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, a B-grade boiler installation license, and GB2/Class, GC2/Class pressure pipeline installation licenses, as well as an electromechanical equipment installation contracting qualification. It is a member of the China Boiler and Water Treatment Association, the China Chemical Equipment Association, and the council unit 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.
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:
Storage Tank Type: Low-temperature industrial gas storage tanks typically use double-walled vacuum insulated storage tanks, with the inner wall for containing liquid gas and the outer wall for thermal 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 pump is used to extract liquid gas from storage tanks or gas containers and fill it into the target storage tank.
Filling Process: The operational procedure at the filling station typically includes the following steps: Preparations (checking equipment, preparing filling medium), Equipment Connection (connecting filling pumps, pipes, 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 of Operation (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 operating procedures and standards is required. Operators should receive training to understand the properties and safety precautions of liquefied 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 essential 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 should be noted that the operation of low-temperature industrial gas filling stations requires trained personnel and strict adherence to operational procedures and safety measures. Additionally, the design and manufacture of filling stations must comply with relevant standards and specifications to ensure the safety and reliability of the equipment.

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 storage 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 aeration equipment to the storage tank, ensuring a secure and sealed connection.
Prepare liquid oxygen: Transfer liquid oxygen from the storage container to the storage tank of the oxygen-filling equipment. During the transfer, be cautious to avoid any leakage or contact with the liquid oxygen.
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, the tank's pressure and temperature must be monitored to ensure they remain within safe limits. In case of any anomalies, aeration should be halted immediately and appropriate measures should be taken.
Oxygen Filling Completed: Close the valve of the oxygen filling equipment and stop 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 draining 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 stable pressure design of a 15 cubic meter liquid argon storage tank requires consideration of the following aspects:
Tank Pressure: Determine the design pressure of the tank to meet the storage and supply requirements for liquid argon. Establish an appropriate design pressure range based on the properties and usage conditions of liquid argon.
Stabilization System: Select an appropriate stabilization system to maintain stable pressure within the storage tank. The stabilization system typically includes components such as pressure regulators, pressure sensors, and control valves, which are used for monitoring and adjusting the pressure inside the tank.
Pressure Sensors: Install pressure sensors for real-time monitoring of pressure changes inside storage tanks. The sensors transmit pressure signals to the pressure stabilization system to promptly adjust the valve opening to maintain stable pressure within the tank.
Control Valve: Select an appropriate control valve for regulating the gas flow and pressure within the storage tank. The control valve should have excellent regulating performance and stability to ensure the pressure within the tank remains within the set range.
Safety Valve: Install a safety valve to automatically release gas when the pressure inside the storage tank exceeds the set value, preventing overpressure. The safety valve should be selected and installed according to the design pressure and capacity of the tank.
Voltage Stabilization System Control: Equipped with a suitable control system for monitoring and regulating the operation of the voltage stabilization system. The control system enables automatic adjustment and alarm functions to ensure stable and safe pressure within the storage tank.
Note that the design of the pressure stabilization should be based on specific engineering requirements and the operating conditions of the liquid argon storage tank, adhering to relevant local laws, regulations, and standards. When designing and installing the pressure stabilization system, it is recommended to consult with an engineer or a relevant institution for guidance to ensure the reliability and safety of the system.

Consider the following aspects to differentiate the quality of liquid nitrogen storage tanks:
Material: Liquid nitrogen storage tanks are commonly made of high-strength, corrosion-resistant materials such as stainless steel or aluminum alloy. These materials offer excellent corrosion resistance and mechanical strength, ensuring long-term stable operation of the tanks.
Sealability: The liquid nitrogen tank should have excellent sealing performance, effectively preventing any leakage of liquid nitrogen. The valves, pipe connections, and other parts of the tank should be designed reasonably to ensure reliable sealing.
Insulation: Liquid nitrogen tanks should possess excellent insulation properties to minimize evaporation losses. The insulation layer of the tank should use materials like polyethylene foam to reduce heat conduction and evaporation losses.
Safety: The liquid nitrogen tank should have excellent safety features, including equipped with safety valves, pressure gauges, and other safety equipment, as well as fire and explosion-proof functions. The design and manufacturing of the tank should comply with relevant safety standards and regulations.
Service Life: Liquid nitrogen tanks generally have a long service life, capable of withstanding long-term use and transportation. The manufacturer and reputation of the tank are also significant factors in assessing the service life.
Price and After-Sales Service: The price of liquid nitrogen tanks should be reasonable, and excellent after-sales service is provided. Choosing manufacturers or suppliers with a good reputation and reliable after-sales service ensures quality products and technical support.
Considering these factors, the quality of liquid nitrogen tanks can be discerned. When selecting a liquid nitrogen tank, it is recommended to choose one that meets the requirements based on actual needs and usage environment to ensure safe and reliable storage.
Zhongjie Special Equipment adheres to the great vision of "realizing employees' dreams, creating value for customers, and striving for the prosperity and strength of our motherland," and is dedicated to the development of the green energy equipment industry. We commit to society with high-quality, cost-effective products and services!