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/Class pressure pipeline installation licenses, as well as a mechanical 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 certifications for the ISO9001 Quality Management System, ISO14001 Environmental Management System, OHSAS18001 Occupational Health and Safety Management System, and the American ASME/U2 certification.
Liquid Oxygen Stations are facilities used for storing and supplying liquid oxygen, with Liquid Oxygen Tanks being a crucial component of these stations. The Liquid Oxygen Tanks offer several important functions and features:
Store Liquid Oxygen: Liquid oxygen tanks are primarily used for storing liquid oxygen, cooling gaseous oxygen below its critical temperature to convert it into a liquid state. The storage density of liquid oxygen is high, allowing for the storage of large amounts of oxygen in a relatively small space.
Maintain Low Temperature: Liquid oxygen tanks are typically double-walled, with a vacuum layer between the inner and outer walls to minimize heat transfer and maintain low temperatures. This helps preserve the低温 state of the liquid oxygen, preventing premature vaporization.
Safety Design: The design and manufacturing process of liquid oxygen tanks must prioritize safety. They are typically made from high-strength materials like stainless steel or aluminum alloy to withstand high pressure and low-temperature requirements. Additionally, liquid oxygen tanks are equipped with safety valves, pressure sensors, and temperature sensors to ensure that the internal pressure and temperature of the tank remain within safe limits.
Supply System Connection: Liquid oxygen tanks are typically connected to the supply system to transport liquid oxygen to the required locations. The supply system includes liquid oxygen pumps, pipelines, and valves, etc., which are used to extract liquid oxygen from the tanks and deliver it to the user end.
Liquid oxygen tanks play a crucial role in storing and maintaining liquid oxygen at oxygen stations. Their design and operation must strictly adhere to relevant safety regulations and procedures to ensure the safety and reliability of the storage and supply process.

The use and operation of the liquid oxygen storage tank system require attention to the following points:
Safe Operation: When operating the liquid oxygen storage tank system, it is mandatory to adhere to the relevant safety operation procedures and standards to ensure the safety of the operators.
Tanks Selection: Choose liquid oxygen tanks that comply with regulations and standards, ensuring their quality and safety performance.
Tank Installation: Tanks should be installed on a solid foundation to ensure stability. Additionally, good ventilation should be maintained around the tank, and it should be kept away from flammable materials and heat sources.
Sealability Inspection: Regularly check the sealing performance of the storage tank system to ensure there are no leaks at valve and pipe connections.
Pressure Control: The tank system should be equipped with a pressure gauge and safety valve, with regular inspections and maintenance to ensure pressure remains within a safe range.
Fire Prevention Measures: Liquid oxygen has a high oxygen content and is highly flammable. Install firewalls around the storage tank system, prohibit smoking and open flames, and ensure safety.
Static Protection: During the operation of the liquid oxygen system, static electricity may cause sparks, increasing the risk of fire. Measures such as using 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 tank system 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: The use of the liquid oxygen system generates waste gas, which necessitates appropriate waste gas treatment measures to minimize environmental impact.
Above are the precautions to be taken when using the liquid oxygen storage tank system, ensuring operational safety and the normal operation of the system. During operation, it should be strictly followed the relevant operational procedures and safety operation requirements to avoid accidents.

Liquid Oxygen Storage Tanks are specialized equipment that require careful attention to safety and a thorough understanding of their characteristics. Below are the usage precautions and features of liquid oxygen storage tanks: **Precautions for Use:** - **Operation:** The operation of liquid oxygen storage tanks should be carried out by trained and experienced personnel. Operators should be familiar with the tank's structure, performance, and operating procedures, and must operate strictly according to the manual and safety regulations. - **Fire Prevention Measures:** Liquid oxygen is highly oxidizing and can easily cause fires and explosions. Open flames and sparks, as well as high-temperature objects, should be prohibited around the storage tank. Fire protection equipment and fire extinguishers should be established and regularly inspected and maintained. - **Leakage Control:** In the event of a leakage, immediate measures should be taken to control the leakage. Leaks can cause the evaporation of liquid oxygen and an increase in oxygen concentration, raising the risk of fire and explosion. A leakage alarm system should be established, and leakage control devices and personal protective equipment should be provided. - **Insulation Protection:** Liquid oxygen storage tanks should have good insulation protection to reduce evaporation and maintain low temperatures. The insulation should be regularly inspected and maintained to ensure its integrity and insulating properties. - **Safety Distance:** A certain safety distance should be maintained around the storage tank to prevent the spread of fires, explosions, and leaks. The specific requirements for safety distances should be assessed and determined according to local regulations and standards. **Features:** - **High Oxidizing Property:** Liquid oxygen is highly oxidizing and can support combustion more intensely. Therefore, special attention must be given to fire and explosion prevention measures when using liquid oxygen storage tanks. - **High Pressure Storage:** Liquid oxygen storage tanks typically store high-pressure oxygen, with pressures usually around 2-5 bar. Therefore, when operating and maintaining liquid oxygen storage tanks, attention must be paid to pressure control and the safety of pressure relief devices. - **Low-Temperature Storage:** The liquid oxygen in the storage tank is at a low temperature, usually around -183°C. Therefore, when contacting the liquid oxygen storage tank, appropriate protective measures should be taken.

The testing and maintenance procedures for liquid oxygen storage tanks encompass the following aspects:
Visual Inspection: Conduct regular visual inspections of liquid oxygen tanks, checking for corrosion, wear, and leakage on the tank surface to ensure the tank's exterior remains intact.
Pressure Testing: Regular pressure tests of the liquid oxygen storage tank are conducted to assess its pressure resistance. The tests should be carried out in accordance with relevant standards and regulations, ensuring the tank can withstand the designed working pressure.
Leak Detection: Regularly conduct leak detection on liquid oxygen tanks, including using leak detection equipment to inspect the tanks, to ensure their good sealing performance and no leakage issues.
Cleaning and Coating Protection: Regularly clean and apply protective coatings to liquid oxygen tanks to prevent corrosion and oxidation. Use appropriate cleaning agents during cleaning and avoid substances that react with liquid oxygen. Protective coatings can be applied using anti-corrosion coatings or protective agents.
Routine Maintenance: Regular maintenance of liquid oxygen tanks, including inspection and replacement of seals, valves, safety devices, etc., to ensure proper operation and safety.
Safety Training and Operating Procedures: Provide safety training for personnel using liquid oxygen tanks, ensuring they are knowledgeable about the safe operation procedures and precautions to prevent operation errors and accidents.
Documentation and Record Management: Establish testing and maintenance records for liquid oxygen storage tanks, including test results, maintenance logs, and inspection records, for traceability and management purposes.
It is essential that the testing and maintenance of liquid oxygen tanks be conducted by trained personnel, adhering to relevant safety operating procedures and standards. Additionally, a specific testing and maintenance plan should be developed based on the tank's condition and usage requirements, and executed according to the plan.
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