Shandong Zhongjie Special Equipment's main products include: fuel (gas) boilers, organic heat carrier boilers, biomass boilers, waste heat boilers, and other boiler products; vacuum insulation deep-chilled pressure vessels such as LNG tanks, oxygen/nitrogen/argon tanks, and CO2 tanks; pressure vessel products like denitrification engineering equipment, heat storage and energy storage equipment, and complete chemical equipment sets; central air conditioning and HVAC equipment such as ground (water) source heat pumps, air source units, water-cooled screw units, and air-cooled modular units. Planned products include large-scale energy centers, LNG transport vehicles, LNG tank containers, and other green energy equipment.
When using a 50-cubic-liter liquid oxygen storage tank, the following safety concerns should be noted:
Tank Pressure Control: Ensure that the liquid oxygen pressure inside the tank is always within the safe range. Monitor and control the tank's pressure to avoid risks posed by excessive or low pressure.
Leakage and Fire Prevention: Regularly inspect the seals of tanks and associated pipelines to prevent oxygen liquid leaks. Oxygen liquid is highly flammable and fire prevention measures must be taken to ensure there are no ignition sources around the tank.
Explosion Prevention Measures: Oxygen inside the liquid oxygen tank may cause an explosion upon contact with flammable materials. Ensure there are no flammable items around the tank and implement explosion prevention measures, such as explosion-proof electrical equipment and static grounding.
Safety valves and discharge systems: Tanks should be equipped with safety valves and discharge systems to prevent overpressure conditions. Ensure the proper functioning of the safety valves and the unobstructed flow of the discharge system.
Routine Maintenance and Inspection: Conduct regular maintenance and inspection of the storage tanks, including cleaning, coating protection, and corrosion prevention. Ensure the structural integrity and safety of the tanks.
Safety Operation and Training: Operators must undergo relevant safety training, familiarize themselves with the safety operation procedures and emergency response measures for liquid oxygen tanks. Adhere to the correct operational steps to ensure safe operation.
Environmental Monitoring: Regularly monitor environmental parameters such as oxygen concentration and temperature around the storage tanks to ensure safety.
Emergency Preparedness: Develop an emergency response plan, including measures for leaks, fires, and explosions. Equip with appropriate emergency equipment and firefighting supplies to handle unforeseen incidents.
Above are some safety issues to be aware of when using a 50-cubic-liter liquid oxygen storage tank. To ensure safety, it is recommended to follow relevant safety regulations and operation guidelines, and seek assistance and guidance from professionals when necessary.

Low-temperature industrial gas filling stations are equipment used to fill liquid low-temperature industrial gases (such as liquid oxygen, liquid nitrogen, liquid argon, etc.) into gas storage tanks. Below is some basic knowledge about low-temperature industrial gas filling stations:
Tank Type: Low-temperature industrial gas tanks typically use double-walled vacuum insulated tanks, with the inner wall for storing liquid gas and the outer wall for insulation to reduce heat transfer and evaporation losses of the liquid gas.
Filling Equipment: Low-temperature industrial gas storage tank filling stations include liquid-gas filling pumps, filling pipelines, flowmeters, pressure sensors, and other equipment. The liquid-gas filling pumps are used to extract liquid gases from storage tanks or gas cylinders and fill them into the target storage tank.
Filling Process: The operational procedure at the filling station generally includes the following steps: preparation (checking equipment, preparing filling medium), equipment connection (connecting filling pumps, pipelines, etc.), equipment activation (starting the filling pump, adjusting flow and pressure), filling operation (filling liquid gas into the target storage tank), monitoring and control (monitoring parameters such as pressure and flow during the filling process to ensure safety and quality), and completion (shutting down equipment, cleaning the work area).
Safety Measures: In the operation of low-temperature industrial gas storage tank filling stations, strict adherence to relevant safety operation procedures and standards is required. Operators should receive training to understand the properties and safety considerations of liquid gases. Additionally, filling stations should be equipped with safety equipment such as pressure sensors and safety valves to ensure safety during the filling process.
Quality Control: Quality control is required during the filling process at the filling station, including monitoring parameters such as the flow rate, pressure, and temperature of the filling medium to ensure accuracy and quality of the filling.
It's important to note that the operation of low-temperature industrial gas storage tank filling stations must be carried out by trained personnel and strictly adhere to relevant operating procedures and safety measures. Furthermore, the design and manufacturing of the filling stations should comply with applicable standards and regulations to ensure the safety and reliability of the equipment.

Maintaining and caring for liquid nitrogen tanks is crucial for ensuring their safe operation and extending their lifespan. Here are the maintenance methods for liquid nitrogen tanks:
Regular Inspections: Conduct regular inspections of the liquid nitrogen tank's exterior and interior, checking for leaks, corrosion, wear, or other damages. Pay special attention to the tank's interfaces, valves, and pipes to ensure proper functioning.
Cleaning and Defrosting: Regularly clean the exterior surface of the liquid nitrogen tank to remove dust and dirt. If there is ice or frost inside the tank, defrosting is required to maintain the normal operation of the tank.
Level Monitoring: Regularly monitor the liquid nitrogen tank's level to ensure the stored amount of liquid nitrogen remains within a safe range. In case of an abnormal level, adjust or replenish liquid nitrogen promptly.
Regular inspection and replacement of components: Conduct regular inspections and replacements of critical parts of liquid nitrogen storage tanks, such as safety valves, pressure sensors, and temperature sensors. Ensure the normal operation and accuracy of these components.
Inspect Insulation Layer: Regularly inspect the liquid nitrogen tank's insulation layer to ensure its integrity and insulating properties. If damage or aging of the insulation layer is found, it must be repaired or replaced promptly.
Regular Calibration: Regularly calibrate the gauges and sensors of liquid nitrogen tanks to ensure accuracy and reliability. Calibration should be performed in accordance with relevant standards and specifications.
Safety Training and Operating Procedures: Conduct regular safety training for liquid nitrogen tanks, ensuring operators are familiar with the safe operating procedures and emergency response measures.
Note that maintenance of liquid nitrogen tanks should be performed by trained and authorized personnel. Adhere to relevant safety regulations and operational guidelines to ensure the safety and effectiveness of maintenance work.

Liquid nitrogen tanks are equipment used for storing liquid nitrogen and are widely used in the following fields: Frozen Food and Refrigerated Logistics: Liquid nitrogen tanks are used in the frozen food and refrigerated logistics industry to freeze or refrigerate food and other perishable items, extending their shelf life and maintaining freshness. The low temperature of liquid nitrogen can quickly freeze food, preventing bacterial growth and spoilage. Laboratory Research: Liquid nitrogen tanks are used in scientific research and laboratories to provide liquid nitrogen as a coolant and freezing medium. The low temperature of liquid nitrogen can be used for cooling laboratory equipment, material research, superconducting electronics, and low-temperature physics. Metal Processing and Welding: Liquid nitrogen tanks are used in metal processing and welding for cooling and controlling the temperature of metals. Liquid nitrogen can rapidly cool metals, improve their hardness and strength, and reduce deformation and stress. Gas Storage and Supply: Liquid nitrogen tanks are also used for storing and supplying nitrogen gas. Liquid nitrogen can be evaporated into gaseous nitrogen for applications such as gas shielded welding, gas fire suppression systems, gas analysis, and laboratory gas supply. In summary, liquid nitrogen tanks are widely used in the fields of frozen food, laboratory research, metal processing, and gas supply, providing storage and supply functions for liquid nitrogen at application sites.
Our company places a high priority on technological innovation and R&D design. We have one municipal-level enterprise technology center in Heze City, equipped with testing facilities for non-destructive testing, physical and chemical testing, welding testing, hydrostatic testing, and more. We have over 600 pieces of equipment, including CNC machine tools, X-ray flaw detectors, digital ultrasonic flaw detectors, mechanical property testing machines, chemical analyzers, spectrometers, tensile testing machines, plasma welding machines, and others. The key products and technologies we have developed, such as welding for temperature and pressure vessels, emissions reduction in biomass boilers, and waste heat utilization, have successively been included in multiple Shandong Provincial Department of Industry and Information Technology science and technology innovation projects, key projects in Shandong Province, and Heze City innovation and excellence projects. We have accumulated 27 authorized utility models, 16 authorized inventions, participated in drafting 2 standards, 2 industry standards, and registered 15 trademarks. Our technical team, in collaboration with Professor Yajiang Li from Shandong University, has developed deep cryogenic container processing technology using the international plasma arc + wire filling tungsten inert gas arc welding (PAW-GTAW) technique. This technology has been appraised as reaching international standards in the field of deep cryogenic container manufacturing at the provincial level. Choose Zhongjie Special Equipment, and let's create brilliance together!