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 area 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.
Liquid argon storage tanks are equipment used for storing and transporting liquid argon, featuring the following characteristics:
Low-temperature retention performance: The liquid argon tank is equipped with special insulation materials and structural design, effectively maintaining the low-temperature state of liquid argon. The tank is internally lined with insulation to minimize heat transfer and loss, ensuring long-term storage of liquid argon.
High-sealing performance: The liquid argon storage tank boasts excellent sealing properties, effectively preventing any leakage or evaporation of liquid argon. The tank's valves, connectors, and seals, among other components, are precision-designed and manufactured to ensure reliable sealing performance.
High strength and corrosion resistance: The liquid argon tank is made of high-strength materials, capable of withstanding the high pressure and low temperature of liquid argon. Both the internal and external surfaces of the tank have been specially treated for excellent corrosion resistance, capable of resisting corrosion and oxidation from liquid argon.
Safety Performance: The liquid argon storage tank is equipped with multiple safety protection measures, including safety valves, pressure sensors, and level monitoring devices. These devices can monitor and control the tank's pressure, temperature, and level, ensuring the tank operates within a safe range.
Reliability and Stability: The liquid argon storage tank has undergone rigorous design, manufacturing, and testing, offering excellent reliability and stability. The tank is capable of long-term stable storage and transportation of liquid argon, ensuring that the quality and performance of the liquid argon remain unaffected.
Easy to operate and maintain: The liquid argon storage tank is relatively simple to operate and maintain, equipped with valves and fittings that are easy to use. The maintenance work primarily includes regular inspections, cleaning, and repairs, which can extend the lifespan of the tank.
The performance characteristics of liquid argon storage tanks make them essential for the storage and transportation of liquid argon, widely used in scientific research, industry, and other fields. When using liquid argon storage tanks, it is crucial to strictly adhere to the relevant operational specifications and safety requirements to ensure safe use.

The use of liquid oxygen storage tanks requires special attention to the following safety precautions:
Training: Operators of liquid oxygen tanks must undergo training to understand the properties of liquid oxygen, safety operating procedures, and emergency response measures. Only trained personnel are authorized to handle liquid oxygen tanks.
Safety Operating Procedures: Establish and adhere to the safety operating procedures for liquid oxygen tanks, including proper operational procedures, protective measures, and emergency response plans. Ensure operators follow the procedures to minimize accident risks.
Protective Measures: When using liquid oxygen tanks, it is essential to take necessary precautions, such as wearing protective gloves and suits. Avoid direct contact with liquid oxygen to prevent chilling.
Leakage Control: Regularly inspect the liquid oxygen storage tank for leaks and equip with leak detectors and alarm systems. In the event of a leak, take immediate action to control the leak and proceed with repairs.
Fire Prevention Measures: Liquid oxygen has a high oxygen content and is prone to causing fires. Measures such as setting up fire barriers around liquid oxygen storage tanks and using fire-retardant coatings are taken to prevent fires from occurring and spreading.
Static protection: Electrostatic buildup in liquid oxygen tanks can cause sparks, increasing the risk of fire. Measures such as using static-conductive materials and anti-static equipment should be taken to reduce the accumulation and release of static electricity.
Ventilation Requirements: Ensure adequate ventilation within the enclosed space of the liquid oxygen storage tank to expel vapors produced by the evaporation of liquid oxygen.

The 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 the accessories of liquid argon cylinders:
Valve Maintenance: Regularly inspect and maintain valves within tank accessories, including inlet valves, exhaust valves, and safety valves. Ensure valves operate smoothly and reliably, with no leaks or jamming. Regularly lubricate valves and remove 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 safety of internal tank pressure. Regularly inspect and test the operational status of the pressure relief devices to ensure they are functioning properly. Clean and repair as necessary.
Sensor and Gauge Maintenance: Sensors and gauges in liquid argon storage tank accessories are used for monitoring and controlling the tank's temperature, pressure, and other parameters. Regularly calibrate and check the accuracy and reliability of the sensors and gauges. Keep the sensors and gauges clean and operating normally.
Insulation Protection: The insulation layer of liquid argon storage tank accessories is crucial for maintaining the low temperature of liquid argon. Regularly inspect the integrity and insulating 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 surfaces. 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 on 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 result, including the service date, content, identified issues, and corrective measures. Establish comprehensive management records and documents for tracking and managing the operation of the attachments.
Please note that the maintenance and protection of liquid argon cylinder accessories should be carried out by trained personnel, in accordance with relevant specifications and standards. When performing maintenance and operation, ensure safety and consult with experts for accurate guidance.

The installation of the safety valve on liquid oxygen storage tanks is a crucial component to ensure timely pressure release in the event of overpressure, protecting the tank and related equipment. The following are the steps for installing the safety valve on liquid oxygen storage tanks:
Determine the rated pressure of the safety valve: Based on the design pressure and flow requirements of the liquid oxygen storage tank, select an appropriate safety valve. Ensure that the rated pressure of the safety valve meets the tank's specifications and complies with relevant safety standards and regulations.
Valve Installation Location Selection: Choose a suitable location for installing the safety valve. Typically, the safety valve should be mounted on the top or side of the liquid oxygen tank to ensure timely pressure release in the event of overpressure.
Prepare installation interfaces: Prepare the corresponding interfaces based on the connection method of the safety valve. This may include welding interfaces, threaded interfaces, or flange interfaces, etc. Ensure the tightness and firmness of the connections.
Install the safety valve: Mount the safety valve onto the prepared interface. Follow the installation instructions for the safety valve to ensure it is correctly connected and securely fastened.
Adjustment and Testing: After installation, adjust and test according to the requirements of the safety valve. Ensure the opening and closing pressures of the safety valve meet the design specifications, and conduct a leak test to ensure its sealing.
Connect emission pipes: The emission pipe of the safety valve should be properly connected to the outlet of the safety valve. The emission pipe should have sufficient diameter and flow capacity to ensure effective release of over-pressure gases when the safety valve opens.
Labeling and Documentation: Identify relevant information on safety valves and discharge pipes, such as rated pressure, flow rate, and installation date. Also, record the installation details and test results of the safety valves for future reference and maintenance.
When installing safety valves on liquid oxygen storage tanks, it is imperative to follow relevant safety regulations and operation guidelines. If lacking the necessary experience and knowledge, it is advisable to seek assistance and guidance from professionals to ensure the correct installation and reliable operation of the safety valves.
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