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, B-grade boiler installation, and GB2/Class, GC2/Class pressure pipeline installation licenses, as well as equipment and machinery installation contracting qualifications. 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, and has 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 Storage Tanks are specialized equipment that require special attention to safety and an 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 operate strictly according to the operation manual and safety regulations. - **Fire Prevention Measures:** Liquid oxygen is highly oxidative and can easily cause fires and explosions. Open flames and sources of sparks and high temperatures should be prohibited around the storage tanks. Fire protection facilities and fire extinguishing equipment should be established, and regular inspections and maintenance should be conducted. - **Leakage Control:** In the event of a leakage, immediate measures should be taken to control the leak. Leaks can cause liquid oxygen to evaporate and increase oxygen concentrations, 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 layer should be inspected and maintained regularly to ensure its integrity and insulating properties. - **Safety Distance:** A certain safety distance should be maintained around the storage tanks to prevent the spread of fires, explosions, and leaks. The specific requirements for safety distances should be assessed and determined based on local regulations and standards. **Features:** - **High Oxidizing Properties:** Liquid oxygen is highly oxidative, supporting combustion and causing it to burn more intensely. Therefore, 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 generally around 2-5 bar. Therefore, when operating and maintaining liquid oxygen storage tanks, attention should be paid to pressure control and the safety of pressure relief devices. - **Low-Temperature Storage:** The liquid oxygen within the storage tanks is at a low temperature, usually around -183°C. Therefore, when contacting liquid oxygen storage tanks, 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 tank 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 conducted 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 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 coat the liquid oxygen storage tank to prevent corrosion and oxidation. Use appropriate cleaning agents during cleaning and avoid substances that react with liquid oxygen. Protective coatings or coating agents can be applied for coating protection.
Regular Maintenance: Conduct regular maintenance on liquid oxygen tanks, including 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 to ensure they are familiar with the safe 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 inspection records, for traceability and management purposes.
It's important that testing and maintenance of liquid oxygen storage tanks be conducted by trained personnel, following relevant safety operation procedures and standards. Additionally, a specific testing and maintenance plan should be established based on the tank's conditions and usage requirements, and executed as scheduled.

The installation of the safety valve in the liquid oxygen tank is a crucial component that ensures the tank can release pressure promptly in the event of overpressure, thereby protecting the tank and associated equipment. Below are the steps for installing the safety valve in the liquid oxygen tank:
Determine the rated pressure of the safety valve: Select an appropriate safety valve based on the design pressure and flow requirements of the liquid oxygen storage tank. Ensure that the rated pressure of the safety valve meets the tank's specifications and complies with relevant safety standards and regulations.
Valve Installation Location: Select a suitable location for installing the safety valve. Typically, the safety valve should be mounted on the top or side of the liquid oxygen storage tank to allow for timely pressure release in the event of overpressure.
Preparation for installation interfaces: Prepare the corresponding interfaces based on 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 it is correctly connected and securely fastened.
Adjustment and Testing: After installation, adjust and test according to the requirements of the safety valve. Ensure that the opening and closing pressures of the safety valve meet the design specifications, and conduct a leakage test to ensure its sealing.
Connect the exhaust pipe: The exhaust pipe of the safety valve should be properly connected to the outlet of the safety valve. The exhaust pipe should have sufficient diameter and flow capacity to ensure effective exhaust of overpressure gas when the safety valve is activated.
Identification and Record: Label the safety valve and discharge piping 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 safety valve on the liquid oxygen storage tank, it is imperative to follow relevant safety regulations and operational guidelines. If lacking the necessary experience and knowledge, it is advisable to seek assistance and guidance from professionals to ensure the correct installation and reliable operation of the safety valve.

The maintenance and protection of liquid argon tank accessories are crucial for ensuring the tank operates smoothly and extending its service life. Here are general methods for the maintenance and protection of liquid argon tank accessories:
Valve Maintenance: Regularly inspect and maintain valves in the tank accessories, including intake valves, exhaust valves, and safety valves. Ensure the valves operate smoothly and reliably with no leaks or jamming. Regularly lubricate the valves and clean any debris and dirt on them.
Pressure Relief Device Maintenance: The pressure relief devices (such as safety valves) in the accessories of liquid argon storage tanks are critical components for ensuring the internal pressure safety of the tank. Regularly inspect and test the operational status of the pressure relief devices to ensure their proper functioning. Clean and repair as necessary.
Sensor and Gauge Maintenance: Sensors and gauges in the liquid argon storage tank accessories are used for monitoring and controlling parameters such as the tank's temperature and pressure. Regularly calibrate and inspect the accuracy and reliability of the sensors and gauges. Keep the sensors and gauges clean and in proper working condition.
Insulation Protection: The insulation layer of liquid argon storage tank accessories is crucial for maintaining the low temperature state of liquid argon. Regularly inspect the integrity and insulating performance of the insulation layer, and repair or replace damaged insulation materials. Avoid mechanical damage or contamination to the insulation layer.
Cleaning and Anticorrosive Protection: Regularly clean the accessories of the tank, removing impurities and dirt from the surface. Periodically inspect and maintain the anticorrosive coating on the accessories to prevent corrosion and oxidation.
Regular inspections and maintenance: Conduct comprehensive inspections and maintenance of the liquid argon tank accessories on a regular basis, including appearance, fasteners, and seals. Promptly identify and address any damage, leaks, or other issues with the accessories.
Record and Document Management: Document each maintenance and service result, including the service date, content, identified issues, and corrective measures. Establish comprehensive management records and documents for tracking and managing the operational status of the attachments.
Note that maintenance and protection of liquid argon tank accessories should be performed by trained personnel, following relevant specifications and standards. Ensure safety during maintenance and operation, and consult with experts for accurate guidance.
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