid nitrogen tank, there are several precautions to consider for safe and effective operation. Here are some suggested guidelines:
Safe Operation: Liquid nitrogen is a cryogenic liquid with strong refrigerating and asphyxiating properties. When handling liquid nitrogen tanks, it is mandatory to wear appropriate personal protective equipment, such as insulated gloves and protective suits. Avoid direct contact with liquid nitrogen to prevent injury or other harm.
Ventilation Environment: Liquid nitrogen, upon evaporation, produces a significant amount of gas which may displace other gases, leading to a decrease in oxygen content in the air. Therefore, when using liquid nitrogen tanks, it is essential to ensure adequate ventilation in the operating area to prevent oxygen deficiency.
Tank Inspection: Before the first use of a liquid nitrogen tank, it should be carefully inspected for appearance and seal integrity. Ensure there are no obvious damages, leaks, or other safety hazards. If any issues are found, they should be repaired or the tank replaced promptly.
Tank Filling: Prior to the initial use of a liquid nitrogen tank, it is necessary to fill the tank with liquid nitrogen. During the filling process, follow the correct operational procedures and safety protocols to ensure a safe and reliable filling. Additionally, be mindful of controlling the filling speed and pressure to avoid excessive tank pressure and temperature increase.
Labeling and Record Keeping: Prior to the first use of the liquid nitrogen tank, relevant information should be labeled on the tank, such as the storage medium, capacity, manufacturing date, etc. It is also recommended to establish a usage record for the tank, including filling dates, filling quantities, usage status, etc., for future traceability and management.
Note that the use of liquid nitrogen tanks involves safety risks such as low temperatures and high pressures. Operators should receive training and strictly adhere to the relevant operational procedures and safety measures. If unfamiliar with the operation or have doubts, it is recommended to consult with individuals or relevant institutions for guidance.

Liquid Oxygen Storage Tanks are equipment used for storing and supplying liquid oxygen. Liquid oxygen is a state of oxygen cooled below its boiling point, converting it into a liquid form. Liquid oxygen storage tanks are typically designed with double or multi-layer structures, filled with insulating material in the middle to reduce heat transfer and the evaporation of liquid oxygen.
Liquid Oxygen Storage Tank Features:
High Purity: The liquid oxygen storage tank contains high purity liquid oxygen, typically exceeding 99.5% purity. This makes the liquid oxygen tank essential for applications requiring high purity oxygen, such as medical, industrial, and research fields.
Low Temperature: As the boiling point of liquid oxygen is -183°C, liquid oxygen storage tanks must have excellent insulation properties to maintain the low temperature of the liquid oxygen. Tanks are typically designed with double or multi-layer structures, filled with insulating material in between to reduce heat transfer and the evaporation of liquid oxygen.
High Pressure: Liquid oxygen storage tanks typically need to withstand high pressure to maintain their liquid state. The design and material selection of the tank must consider the pressure requirements of liquid oxygen to ensure the tank's safety and reliability.
Flammability: Liquid oxygen is highly flammable and supports combustion. Therefore, during the design and operation of liquid oxygen storage tanks, fire prevention measures must be implemented to ensure there are no ignition sources nearby, and appropriate fire extinguishing equipment is provided.
High Density: Liquid oxygen has a higher density, allowing liquid oxygen tanks to store more oxygen compared to gas oxygen. This gives liquid oxygen tanks an advantage in applications requiring large oxygen supplies, such as in the field.
The use of liquid oxygen tanks must strictly adhere to relevant safety regulations and operational guidelines to ensure the safe operation and usage of the tanks.

To safely utilize liquid oxygen storage tanks, attention should be paid to the following aspects:
Training: Personnel operating liquid oxygen tanks must receive training on the properties of liquid oxygen, safe operating procedures, and emergency response measures. Only trained personnel are authorized to operate liquid oxygen tanks.
Safety Operating Procedures: Establish and adhere to the safety operating procedures for liquid oxygen tanks, including proper operational procedures, protective measures, and emergency response plans. Ensure operators follow the procedures to minimize accident risks.
Equipment Inspection and Maintenance: Regularly inspect the status of liquid oxygen storage tanks and related equipment, including valves, pipelines, pressure gauges, etc. Ensure that the equipment is in perfect condition and promptly repair or replace any damaged parts.
Leakage Control: Equipped with leak detection and alarm systems to promptly identify and control leaks in liquid oxygen storage tanks. Upon detection of a leak, immediate action should be taken to contain the source of the leak and proceed with repairs.
Fire Prevention Measures: Liquid oxygen has a high oxygen content, which is prone to causing fires. Measures such as setting up fire barriers around liquid oxygen storage tanks and using fire-retardant coatings are taken to prevent fires from occurring and spreading.
Static protection: Electrostatic buildup in liquid oxygen tanks can 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.
Ventilation Requirements: Ensure adequate ventilation within the enclosed space of the liquid oxygen storage tank to expel gases produced by the evaporation of liquid oxygen. Avoid excessive oxygen concentration to minimize

When using a 50-cubic-liter liquid oxygen tank, the following safety issues should be noted:
Tank Pressure Control: Ensure the liquid oxygen pressure within the tank is consistently within the safe range. Monitor and control the tank's pressure to avoid risks posed by excessive or insufficient pressure.
Leakage and Fire Prevention: Regularly inspect the tanks and associated pipelines for seal integrity to prevent oxygen liquid leakage. Oxygen liquid is highly flammable and fire prevention measures must be implemented to ensure there are no ignition sources around the tanks.
Explosion Prevention Measures: Oxygen inside the liquid oxygen tank may cause an explosion upon contact with flammable materials. Ensure there are no flammable items around the tank and implement explosion prevention measures, such as explosion-proof electrical equipment and static grounding.
Safety valves and exhaust systems: Storage tanks should be equipped with safety valves and exhaust systems to prevent overpressure conditions. Ensure the proper operation of the safety valves and the unobstructed flow of the exhaust system.
Routine Maintenance and Inspection: Regularly perform maintenance and inspections on the storage tanks, including cleaning, coating protection, and corrosion prevention. Ensure the structural integrity and safety of the tanks.
Safety Operation and Training: Operators must undergo relevant safety training, familiarize themselves with the safe operation procedures and emergency response measures for liquid oxygen tanks. Adhere to correct operational steps to ensure safe operation.
Environmental Monitoring: Regularly monitor environmental parameters such as oxygen concentration and temperature around the storage tanks to ensure safety.
Emergency Preparedness: Develop an emergency response plan including measures for leaks, fires, and explosions. Equip with appropriate emergency equipment and firefighting supplies to handle unexpected incidents.
Above are some safety issues to be aware of when using 50-cubic-liter liquid oxygen tanks. To ensure safety, it is recommended to follow relevant safety regulations and operation guidelines, and seek assistance and guidance from experts when necessary.
Zhongjie Special Equipment adheres to the grand vision of "realizing employees' dreams, creating value for customers, and striving for the prosperity and strength of our motherland," and is dedicated to the development of the green energy equipment industry. We commit to society with high-quality, cost-effective products and services!