Shandong Zhongjie Special Equipment's main products include: fuel (gas) boilers, organic heat carrier boilers, biomass boilers, waste heat boilers, and other boiler products; vacuum insulation cryogenic pressure vessels such as LNG tanks, oxygen-nitrogen-argon tanks, and CO2 tanks; pressure vessel products such as denitrification engineering equipment, heat storage and energy storage equipment, and complete chemical equipment; central air conditioning and HVAC equipment such as ground (water) source heat pumps, air source units, water-cooled screw units, and air-cooled modular units. Planned products include large-scale energy centers, LNG transport vehicles, LNG tank containers, and other green energy equipment.
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 vent occasionally:
Pressure Control: During operation, the pressure inside the liquid oxygen tank fluctuates due to evaporation of the liquid oxygen and temperature changes. 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 Build-up: During oxygen filling or usage, external factors or operational errors may cause the pressure inside the liquid oxygen tank to exceed safe levels. To prevent overpressure build-up, timely venting is required to reduce the pressure within the tank.
Prevent Gas Accumulation: There may be some gas impurities, such as air and water vapor, in liquid oxygen storage tanks. 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 cleanliness and unobstructed flow within the tank.
Note that the degassing operation of liquid oxygen should be performed by authorized personnel and strictly adhere to the relevant operational procedures and safety measures. During the degassing process, precautions should be taken to prevent leaks of liquid oxygen and contact with it, ensuring the safety and reliability of the operation.

Maintaining and being aware of the precautions for liquid nitrogen tanks is crucial. Here are some key points:
Maintenance:
Regular Inspections: Conduct regular inspections of the liquid nitrogen tank's exterior, valves, pipes, and other components to ensure they are in perfect condition. Pay special attention to check for any leaks, corrosion, or other forms of damage.
Clean Storage Tanks: Regularly clean liquid nitrogen storage tanks to remove internal dirt and sediment. Use appropriate cleaning agents and tools, and follow cleaning procedures and safety operation guidelines.
Liquid Nitrogen Refill: Refill liquid nitrogen on a regular basis as needed. Ensure the storage tank maintains an adequate supply of liquid nitrogen to meet usage requirements.
Maintain Pressure: Regularly inspect the liquid nitrogen tank's pressure to ensure it stays within the safe range. Perform pressure tests and adjustments as necessary.
Corrosion Protection: Depending on the material of the tank and its operating environment, appropriate corrosion protection measures are taken to extend the service life of the tank. For instance, applying corrosion-resistant coatings and conducting regular corrosion treatments.
Cautionary Notes:
Safe Operation: When using liquid nitrogen tanks, strict adherence to safety operating procedures and standards is mandatory. Operators must be trained, familiar with the properties of liquid nitrogen and safety operation requirements, and knowledgeable about the tank equipment and operational processes.
Safety Precautions: When using liquid nitrogen tanks, necessary safety measures must be taken, such as wearing protective gloves and suits. Avoid direct contact with liquid nitrogen to prevent frostbite.
Leak Control: Regularly inspect the liquid nitrogen tanks for leaks and equip with leak detectors and alarm systems. In case of a leak, immediate measures should be taken to control the leak and carry out repairs.
Ventilation Requirements: Ensure adequate ventilation in enclosed spaces where liquid nitrogen tanks are in use.

When storing liquid nitrogen in low-temperature storage tanks, the following points should be noted:
Protective Gear: When operating low-temperature storage tanks, it is mandatory to wear appropriate protective gear, including protective gloves, suits, and non-slip shoes. This equipment helps shield the skin from the low temperatures of liquid nitrogen and other hazards.
Avoid direct contact: Liquid nitrogen is extremely cold and can cause frostbite. Therefore, avoid direct contact with liquid nitrogen, especially with the skin. Use tools or equipment for handling to prevent direct hand contact with liquid nitrogen.
Ventilation Requirements: In the operational area of low-temperature storage tanks, adequate ventilation must be maintained to expel gases produced by the evaporation of liquid nitrogen. Ensure air circulation to avoid excessive oxygen concentration, and reduce the risk of fire and explosion.
Prevent Leaks: Regularly inspect low-temperature storage tanks for leaks, equip with leak detection and alarm systems. In case of a leak, take immediate action to control and repair it. Avoid hazards to personnel and the environment caused by liquid nitrogen leaks.
Fire Prevention Measures: Liquid nitrogen has a low boiling and freezing point, which can easily cause fires. Measures such as setting up fire barriers around low-temperature storage tanks and using fire-resistant coatings are taken to prevent fires from occurring and spreading.
Electrostatic Protection: Electrostatic buildup in low-temperature storage tanks may cause sparks, increasing the risk of fire. Measures should be

A liquid oxygen tank is a device used for storing liquid oxygen. Liquid oxygen is the liquid form obtained by cooling oxygen below its boiling point and is commonly used in fields such as medical, industrial production, and equipment. Liquid oxygen tanks are typically made from high-strength materials like stainless steel to ensure they can withstand the low temperatures and high pressures of liquid oxygen. The interior of the tank usually features an insulating layer to minimize evaporation of the liquid oxygen and maintain its低温 state. The design and manufacturing of liquid oxygen tanks must consider safety and reliability to prevent leaks and explosions. When using a liquid oxygen tank, strict operational procedures and safety standards must be followed to ensure the safety of personnel and equipment. The development and manufacturing of liquid oxygen tanks are carried out by engineers and technical teams, involving knowledge and technology from various fields such as materials science, mechanical engineering, and chemical engineering. Different manufacturers may employ different design and manufacturing methods to meet the needs and application scenarios of various users.
Our company highly values technological innovation and research and development design, boasting 1 municipal-level enterprise technology center in Heze City. We have established test 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. The key products we have developed, such as temperature and pressure vessel welding, biomass boiler emission reduction, and waste heat recovery, have successively been selected for multiple Shandong Province Department of Industry and Information Technology science and technology projects, key provincial projects, and Heze City innovative and excellent projects. We have accumulated 27 authorized utility models, 16 authorized inventions, 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 jointly developed deep cryogenic container processing technology using the international plasma arc + wire filling tungsten inert gas arc welding (PAW-GTAW) technique, which has been appraised as an internationally competitive level of technology in the deep cryogenic container manufacturing field by the provincial science and technology achievements. Choose Zhongjie Special Equipment, let's join hands to create brilliance!