Shandong Zhongjie Special Equipment Co., Ltd. (formerly Heze Boiler Factory Co., Ltd.) was established in 2001, located at No. 2218 Jinnan Road, Development Zone, Heze City, with a registered capital of 50 million yuan and total assets of 500 million yuan. The company has 7 business centers: boilers, deep-freezing containers, pressure vessels, central air conditioning, engineering installation, international trade, and Internet of Things. It has three factory sites on Jinnan Road, East Changjiang Road, and Bohai Road, covering a total of 200,000 square meters, with the main workshop spanning 83,000 square meters. It currently employs 710 people, including 247 engineers and technicians, and 82 intermediate-level technicians. In December 2016, it was recognized as a "High-tech Enterprise" by the Science and Technology Department. In June 2021, it was identified as a "Specialized and New Enterprise in Shandong Province" by the Ministry of Industry and Information Technology. In June 2022, it was recognized as a "Gazelle Enterprise in Shandong Province" and in August 2022, it was identified as a "Specialized and New Small Giant Enterprise" by the Ministry of Industry and Information Technology.
The use and operation of the liquid oxygen storage tank system require attention to the following points:
Safe Operation: When operating the liquid oxygen storage tank system, it is mandatory to follow relevant safety operating procedures and standards to ensure the safety of the operators.
Tank Selection: Choose liquid oxygen tanks that comply with regulations 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.
Seal Integrity Inspection: Regularly inspect the sealing performance of the storage tank system to ensure there are no leakage issues at valve and pipeline connections.
Pressure Control: The storage tank system should be equipped with a pressure gauge and a safety valve, with regular inspections and maintenance to ensure pressure remains within safe limits.
Fire Safety Measures: Liquid oxygen contains a high oxygen content and is prone to cause fires. Install fire walls around the storage tank system, ban smoking and open flames, to 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 are taken to reduce the accumulation and release of static electricity.
Regular Inspections and Maintenance: Conduct regular checks on the tank system and related equipment, including valves, pipes, pressure gauges, etc. Ensure that the equipment is in perfect 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 precautions to be taken when using the liquid oxygen storage tank system, ensuring safe operation and the normal functioning of the system. During operation, strictly adhere to the relevant operational procedures and safety requirements to prevent accidents.

To extend the service life of liquid argon storage tanks, the following measures can be taken:
Regular inspections and maintenance: Conduct periodic visual inspections of liquid argon tanks, check valves and connections, and perform leak detection and pressure tests. Promptly identify and repair potential issues to ensure the normal operation of the tank.
Maintain Insulation Layer: The insulation layer is crucial for the thermal preservation of liquid argon tanks. Regularly inspect the integrity and insulating performance of the insulation layer, repair or replace any damaged insulation materials to ensure the tank's insulating effectiveness.
Regulate Liquid Argon Temperature: Maintain the liquid argon within an appropriate temperature range to prevent damage to the storage tank from excessive or low temperatures. Implement suitable cooling or heating measures to ensure stable liquid argon temperature.
Corrosion Protection: The shell and internal structure of the liquid argon tank should be protected against corrosion and oxidation. Regularly inspect and maintain the protective coating to ensure it remains intact.
Avoid excessive pressure and overfilling: Prevent the internal pressure of the tank from being too high or too low, as well as overfilling with liquid argon. Excessive pressure and overfilling can lead to structural破裂 or damage to the tank.
Regular cleaning and drainage: Regularly clean the interior of the tank to remove accumulated impurities and dirt. Regularly drain to prevent杂质 and sediments in liquid argon from damaging the tank.
Safety Operation and Training: Ensure operators are knowledgeable and skilled in the safe operation of liquid argon tanks. Enhance safety training to boost operators' safety awareness and emergency response capabilities.
Manage records and documents: Establish comprehensive management records and documents, including the usage of tanks, inspection records, and maintenance records. Regularly review and update the management records to ensure the safe management and maintenance of the tanks.
These measures can help extend the service life of liquid argon storage tanks, but specific operations and management are required based on the type and application of the tank. When performing maintenance and operation, please follow relevant regulations and standards, and consult experts to ensure safety and effectiveness.

Prior to using the liquid oxygen tank, the following preparations must be made:
Safety Inspections: Ensure the tank and its surrounding environment are safe. Check for any damage, leaks, or other potential hazards on the tank. Confirm that there are no flammable materials or other dangerous items around the tank.
Tank Preparation: Inspect the tank's exterior, including the shell, welds, valves, and fittings. Ensure there are no visible damages or corrosion. Check that the insulation layer is intact and undamaged.
Liquid Oxygen Filling: Utilize liquid oxygen transfer equipment to fill liquid oxygen into the storage tank. Ensure that the flow rate and pressure of liquid oxygen are maintained within safe limits during the filling process.
Pressure Control: Storage tanks should be equipped with pressure control devices to ensure internal pressure is within a safe range. Inspect and adjust the pressure control devices to ensure proper operation.
Valve Operation: Check that the valves and fittings on the tank are functioning properly. Ensure the valves open and close smoothly and reliably. Adjust the opening and closing status of the valves as needed.
Safety Equipment: Inspect the safety equipment around the storage tank, such as fire separation zones and alarm systems, to ensure they are functioning properly.
Operator Training: Ensure operators are proficient in the safe operation of liquid oxygen storage tanks.

The cooling process and precautions for liquid argon cylinders are as follows:
Cooling Process Analysis:
Clean the tank: Prior to cooling the liquid argon tank, ensure the interior is clean and free of impurities and contaminants. Use an appropriate cleaning agent for washing and rinse thoroughly.
Drainage and Exhaust: Empty the gas inside the drum and expel it through the exhaust system to reduce the gas content within the drum.
Add Liquid Nitrogen: Inject liquid nitrogen into the tank, which will rapidly cool the air and walls inside the tank due to its low temperature, thereby lowering the tank's temperature.
Wait for Cooling: Liquid nitrogen will gradually lower the temperature inside the tank through the process of heat conduction until it reaches the required low temperature.
Cautionary Notes:
Safety Protection: Necessary safety precautions must be taken during the cooling process of the liquid argon cylinder. Liquid argon has low temperatures and high flammability, so operators should wear protective suits, gloves, and other personal protective equipment to ensure safe operation.
Fire Prevention Measures: Liquid argon is highly flammable; therefore, during the cooling process of the liquid argon tank, it is essential to ensure there are no ignition sources in the surrounding environment and to have appropriate fire extinguishing equipment on hand.
Temperature Control: During the cooling process of the liquid argon cylinder, the temperature of the cylinder must be controlled to avoid overcooling or insufficient cooling. Temperature sensors and temperature control systems can be used to monitor and control the cylinder's temperature.
Insulation and Heat Retention: Liquid argon tanks are typically designed with double or multi-layer structures, filled with insulating material in the middle to reduce heat transfer and evaporation of liquid argon. Ensure the integrity and good insulating properties of the insulation layer.
Our company places great emphasis on technological innovation and R&D, boasting one city-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 various 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 emissions reduction, and waste heat utilization has been selected for multiple Shandong Provincial Department of Industry and Information Technology science and technology projects, Shandong key projects, and Heze City innovative and excellent projects. We have accumulated 27 authorized utility model patents, 16 authorized invention patents, participated in drafting 2 standards, 2 industry standards, and registered 15 trademarks. Our technical team, in collaboration with Professor Li Yajiang of Shandong University, has developed deep cryogenic container processing technology using the international plasma arc + wire filling tungsten inert gas arc welding (PAW-GTAW) technology, which 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!