Shandong Zhongjie Special Equipment (formerly Heze Boiler Factory Co., Ltd.) holds an A-grade boiler manufacturing license, A2-grade pressure vessel manufacturing license, 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 member 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.
The safety distance for liquid oxygen storage tanks refers to the distance that must be maintained around the tank to ensure the safety of personnel and equipment. The specific requirements for safety distances may vary depending on different regions and application sites. Here are some common principles for safety distances: Buildings and Equipment: Liquid oxygen storage tanks should be kept at a certain distance from buildings, equipment, and other storage tanks to prevent the spread of fires, explosions, and leaks. The specific safety distance requirements should be assessed and determined based on local regulations and standards. Fire Sources and Heat Sources: Liquid oxygen is highly oxidizing and can easily cause fires and explosions. Therefore, liquid oxygen storage tanks should be kept at a sufficient distance from fire sources, heat sources, and flammable materials to prevent fires and explosions. Ventilation and Exhaust: Good ventilation and exhaust should be maintained around liquid oxygen storage tanks to prevent the accumulation of evaporated liquid oxygen and the formation of explosive mixtures. The design and operation of the ventilation and exhaust system should comply with relevant safety standards and specifications. Personnel and Traffic: Personnel and traffic around liquid oxygen storage tanks should be restricted and controlled to ensure personnel safety and the normal operation of the tank. Warning signs, safety fences, and restricted areas should be established to prevent unauthorized personnel from entering the tank area. It is important to note that the safety distance for liquid oxygen storage tanks should be assessed and determined based on the specific application site and safety requirements. When designing, installing, and operating liquid oxygen storage tanks, relevant regulations, standards, and safety guidelines should be followed to ensure the safety and reliability of the tank.

The use and operation of the liquid oxygen storage tank system should be mindful of the following points:
Safe Operation: When operating the liquid oxygen storage tank system, it is mandatory to follow relevant safety operation 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 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 leakage issues at valve and pipeline connections.
Pressure Control: Storage systems should be equipped with pressure gauges and safety valves, with regular inspections and maintenance to ensure pressure remains within safe limits.
Fire Prevention Measures: Liquid oxygen contains a high oxygen content, which is prone to causing fires. 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: Conduct regular checks on the storage tank system and associated equipment, including valves, pipelines, pressure gauges, etc. Ensure that equipment is in good condition and promptly repair or replace any damaged parts.
Waste Gas Treatment: During the operation of the liquid oxygen system, waste gas is 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 relevant operational procedures and safety requirements should be maintained to avoid accidents.

The reason for occasional venting of liquid oxygen tanks is primarily to maintain the safe pressure range within the tank and prevent excessive pressure buildup. Here are several scenarios where liquid oxygen tanks may vent occasionally:
Pressure Control: During the operation of the liquid oxygen tank, due to evaporation of the liquid oxygen and temperature changes, the pressure inside the tank will vary. To maintain a safe pressure range within the tank, regular venting is required to control the tank pressure within the safe limits.
Prevent Overpressure Accumulation: During oxygen filling or usage, external factors or operational errors may cause the pressure inside the liquid oxygen tank to exceed the safe limit. To prevent overpressure accumulation, timely venting is required to alleviate the pressure within the tank.
Prevent Gas Accumulation: There may be some gas impurities, such as air and water vapor, in liquid oxygen storage tanks. These gases will condense into liquids or solids at the low temperatures of liquid oxygen, potentially blocking pipelines or affecting the normal operation of the tank. Regular venting can expel these impurities, maintaining the tank's cleanliness and unobstructed flow.
Note that the venting operation of liquid oxygen should be performed by authorized personnel and strictly adhere to the relevant operational procedures and safety measures. During the venting process, attention should be given to prevent any leakage of liquid oxygen and contact with it, ensuring the safety and reliability of the operation.

The maintenance and protection of liquid argon cylinder accessories are crucial for ensuring the normal operation and extending the service life of the cylinders. The following are general methods for the maintenance and protection of liquid argon cylinder accessories:
Valve Maintenance: Regularly inspect and maintain valves within the storage tank accessories, including intake valves, exhaust valves, and safety valves. Ensure valves operate smoothly and reliably, without leaks or sticking. Regularly lubricate the valves and clean any debris and dirt.
Pressure Relief Device Maintenance: The pressure relief devices (such as safety valves) in the liquid argon storage tank accessories are critical components for ensuring the safety of the internal pressure of the tank. Regularly inspect and test the operational status of the pressure relief devices to ensure proper functioning. Clean and repair as needed.
Sensor and gauge maintenance: Sensors and gauges in the liquid argon storage tank accessories are used to monitor and control parameters such as tank temperature and pressure. Regularly calibrate and inspect the accuracy and reliability of the sensors and gauges. Keep the sensors and gauges clean and in normal 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 insulation 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 surfaces. 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 liquid argon cylinder accessories on a regular basis, including appearance, fasteners, seals, etc. Detect and address any damage, leaks, or other issues with the accessories promptly.
Record and Document Management: Document each maintenance and service outcome, including dates, services performed, identified issues, and measures taken. Establish comprehensive management records and documentation to facilitate tracking and management of the equipment's operational status.
Note that maintenance and protection of liquid argon tank accessories should be performed by trained personnel and in accordance with relevant specifications and standards. Ensure safety during maintenance and operation, and consult with experts for accurate guidance.
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