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 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 ventilation 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 Vessel: Liquid Oxygen Storage Tanks are high-pressure vessels capable of withstanding high pressure. Their design and manufacturing 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 tank must be able to withstand low-temperature environments to prevent evaporation of the liquid oxygen and the penetration of external heat.
Fireproof Design: Liquid oxygen has a high oxygen content and is highly flammable. The design of liquid oxygen storage tanks must incorporate fire prevention measures, such as installing firewalls and using fire-resistant coatings, to prevent fire outbreaks and spread.
Leak Control: Leaks in liquid oxygen storage tanks can lead to increased oxygen concentrations, heightening the risk of fire and explosion. Tanks must be equipped with leak detectors and alarm systems to promptly detect and control leaks, and to implement appropriate emergency measures.
Electrostatic Protection: Electrostatic buildup in liquid oxygen tanks may cause sparks, increasing the risk of fire. Tanks must employ measures such as electrostatic conductive materials and antistatic 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. In the event of pressure exceeding the set value, the safety valve will automatically release pressure, protecting the tank from potential damage.
Routine Inspections and Maintenance: Oxygen liquid storage tanks require regular inspections and maintenance

Prior to cooling the liquid oxygen tank, the following prerequisites must be met:
Clean Vessels: Ensure the interior of the tank is clean, free of impurities and contaminants. The tank should be properly cleaned and flushed to maintain its cleanliness.
Drainage and Exhaust: Empty the gas from the storage tank and expel it through the exhaust system to reduce the gas content within the tank. This helps minimize the interference of the gas on the cooling process.
Safety Precautions: Prior to cooling the liquid oxygen tank, necessary safety precautions must be taken. Liquid oxygen is highly flammable and has low-temperature characteristics. Operators should wear appropriate protective suits, gloves, and other personal protective equipment to ensure safe operation.
Temperature Control: During the cooling process of the liquid oxygen tank, the tank's temperature must be regulated. Typically, low-temperature mediums like liquid nitrogen are used to cool the tank, ensuring the tank's temperature gradually decreases below the boiling point of liquid oxygen.
Insulation and Heat Retention: Liquid oxygen tanks are typically designed with double or multi-layer structures, filled with insulating material in between to minimize heat transfer and evaporation of the liquid oxygen. Ensuring the integrity and excellent insulation of the insulation layer enhances the cooling efficiency of the tank.
Under the aforementioned preconditions, the cooling operation of the liquid oxygen tank may be conducted. The cooling process must strictly adhere to relevant safety regulations and operational guidelines to ensure the safe operation and use of the tank.

The process of using liquid oxygen storage tanks for pressure regulation and oxygen supply typically involves the following steps:
Liquid Oxygen Storage Tank Oxygen Supply System: Typically, a liquid oxygen storage tank oxygen supply system is installed, which includes a liquid oxygen storage tank, liquid oxygen transmission pipelines, and pressure regulating devices. The liquid oxygen in the storage tank is transported through the pipelines to the pressure regulating device.
Pressure Regulator: The pressure regulator is used to convert high-pressure liquid oxygen into the required low-pressure oxygen. It typically includes a pressure valve, a reducer, and a flowmeter. The pressure valve is used to control the oxygen pressure, the reducer is for reducing the high-pressure liquid oxygen to the necessary low pressure, and the flowmeter is for measuring the oxygen flow rate.
Oxygen Delivery Pipeline: Low-pressure oxygen from the pressure-reducing unit is transported through the pipeline to areas requiring oxygen supply, such as patient rooms, operating rooms, etc. The pipeline is typically made of stainless steel or plastic, offering excellent airtightness and corrosion resistance.
Oxygen Interface: Install oxygen interfaces at locations requiring oxygen supply, such as hospital beds or operating tables. Oxygen interfaces typically include an oxygen flow regulator and oxygen connectors, used for adjusting oxygen flow and connecting oxygen masks or tubes.
Oxygen supply and regulation: Adjust the pressure and flow of oxygen by controlling the pressure regulating valve of the pressure regulator. Adjust the oxygen flow and concentration according to the patient's needs, ensuring they receive an adequate oxygen supply.
Note that when using liquid oxygen storage tanks for pressure regulation and oxygen supply, it is crucial to adhere to the relevant equipment operation and safety procedures. Operators must have the necessary training and skills to ensure the smooth and safe operation of the oxygen supply system. Furthermore, regular inspections and maintenance of the system's equipment and pipelines are essential to ensure their proper functioning and safety.

Proper installation of the liquid oxygen storage tank safety valve is a crucial step to ensure the safe operation of the tank. Here are the installation steps for the liquid oxygen storage tank safety valve:
Select the appropriate safety valve: Choose a suitable safety valve based on the design pressure and flow requirements of the liquid oxygen storage tank. Ensure that the rated pressure and flow of the safety valve meet the tank's specifications and comply with relevant safety standards and regulations.
Valve Installation Location: Select an appropriate location for installing the safety valve. Typically, the safety valve should be mounted on the top or side of the liquid oxygen tank to allow for timely pressure release in the event of overpressure.
Preparation for installation interfaces: Prepare the corresponding interfaces according to the connection method of the safety valve. This may include welding interfaces, threaded interfaces, or flange interfaces, etc. Ensure the sealing and firmness 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 according to the safety valve specifications. Ensure the opening and closing pressures of the safety valve meet the design requirements, and conduct a leakage test to ensure its seal integrity.
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 imperative to adhere to the relevant safety regulations and operational guidelines. If you lack the necessary experience and knowledge, it is advisable to seek assistance and guidance from a professional to ensure the correct installation and reliable operation of the safety valve.
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