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 the理事 unit of the Shandong Equipment Manufacturing Association. The company has also passed the ISO9001 Quality Management System, ISO14001 Environmental Management System, OHSAS18001 Occupational Health and Safety Management System certifications, and the American ASME/U2 certification.
Liquid Oxygen Stations are facilities used for storing and supplying liquid oxygen, with liquid oxygen storage tanks being a crucial component of these stations. The liquid oxygen storage tanks possess several key 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. Liquid oxygen has a high storage density, 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: During the design and manufacturing process, liquid oxygen tanks must prioritize safety. They are typically made from high-strength materials such as stainless steel or aluminum alloy to withstand high pressure and low-temperature conditions. Additionally, the tanks are equipped with safety valves, pressure sensors, and temperature sensors to ensure the internal pressure and temperature remain within safe limits.
Supply System Connection: Liquid oxygen tanks are typically connected to the supply system for delivering liquid oxygen to the required locations. The supply system consists of equipment such as liquid oxygen pumps, pipes, and valves, which are used to extract liquid oxygen from the tanks and transport it to the customer end.
Liquid oxygen tanks play a crucial role in storing and maintaining liquid oxygen in liquid 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 operating procedures and standards to ensure the safety of the operators.
Tank Selection: Choose liquid oxygen tanks that meet specifications and standards, ensuring their quality and safety performance.
Tank Installation: Tanks should be installed on a solid foundation to ensure stability. Additionally, good ventilation around the tank is required, and it should be kept away from flammable materials and heat sources.
Sealability Inspection: Regularly check the seal performance of the storage tank system to ensure there are no leakage phenomena at valve and pipe connections.
Pressure Control: The storage tank system should be equipped with a pressure gauge and safety valve, with regular inspections and maintenance to ensure pressure remains within safe limits.
Fire Prevention Measures: Liquid oxygen contains a high concentration of oxygen, which 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 static-conductive materials and anti-static equipment should be taken to reduce the accumulation and release of static electricity.
Regular inspections and maintenance: Regularly check the status of the storage tank system and related equipment, including valves, pipes, pressure gauges, etc. Ensure the equipment is in good condition without damage, and promptly repair or replace any damaged parts.
Waste Gas Treatment: During the operation of the liquid oxygen system, waste gases are produced, and appropriate waste gas treatment measures must be taken to minimize environmental impact.
Above are the matters to be noted when using the liquid oxygen storage tank system, ensuring operational safety and the normal operation of the system. During operation, strict adherence to the relevant operational procedures and safety requirements should be maintained to avoid accidents.

Liquid Oxygen Storage Tanks are specialized equipment that requires particular attention to safety and an understanding of their characteristics. Below are the safety precautions and features of using liquid oxygen storage tanks: **Safety Precautions:** - **Operation:** Operation of the liquid oxygen storage tank should be conducted by trained personnel with relevant experience. Operators must be familiar with the tank's structure, performance, and operational procedures, and should 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 contact with 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 leak in the liquid oxygen storage tank, immediate measures should be taken to control the leakage. Leaks can lead to evaporation of liquid oxygen and increased oxygen concentration, which can heighten the risk of fire and explosion. A leakage alarm system should be set up, along with leakage control devices and personal protective equipment. - **Insulation Protection:** Liquid oxygen storage tanks should have good insulation 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 liquid oxygen storage tank to prevent the spread of accidents such as 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. Special attention to fire and explosion prevention measures is required 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. Pressure control and the safety of pressure relief devices should be noted during operation and maintenance. - **Low-Temperature Storage:** The liquid oxygen in the storage tank is at a low temperature, usually around -183°C. 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:
Appearance Inspection: Regularly inspect the liquid oxygen tank for any signs of corrosion, wear, or leakage on the surface to ensure the tank's appearance remains intact.
Pressure Testing: Regularly conduct pressure tests on liquid oxygen tanks to assess their pressure resistance. The tests should be carried out in accordance with relevant standards and regulations, ensuring the tanks can withstand the designed working pressure.
Leak Detection: Regularly conduct leak detection on liquid oxygen storage tanks, including using leak detection equipment to inspect the tanks, to ensure good sealing performance and no leakage issues.
Cleanliness 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, such as anti-corrosion coatings or protective agents.
Routine Maintenance: Regular maintenance of liquid oxygen tanks includes inspections and replacements of seals, valves, safety devices, etc., to ensure normal operation and safety.
Safety Training and Operating Procedures: Conduct safety training for personnel using liquid oxygen tanks, ensuring they are aware of the safety operating procedures and precautions to avoid operational errors and accidents.
Record and Document Management: Establish test and maintenance records for liquid oxygen storage tanks, including test results, maintenance records, and repair records, for traceability and management purposes.
It is important to note that the testing and maintenance of liquid oxygen tanks should be conducted by trained personnel, following the relevant safety operating procedures and standards. Additionally, a corresponding testing and maintenance plan should be developed based on the specific conditions and usage requirements of the tank, and executed according to the plan.
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