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-freeze 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 reason for occasional venting of liquid oxygen tanks is primarily to maintain the safe pressure range within the tank and prevent excessive pressure buildup. The following are several scenarios where liquid oxygen tanks may be vented occasionally:
Pressure Control: During the operation of the liquid oxygen tank, due to the evaporation of liquid oxygen and temperature changes, the pressure inside the tank will vary. To maintain a safe pressure range within the tank, regular venting is required to control the tank's pressure within the safe limits.
Prevent Overpressure Accumulation: During oxygen filling or usage, external factors or operational errors may cause the pressure inside the liquid oxygen tank to exceed the safe limit. To prevent overpressure accumulation, timely venting is required to reduce the pressure within the tank.
Prevent Gas Accumulation: There may be some gas impurities in liquid oxygen storage tanks, such as air and water vapor. These gases can condense into liquids or solids at the low temperatures of liquid oxygen, blocking pipelines or affecting the normal operation of the tank. Regular venting can expel these impurities, maintaining the tank's cleanliness and unobstructed flow.
Note that the venting operation of liquid oxygen should be performed by authorized personnel and strictly adhere to the relevant operational procedures and safety measures. During the venting process, attention should be given to prevent leakage of liquid oxygen and contact with it, ensuring the safety and reliability of the operation.

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 connections, and leak detection and pressure tests, etc. Detect and repair potential issues promptly to ensure the normal operation of the tank.
Maintain Insulation: The insulation is crucial for the thermal preservation of liquid argon tanks. Regularly inspect the integrity and insulating properties of the insulation, repair or replace damaged insulation materials to ensure the tank's insulating effectiveness.
Control Liquid Argon Temperature: Maintain the liquid argon temperature within an appropriate 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 storage 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 over-filling: Prevent excessive internal pressure or low pressure within the tank, as well as over-filling with liquid argon. Excessive pressure and over-filling may lead to structural cracks or damage to the tank.
Regular cleaning and waste removal: Clean the interior of the tank regularly to remove accumulated impurities and dirt. Conduct regular waste removal to prevent杂质 and sediments in liquid argon from damaging the tank.
Safety Operation and Training: Ensure operators have knowledge and skills for safe operation of liquid argon tanks. Enhance safety training to improve 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 are required based on the type and application of the tank. When performing maintenance and operation, follow relevant regulations and standards, and consult experts to ensure safety and effectiveness.

To prevent the explosion of liquid oxygen tanks, the following measures can be taken:
Regular Inspections and Maintenance: Conduct regular inspections and maintenance of the liquid oxygen storage tank, including checking the tank's appearance, welds, valves, and fasteners, to ensure they are intact and undamaged. Regularly clean the tank to remove any contaminants and dirt adhered to the surface.
Pressure Control: Storage tanks should be equipped with pressure control devices to ensure internal pressure remains within a safe range. Regularly inspect and adjust the pressure control devices to ensure proper operation.
Temperature Control: Liquid oxygen tanks should be maintained within an appropriate temperature range to prevent excessive heat from causing pressure increase. Ensure the insulation layer of the tank is intact to minimize heat conduction and loss.
Fire Protection Measures: Liquid oxygen has a high oxygen content and flammability, hence strict fire protection measures are required. A fire separation zone should be established around the storage tank, and smoking and open flames are prohibited. Ensure the storage tank maintains a safe fire distance from other facilities.
Pressure relief devices and safety valves: Liquid oxygen storage tanks should be equipped with pressure relief devices and safety valves to prevent overpressure and sudden pressure increases. Regularly inspect and test the operational status of the pressure relief devices and safety valves to ensure their proper functioning.
Tank Operation Guidelines: Adhere strictly to the operational specifications and safety requirements for liquid oxygen tanks. Operators must be trained and familiar with the tank's characteristics and operation techniques. Avoid operational errors and violations.
Emergency Preparedness: Establish emergency response plans and conduct drills to address potential accidents. Train operators in emergency response capabilities to ensure timely and effective actions.

Liquid oxygen storage tanks are high-pressure, highly oxidizing equipment that requires special attention to safety during use. Here are some safety precautions for liquid oxygen storage tanks: Operation: The operation of liquid oxygen storage tanks should be performed by trained and experienced personnel. Operators should be familiar with the tank's structure, performance, and operational procedures, and should operate strictly according to the operation manual and safety regulations. Fire Prevention Measures: Liquid oxygen is highly oxidizing and can easily cause fires and explosions. Open flames and sparks should be prohibited around the storage tank, and contact with high-temperature objects should be prevented. Fire prevention facilities and fire-fighting equipment should be established, and regular inspections and maintenance should be conducted. Leakage Control: In the event of a leak in a liquid oxygen storage tank, immediate measures should be taken to control the leakage. A leakage can lead to the evaporation of liquid oxygen and an increase in oxygen concentration, which raises the risk of fire and explosion. A leakage alarm system should be established, and leakage control devices and personal protective equipment should be provided. Insulation Protection: Liquid oxygen storage tanks should have good insulation protection to reduce the evaporation of liquid oxygen and maintain a low temperature state. The insulation layer should be inspected and maintained regularly to ensure its integrity and insulating performance. Safety Distance: A certain safety distance should be maintained around the liquid oxygen storage tank to prevent the spread of fires, explosions, and leaks. The specific requirements for safety distance should be assessed and determined according to local regulations and standards. Regular Inspections and Maintenance: Liquid oxygen storage tanks should be inspected and maintained regularly, including checking the structural integrity of the tank, valves, and pipelines for tightness.
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