Shandong Zhongjie Special Equipment (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 seven business centers: boiler, deep-freezing containers, pressure vessels, central air conditioning, engineering installation, international trade, and Internet of Things. It operates three factory sites on Jinnan Road, East Yangtze Road, and Bohai Road, covering a total area of 200,000 square meters, with the main workshop spanning 83,000 square meters. Currently, there are 710 employees, including 247 engineers and technicians and 82 intermediate-level technical personnel. In December 2016, it was recognized as a "High-Tech Enterprise" by the Science and Technology Department. In June 2021, it was named a "Specialized and New Enterprise of Shandong Province" by the Ministry of Industry and Information Technology. In June 2022, it was identified as a "Gazelle Enterprise of Shandong Province" and in August 2022, it was recognized as a "Specialized and New Small Giant Enterprise" by the Ministry of Industry and Information Technology.
The oxygen-filling process for liquid oxygen tanks must adhere to specific operational procedures and safety measures. Here are the steps for filling liquid oxygen tanks:
Preparation: Ensure the tank and oxygen-filling equipment are in good working order, check the tank's sealing and the normal operation of the safety valve.
Connect equipment: Link the aeration equipment to the storage tank, ensuring the connection is sealed reliably.
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 prevent 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 storage tank into the storage tank. During the filling process, control the filling speed and pressure to prevent excessive pressure and temperature increase in the storage tank.
Monitoring and Control: During the aeration process, it is necessary to monitor the tank's pressure and temperature to ensure they remain within safe limits. In the event of any anomalies, aeration should be immediately stopped and appropriate actions taken.
Oxygen Filling Completed: Close the valve of the oxygen filling equipment and stop the oxygen filling process when the tank reaches the required oxygen content or pressure.
Safety Handling: After the 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 safe operation of low-temperature liquid storage tanks primarily involves the following key aspects:
Tank Design and Material Selection: The tank design must comply with relevant safety standards and regulations, capable of withstanding the pressure and temperature of low-temperature liquids. Select appropriate materials, such as stainless steel and aluminum alloys, to ensure the tank's corrosion resistance and low-temperature performance.
Insulation and protective measures: Low-temperature liquid storage tanks should be equipped with an effective insulation layer to minimize heat transfer and liquid evaporation. The selection and installation of the insulation layer should comply with relevant standards and requirements. In addition, protective measures such as anti-freezing and anti-explosion measures should be implemented to ensure the safe operation of the tank.
Pressure Control and Safety Valves: Low-temperature liquid storage tanks should be equipped with reliable pressure control systems and safety valves to ensure the pressure inside the tank remains within a safe range. The pressure control system should be capable of promptly detecting and adjusting the pressure inside the tank, preventing safety risks from excessive or insufficient pressure.
Leak and Fire Protection: Low-temperature liquids are highly flammable, so measures should be taken to prevent leaks and fires. Tanks and related pipelines must have good sealing properties and should be regularly inspected and maintained to prevent leaks. Additionally, appropriate fire protection equipment and fire extinguishing materials should be provided to address fire risks.
Safety Operation and Training: Operators must undergo relevant safety training, familiarize themselves with the safe operation procedures for low-temperature liquid storage tanks and emergency response measures. Adhere to correct operational steps to ensure safe operation.
Regular inspections and

To extend the service life of liquid argon storage tanks, the following measures can be taken:
Regular inspections and maintenance: Conduct regular visual inspections of liquid argon tanks, checks on valves and fittings, as well as leak detection and pressure tests. Identify and repair potential issues promptly to ensure the normal operation of the tank.
Maintain the insulation layer: The insulation is crucial for the thermal retention of liquid argon tanks. Regularly inspect the integrity and insulating properties of the insulation, repair or replace any damaged insulation materials to ensure the tank's thermal retention effectiveness.
Control Liquid Argon Temperature: The temperature of liquid argon should be maintained within an appropriate range to prevent damage to the storage tank due to excessive or insufficient temperatures. Implement suitable cooling or heating measures to ensure stable liquid argon temperature.
Corrosion Protection: The outer shell and internal structure of the liquid argon tank should be protected against corrosion and oxidation. Regular inspections and maintenance of the protective coating are required to ensure its integrity.
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 waste removal: Regularly clean the interior of the tank to remove accumulated impurities and dirt. Regularly remove waste to prevent contaminants and sediments in liquid argon from damaging the tank.
Safety Operations and Training: Ensure operators are equipped with the knowledge and skills for safe handling of liquid argon tanks. Strengthen safety training to enhance operators' safety awareness and emergency response capabilities.
Establish comprehensive management records and documents, including tank usage, inspection, and maintenance records. Regularly review and update these records to ensure 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 should be tailored to the type and application of the tank. When performing maintenance and operation, please adhere to relevant regulations and standards, and consult with experts to ensure safety and effectiveness.

Maintenance and protection of liquid argon cylinder accessories are crucial for ensuring the normal operation and extending the service life of the cylinder. The following are general methods for maintaining and protecting liquid argon cylinder accessories:
Valve Maintenance: Regularly inspect and maintain valves within the tank accessories, including intake valves, exhaust valves, and safety valves. Ensure valves operate smoothly and reliably with no leaks or jamming. Regularly lubricate the valves and clean any debris and dirt.
Pressure Relief Device Maintenance: The pressure relief devices (such as safety valves) within the liquid argon storage tank accessories are critical components for ensuring the internal pressure safety of the tank. Regularly inspect and test the operational status of the pressure relief devices to ensure proper functioning. Clean and repair as necessary.
Sensor and Instrument Maintenance: Sensors and instruments in the liquid argon storage tank accessories are used to monitor and control parameters such as the tank's temperature and pressure. Regularly calibrate and inspect the accuracy and reliability of the sensors and instruments. Keep the sensors and instruments clean and in proper working order.
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 Corrosion Protection: Regularly clean the accessories of the tank, removing impurities and dirt from the surface. Periodically inspect and maintain the corrosion-resistant coating on the accessories to prevent corrosion and oxidation.
Regular Inspections and Maintenance: Conduct comprehensive inspections and maintenance of the liquid argon cylinder accessories on a regular basis, including appearance, fittings, 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 the maintenance date, services performed, issues found, and corrective actions. Establish comprehensive management records and documentation to facilitate tracking and managing the operational status of attachments.
Please note that maintenance and protection of liquid argon tank accessories should be carried out by trained personnel, adhering to relevant specifications and standards. Ensure safety during maintenance and operation, and consult experts for accurate guidance.
Our company attaches great importance to 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, etc. We have 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. The key products and technologies we have developed, such as welding for temperature and pressure vessels, biomass boiler emission reduction, and waste heat utilization, have successively been selected for multiple Shandong Provincial Department of Industry and Information Technology science and technology innovation projects, Shandong Provincial key projects, and Heze City innovation and excellence projects. We have accumulated a total of 27 authorized utility model patents, 16 authorized invention patents, participated in drafting 2 standards, 2 industry standards, and registered 15 trademarks. The technical team of our company, in collaboration with Professor Yajiang Li of Shandong University, has developed deep cryogenic container processing technology using the international plasma arc + wire filling argon arc welding (PAW-GTAW) technology. After being appraised as a provincial-level scientific and technological achievement, our technology level has reached an international standard in the field of deep cryogenic container manufacturing. Choose Zhongjie Special Equipment, and let's create brilliance together!