Shandong Zhongjie Special Equipment (formerly Heze Boiler Factory Co., Ltd.) holds an A-grade boiler manufacturing license, an A2-grade pressure vessel manufacturing license, an A2-grade pressure vessel design license, a B-grade boiler installation license, and GB2/GB3-grade pressure pipeline installation licenses, as well as an equipment and machinery installation contracting qualification. It is a member of the China Boiler and Water Treatment Association, the China Chemical Equipment Association, and the Standing Committee of the Shandong Equipment Manufacturing Association. The company has also passed the ISO9001 Quality Management System, ISO14001 Environmental Management System, OHSAS18001 Occupational Health and Safety Management System certifications, and the American ASME/U2 certification.
To prevent dangers associated with liquid oxygen tanks, the following preventive measures can be taken:
Safety Operation and Management: Establish and enforce stringent safety operation and management systems, including proper use of storage tanks, operational procedures, and safety training. Ensure operators have the necessary safety awareness and skills, adhere to operational procedures, and minimize the likelihood of operational errors and accidents.
Regular inspections and maintenance: Conduct regular checks and maintenance on liquid oxygen tanks, including visual inspections, pressure tests, and leak detection. Identify and address tank issues promptly to ensure safety and reliability.
Safety devices and protective equipment: Tanks should be equipped with necessary safety devices such as pressure relief valves and level alarms, as well as protective equipment like fire barriers and explosion-proof devices. These devices and equipment can take timely measures in abnormal situations to ensure the safety of the tank.
Fire Prevention Measures: Liquid oxygen contains a high oxygen content, which is prone to causing fires. Therefore, fire prevention measures such as firewalls and fire extinguishers should be set up around the storage tank to prevent the spread and expansion of fires.
Leakage Control and Emergency Response Plan: Establish a leakage control and emergency response plan for liquid oxygen storage tanks, including leakage control measures, emergency response procedures, and evacuation plans for personnel. In the event of a leakage incident, the plan enables rapid action to control the leakage and ensure personnel safety.
Training and Awareness Enhancement: Conduct regular safety training for personnel using liquid oxygen tanks to enhance their safety awareness and emergency response capabilities. Strengthen safety

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 gloves, protective clothing, and non-slip shoes. This equipment safeguards 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, it is essential to 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 is mandatory to expel gases produced by the evaporation of liquid nitrogen. Maintain air circulation to avoid excessive oxygen concentration and reduce the risk of fire and explosion.
Prevent Leaks: Regularly inspect the low-temperature storage tanks for leaks and equip them with leak detection and alarm systems. In case of a leak, take immediate measures to control and repair it. Avoid leaks of liquid nitrogen to prevent harm to personnel and the environment.
Fire Prevention Measures: Liquid nitrogen has a low boiling and freezing point, which can easily cause fires. To prevent and contain fires, fire walls and fire-resistant coatings are set up around low-temperature storage tanks.
Electrostatic Protection: Electrostatic buildup in low-temperature storage tanks may cause sparks, increasing the risk of fire. Measures should be

Safe operation and transportation of liquid oxygen storage tanks should be mindful of the following points:
Safety Usage Instructions:
Tank Selection: Choose liquid oxygen tanks that comply with specifications and standards, ensuring their quality and safety performance.
Tank Installation: Tanks should be installed on a solid foundation to ensure stability. Additionally, good ventilation should be maintained around the tanks, and they should be kept away from flammable materials and heat sources.
Seal Integrity Inspection: Regularly check the tank's sealing performance to ensure there are no leakage at valve and pipe connections.
Pressure Control: Tanks should be equipped with pressure gauges and safety valves, with regular inspections and maintenance to ensure pressure remains within safe limits.
Fire Prevention Measures: Liquid oxygen contains a high concentration of oxygen, which is prone to cause fires. Establish firewalls around the storage tanks, ban smoking and open flames, and ensure safety.
Electrostatic Protection: During the transportation and use of liquid oxygen, static electricity can cause sparks, increasing the risk of fire. Measures such as using electroconductive materials and anti-static equipment are taken to reduce the accumulation and release of static electricity.
Shipping Precautions:
Transportation Tool Selection: Choose a vehicle that meets the transportation requirements for liquid oxygen, ensuring its safety and sealing.
Loading and Unloading: During the transportation of liquid oxygen, the following loading and unloading procedures should be adopted:

Prior to cooling the liquid oxygen tank, the following prerequisites must be met:
Clean Tanks: Ensure the interior of the tank is clean, free of impurities and contaminants. The tank should be properly cleaned and flushed to maintain its internal cleanliness.
Drainage and Exhaust: Empty the gas from the tank and expel it through the exhaust system to reduce the gas content inside the tank. This helps minimize the interference of gas on the cooling process.
Safety Precautions: Prior to cooling the liquid oxygen tank, necessary safety precautions must be taken. Liquid oxygen is highly flammable and has low-temperature characteristics. Operators should wear appropriate protective clothing, gloves, and other personal protective equipment to ensure safe operation.
Temperature Control: During the cooling process of the liquid oxygen tank, it is necessary to control the temperature of the tank. Typically, low-temperature mediums such as liquid nitrogen are used to cool the tank, ensuring that the tank's temperature gradually decreases below the boiling point of liquid oxygen.
Insulation and Heat Retention: Liquid oxygen tanks are typically designed with double or multi-layer structures, filled with insulating material in between to minimize heat transfer and evaporation of the liquid oxygen. Ensuring the integrity and excellent insulation of the insulation layer enhances the cooling efficiency of the tank.
Under the aforementioned prerequisites, cooling operations of the liquid oxygen storage tank can be conducted. The cooling process must strictly adhere to relevant safety regulations and operational guidelines to ensure the safe operation and use of the tank.
Chongjie 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 offer society products and services with high cost-performance!