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 and GC2 grade pressure pipeline installation licenses, as well as qualifications for electromechanical equipment installation contracts. It is a member of the China Boiler and Water Treatment Association, the China Chemical Equipment Association, and a director unit of the Shandong Equipment Manufacturing Association. The company has also passed certifications for ISO9001 Quality Management System, ISO14001 Environmental Management System, OHSAS18001 Occupational Health and Safety Management System, and the American ASME/U2 certification.
Operation procedures for liquid oxygen storage tanks should be established based on specific tank design and usage requirements. Below are some common contents of general operation procedures for liquid oxygen storage tanks: Operator Training: Ensure operators have received relevant training for liquid oxygen storage tanks, understanding the tank's structure, performance, operation procedures, and safety considerations. Safety Inspections: Conduct necessary safety inspections before operating liquid oxygen storage tanks, including checking the tank's integrity, valve and pipeline sealing, and the condition of the insulation layer. Liquid Oxygen Supply: Ensure the liquid oxygen supply system is functioning properly, including checking the status of liquid oxygen supply pipelines, valves, and pressure gauges, and ensuring adequate supply. Tank Pressure Control: Monitor the pressure of liquid oxygen storage tanks to ensure it remains within a safe range. If necessary, control the tank's pressure by adjusting pressure valves or pressure relief devices. Leakage Control: Regularly inspect the sealing of tanks and pipelines to ensure no leaks. In case of leaks, take immediate measures for leakage control and notify relevant personnel. Fire Prevention Measures: Prohibit open flames and prevent sparks and high-temperature objects from contacting the storage tank. Establish fire prevention facilities and firefighting equipment, and conduct regular inspections and maintenance. Safety Distance: Maintain a certain safety distance around liquid oxygen storage tanks to prevent the spread of fires, explosions, and leaks. Maintenance and Repair: Regularly perform maintenance and repair on storage tanks, including cleaning the tank, inspecting the insulation layer, valves, and pipeline conditions, to ensure normal operation. Waste Disposal: Properly dispose of waste generated by liquid oxygen storage tanks, including residual liquid oxygen, waste gases, and liquids, in accordance with relevant environmental protection regulations and standards. It is important to note that operation procedures for liquid oxygen storage tanks should be established based on specific tank design and usage requirements and should comply with applicable regulations, standards, and safety guidelines. When operating liquid oxygen storage tanks, cooperate with local regulatory authorities and individuals to ensure the safety and reliability of the tanks.

To prevent hazards caused by static electricity in liquid oxygen storage tanks, the following measures can be taken:
Grounding: Ensure proper grounding of liquid oxygen storage tanks and associated equipment. Grounding helps release static electricity to the ground, reducing the likelihood of static buildup. Metal components such as tanks and pipes should be connected to a reliable grounding system.
Static dissipative materials: Use static dissipative materials to reduce the accumulation of static electricity. For example, apply conductive coatings or materials on the insulation layer of liquid oxygen tanks and pipelines to discharge static electricity to the ground.
Anti-static Equipment: Utilize anti-static equipment such as static-conductive pipes and hoses to minimize the accumulation and release of static electricity. These devices help channel static to the ground, reducing the occurrence of static sparks.
Static grounding wire: Install static grounding wires on liquid oxygen tanks and related equipment to discharge static electricity to the ground. These grounding wires should be connected to a reliable grounding system and be inspected and maintained regularly.
Electrostatic Discharger: Utilize an electrostatic discharger to neutralize static electricity. It does so by releasing opposite charges, reducing static buildup and the occurrence of sparks.
Electrostatic Safety Training: Conduct electrostatic safety training for personnel using liquid oxygen tanks to enhance their awareness and prevention of electrostatic hazards. The training content can include the principles of electrostatic formation, preventive measures, and emergency response procedures.
It is important to note that the electrostatic protection measures for liquid oxygen storage tanks should be designed and implemented by personnel, adhering to relevant safety operation procedures and standards. During operation, strict adherence to the prescribed operational procedures is required to prevent the generation of static sparks and ensure the safety of the tank.

The oxygen filling process for liquid oxygen tanks must adhere to specific operational procedures and safety measures. Here are the steps for filling a liquid oxygen tank:
Preparation: Ensure the tank and oxygen filling equipment are in good working condition, check the tank's sealing and the proper operation of the safety valve.
Connect equipment: Link the oxygenation equipment to the storage tank, ensuring the connection is sealed reliably.
Prepare liquid oxygen: Transfer liquid oxygen from the storage container to the oxygen storage tank of the filling equipment. During the transfer, be cautious to avoid any leakage of liquid oxygen and prevent contact.
Oxygen Filling Operation: Open the valve of the oxygen filling equipment and fill liquid oxygen from the oxygen storage tank into the storage tank. During the filling process, control the filling speed and pressure to avoid excessive pressure and temperature rise in the storage tank.
Monitoring and Control: During the aeration process, it is necessary to monitor the tank's pressure and temperature to ensure they remain within safe limits. In the event of any anomalies, oxygenation should be stopped immediately and appropriate actions taken.
Oxygen Filling Completed: Close the valve of the oxygen filling equipment and cease the oxygen filling operation once the tank reaches the required oxygen content or pressure.
Safety Handling: After oxygenation is complete, safety handling is required, including closing relevant valves and emptying any remaining liquid oxygen from the oxygenation equipment.
Note that liquid oxygen is highly oxidizing and flammable; the oxygen-filling process must strictly adhere to relevant safety operation procedures and standards. Operators should receive training and strictly follow the operational procedures and safety measures to ensure the safety and reliability of the oxygen-filling process.

The safety distance between liquid oxygen storage tanks and structures is typically dictated by relevant safety standards and regulations to ensure a safe distance and fire separation between them. The following are general reference safety distances for liquid oxygen storage tanks and structures:
Horizontal Clearance: The horizontal clearance between the liquid oxygen storage tank and the building is typically required to maintain a certain distance to prevent the tank from causing danger to the building in the event of a leak or accident. The specific clearance distance should be determined based on factors such as the tank's capacity, pressure, and the nature of the building, with a general recommendation to maintain a safe distance.
Vertical clearance: The vertical clearance between the liquid oxygen tank and the structure must also meet the relevant safety requirements. This is to prevent the tank from causing danger to the structure in the event of a leak or accident. Specific clearance requirements will be determined based on factors such as the tank's capacity, pressure, and the height of the structure, with a general recommendation to maintain a certain safety distance.
Fireproof Distance: Liquid oxygen has a high oxygen content and flammability, and in the event of a leak or accident, it may cause a fire. Therefore, a certain fireproof distance must be maintained between liquid oxygen storage tanks and buildings to ensure that the fire does not spread or pose a danger to the structures. Specific fireproof distance requirements
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