Shandong Zhongjie Special Equipment's main products include: fuel (gas) boilers, organic heat carrier boilers, biomass boilers, waste heat recovery boilers, and other boiler products; vacuum insulation deep-freeze pressure vessels such as LNG storage tanks, oxygen/nitrogen/argon storage tanks, and CO2 storage tanks; pressure vessel products like denitrification engineering equipment, heat storage and energy storage equipment, and complete chemical equipment sets; central air conditioning and ventilation 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 tank, the following safety precautions should be observed:
Tank Pressure Control: Ensure the liquid oxygen pressure within the tank remains within the safe range. Monitor and control the tank's pressure to prevent risks from excessive or low pressure.
Leakage and Fire Prevention: Regularly inspect the tanks and associated pipelines for sealing integrity to prevent oxygen liquid leakage. Oxygen liquid is highly flammable, and fire prevention measures must be implemented to ensure there are no ignition sources around the tanks.
Explosion-proof measures: Oxygen in 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-proof measures, such as explosion-proof electrical equipment and static grounding.
Safety Valves and Emission Systems: Storage tanks should be equipped with safety valves and emission systems to prevent overpressure conditions. Ensure the proper functioning of the safety valves and the unobstructed flow of the emission systems.
Routine Maintenance and Inspection: Conduct regular maintenance and inspection of the storage tanks, including cleaning, coating protection, and anti-corrosion treatment. Ensure the structural integrity and safety of the tanks.
Safety Operations and Training: Operators must undergo relevant safety training, familiarize themselves with the safe operation procedures and emergency response measures for liquid oxygen tanks. Adhere to correct operational steps to ensure safe operations.
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 gear to handle unforeseen incidents.
Above are some safety issues to be aware of when using a 50-cubic-liter liquid oxygen 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 basic information about low-temperature industrial gas filling stations:
Tank Type: Low-temperature industrial gas tanks commonly 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 loss 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 gas from storage tanks or gas cylinders and fill it into the target storage tank.
Filling Process: The operational procedure at the filling station generally consists of the following steps: preparation (checking equipment, preparing filling medium), connecting equipment (hooking up filling pumps, pipelines, etc.), starting equipment (turning on the filling pump, adjusting flow and pressure), filling operation (transferring liquid gas into the target storage tank), monitoring and control (monitoring parameters like pressure and flow during the filling process, ensuring safety and quality), and completion (shutting down equipment, cleaning the work area).
Safety Measures: Strict adherence to relevant safety operation procedures and standards is required during the operation of low-temperature industrial gas filling stations. Operators must undergo 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 the safety during the filling process.
Quality Control: Quality control must be conducted at the filling station during the filling process, including monitoring parameters such as flow rate, pressure, and temperature of the filling medium to ensure accuracy and quality of the filling.
It is important to note that the operation of low-temperature industrial gas filling stations must be conducted by trained personnel and strictly adhere to the relevant operational procedures and safety measures. Additionally, the design and manufacturing of the filling stations must comply with applicable standards and regulations to ensure the safety and reliability of the equipment.

Maintenance and care of liquid nitrogen tanks are crucial for ensuring safe operation and extending their lifespan. Here are the maintenance and care 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 damage. Pay special attention to the tank's interfaces, valves, and piping, ensuring they are functioning properly.
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 quantity of liquid nitrogen remains within a safe range. In case of an abnormal level, adjustments or replenishment of liquid nitrogen are required promptly.
Inspection and Replacement of Parts: Regularly inspect and replace critical components of the liquid nitrogen storage tank, such as safety valves, pressure sensors, and temperature sensors. Ensure the normal operation and accuracy of these parts.
Inspect the Insulation: Regularly check the liquid nitrogen tank's insulation for integrity and thermal performance. If damage or aging of the insulation 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 conducted in accordance with relevant standards and specifications.
Safety Training and Operating Procedures: Conduct regular safety training for liquid nitrogen storage tanks to ensure 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 operating guidelines to ensure the safety and effectiveness of maintenance work.

Liquid nitrogen tanks are equipment used for storing liquid nitrogen, widely applied in the following fields: Frozen Food and Cold Chain Logistics: Liquid nitrogen tanks are utilized in the frozen food and cold chain logistics industry to freeze or chill food and other perishable items, extending their shelf life and freshness. The low temperature of liquid nitrogen allows for rapid freezing of food, preventing bacterial growth and spoilage. Medical Research and Biomedical Engineering: Liquid nitrogen tanks are extensively used for cryopreserving biological samples, cells, tissues, and more. The low temperature of liquid nitrogen effectively preserves the integrity and viability of biological materials, applicable in fields such as medical research, biomedical engineering, and transplantation. Laboratory Research: In scientific research and laboratories, liquid nitrogen tanks are used to supply liquid nitrogen as a coolant and freezing medium. The low temperature of liquid nitrogen is suitable for cooling laboratory equipment, material research, superconducting electronics, and low-temperature physics. Metalworking and Welding: Liquid nitrogen tanks are employed in metalworking and welding for cooling and temperature control. Liquid nitrogen can rapidly cool metals, improving their hardness and strength while reducing 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 applied in the fields of frozen food, laboratory research, metalworking, and gas supply, providing storage and supply functions for liquid nitrogen at application sites.
Our company highly values technological innovation and research and development design, boasting 1 municipal-level enterprise technology center in Heze City. We have established testing facilities for non-destructive testing, physical and chemical testing, welding testing, hydrostatic testing, and more, equipped with over 600 instruments and 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 more. Our R&D of key products such as temperature and pressure vessel welding, biomass boiler emission reduction, and waste heat utilization has been selected for several Shandong Province Department of Industry and Information Technology scientific and technological innovation projects, Shandong Province key projects, and Heze City innovative and excellent projects. We have cumulatively obtained 27 authorized utility models, 16 authorized inventions, participated in drafting 2 standards, 2 industrial standards, and registered 15 trademarks. Our technical team, in collaboration with Professor Li Yajiang of Shandong University, has jointly developed deep cryogenic container processing technology using the international plasma arc + filler wire tungsten inert gas (PAW-GTAW) technology. This technology has been appraised at the provincial level, achieving international standards in the field of deep cryogenic container manufacturing. Choose ZJ Special Equipment, let's create brilliance together!