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 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. The main workshop spans 83,000 square meters. There are currently 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 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.
To ensure the quality of liquid oxygen storage tanks, the following measures can be taken:
选择可靠的供应商：选择有资质和经验的储罐制造商或供应商，确保其具备良好的声誉和可靠的质量管理体系。
Adhere strictly to relevant standards and regulations: The design, manufacture, and installation of liquid oxygen storage tanks should comply with applicable standards and regulations, such as standards, industry-specific standards, or.
Quality Control and Inspection: Rigorous quality control and inspections are conducted throughout the manufacturing process, including material inspection, process monitoring, and finished product testing. Ensuring that the materials, welding, and sealing of the tanks meet the required standards.
Comprehensive Quality Management System: Establish and implement a comprehensive quality management system, including quality control plans, quality inspection records, and quality training, to ensure each stage meets quality requirements.
Regular maintenance and inspection: Conduct regular maintenance and inspections on liquid oxygen tanks, including cleaning, coating protection, and corrosion prevention, to extend the tank's service life and maintain its optimal operational condition.
Safety Operations and Management: Establish and implement safety operations and management systems, including proper use of storage tanks, operational procedures, safety training, etc., to ensure the safety and reliability of the tanks during use.
Routine Inspections and Assessments: Regularly inspect and assess the liquid oxygen storage tanks, including visual checks, pressure tests, leak detection, and as required, non-destructive testing and material analysis, to ensure the tank's quality and safety.
By implementing these measures, the quality, reliability, and safety of the liquid oxygen storage tanks can be effectively ensured, meeting usage requirements and standards.

The cooling process and precautions for liquid argon cylinders are as follows:
Cooling Process Analysis:
Clean the cylinder: Prior to cooling the liquid argon cylinder, ensure the interior is clean and free of impurities and contaminants. Use an appropriate cleaner for cleaning and rinse thoroughly.
De-airing 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 can rapidly cool the air and walls inside the tank, thereby lowering the tank's temperature.
Waiting for cooling: Liquid nitrogen will gradually lower the temperature inside the tank through heat conduction until it reaches the required low temperature.
Cautionary Notes:
Safety Protection: During the cooling process of liquid argon cylinders, it is essential to implement necessary safety measures. Liquid argon has low temperatures and high flammability, so operators must wear protective suits, gloves, and other personal protective equipment to ensure safe handling.
Fire Prevention Measures: Liquid argon is highly flammable; hence, 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, it is necessary to control the temperature of the cylinder to avoid overcooling or insufficient cooling. Temperature sensors and a temperature control system can be used to monitor and control the cylinder's temperature.
Insulation and Heat Retention: Liquid argon cylinders are typically designed with double or multi-layer structures, filled with insulating material in the middle to minimize heat transfer and evaporation of the liquid argon. Ensure the integrity and excellent insulating properties of the insulation layer.

The safe placement of liquid oxygen tanks is a crucial measure to ensure that the tanks do not pose a danger to the surrounding environment and personnel during use. The following are the safety requirements for the placement of liquid oxygen tanks:
Safety Distance: Liquid oxygen storage tanks should maintain a certain distance from other buildings and equipment. This is to ensure effective control and minimize the impact on the surrounding environment in the event of a tank leak or fire.
Fire and Explosion Prevention Measures: Liquid oxygen tanks should be placed in a fire-resistant area, away from open flames, high-temperature sources, and flammable materials. The surrounding area should be equipped with fire and explosion prevention facilities, such as fire extinguishers and foam sprinkler systems, to address potential fire risks.
Level placement: The liquid oxygen tank should be placed on a solid, flat foundation to ensure stability. The bottom of the tank should make full contact with the ground to avoid the tank from tilting or rocking.
Ventilation Requirements: Liquid oxygen tanks should be placed in well-ventilated areas to ensure normal circulation of gas emissions and oxygen supply. There should be no obstructions around the tanks that hinder gas flow.
Identification and Warning: Oxygen liquid storage tanks should be clearly marked with information such as the stored medium, capacity, and pressure. Warning signs and safety cautionary labels should be placed in the surrounding area to alert personnel to the presence and potential hazards of the oxygen liquid storage tank.
Regular inspections and maintenance: Liquid oxygen tanks should be regularly inspected and maintained, including checking the tank's appearance, sealing, and corrosion prevention measures. Any issues found should be promptly repaired or the tank replaced to ensure proper operation and safety.
Be mindful that the safety requirements for the placement of liquid oxygen tanks may vary by region and industry. When positioning liquid oxygen tanks, adhere to relevant regulations, standards, and safety procedures, and establish appropriate safety measures based on the specific situation. If unfamiliar with or have doubts about the safety placement requirements, it's advisable to consult experts or relevant organizations for guidance.

Operation and protection procedures for the application of low-temperature liquid nitrogen storage tanks should include the following:
Staff Training: All operators must undergo safety training for liquid nitrogen storage tanks, familiarize themselves with the properties, hazards, and proper operating procedures, as well as emergency response measures.
Protective Gear: Operators must wear appropriate protective gear, including gloves, protective clothing, and non-slip shoes, to safeguard themselves from the low temperatures of liquid nitrogen and other hazards.
Ventilation Requirements: Adequate ventilation must be ensured in the operational area of the liquid nitrogen storage tank to expel gases produced by the evaporation of liquid nitrogen. Avoid excessive oxygen concentration to minimize the risk of fire and explosion.
Leakage Control: Tanks must be equipped with leak detection and alarm systems to promptly identify and control the leakage of liquid nitrogen. In the event of a leak, immediate action should be taken to contain the source of the leak and to conduct repairs.
Fire Prevention Measures: Nitrogen liquid has a low boiling and freezing point, which is prone to causing fires. Measures such as setting up firewalls around nitrogen liquid storage tanks and using fire-retardant coatings are taken to prevent fires from occurring and spreading.
Static Dissipation: The accumulation of static electricity in liquid nitrogen tanks may 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.
Regular inspections and maintenance: Conduct regular checks on the condition of liquid nitrogen tanks and related equipment, including valves, pipes, pressure gauges, etc. Ensure the equipment is in perfect condition without any damage, and promptly repair or replace any damaged parts.
Waste Gas Treatment: Liquid nitrogen tanks produce waste gas during use, which requires appropriate waste gas treatment measures to prevent potential harm to the environment and human health.
Emergency Response Plan: Develop an emergency response plan for liquid nitrogen tanks, including procedures for handling leaks, emergency rescue measures, and protocols for notifying relevant departments. Operators
Zhong Jie Special Equipment upholds 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-value products and services!