Shandong Zhongjie Special Equipment specializes in: fuel (gas) boilers, organic heat carrier boilers, biomass boilers, waste heat recovery boilers, and other boiler products; vacuum insulated cryogenic pressure vessels such as LNG tanks, oxygen/nitrogen/argon tanks, and CO2 tanks; pressure vessel products including denitrification engineering equipment, heat storage and energy storage equipment, and complete chemical equipment; central air conditioning and ventilation 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.
Maintaining and caring for liquid nitrogen tanks is crucial for ensuring their safe operation and extending their lifespan. Here are the maintenance and care methods for liquid nitrogen tanks:
Regular Inspections: Conduct regular inspections of the liquid nitrogen tank's exterior and interior, checking for leaks, corrosion, wear, or other damage. Pay special attention to the tank's interfaces, valves, and pipelines, ensuring they are functioning properly.
Cleaning and Defrosting: Regularly clean the exterior surface of the liquid nitrogen tank to remove dust and grime. If there is ice or frost inside the tank, defrosting is required to maintain the tank's normal operation.
Level Monitoring: Regularly monitor the liquid nitrogen tank's level to ensure the stored quantity of liquid nitrogen remains within a safe range. In case of an abnormal level, adjustments or replenishment of liquid nitrogen are required promptly.
Inspection and Replacement of Parts: Regularly inspect and replace critical components of liquid nitrogen storage tanks, such as safety valves, pressure sensors, and temperature sensors. Ensure the normal operation and accuracy of these components.
Inspect the Insulation Layer: Regularly check the liquid nitrogen tank's insulation layer to ensure its integrity and insulating properties. If damage or aging of the insulation is found, it must be repaired or replaced promptly.
Regular Calibration: Regularly calibrate the gauges and sensors of liquid nitrogen tanks to ensure their accuracy and reliability. Calibration should be conducted according to relevant standards and specifications.
Safety Training and Operating Procedures: Conduct regular safety training for liquid nitrogen storage tanks to ensure operators are familiar with the safe operating procedures and emergency response measures.
Note that maintenance and care of liquid nitrogen tanks should be performed by trained and authorized personnel. Adhere to relevant safety regulations and operational guidelines to ensure the safety and effectiveness of maintenance work.

Proper management regulations for the use of low-temperature liquid storage tanks encompass the following aspects:
Tank Selection and Installation: Choose an appropriate low-temperature liquid storage tank and ensure it complies with relevant standards and regulations. Installation of the tank should be carried out by personnel and operated in accordance with the manufacturer's instructions and requirements to ensure stability and safety.
Safety Operating Procedures: Establish and implement safety operating procedures for liquid storage tanks, including startup, shutdown, filling, and venting procedures. Operators must receive training to understand the characteristics of liquid storage tanks, safety precautions, and emergency response measures.
Safety Equipment and Protection Measures: Tanks should be equipped with necessary safety devices such as pressure sensors, safety valves, and leak detectors to monitor and control the pressure and temperature of the tank. At the same time, operators should wear appropriate personal protective equipment, such as insulated gloves and protective suits, to ensure their own safety.
Regular Inspections and Maintenance: Conduct regular inspections and maintenance of low-temperature liquid storage tanks, including checking the tank's appearance, seals, and corrosion protection. In case of any issues, promptly repair or replace the tank to ensure its proper operation and safety.
Waste Management: Abandoned low-temperature liquid storage tanks should be disposed of in accordance with relevant environmental protection regulations. The residual liquids in the abandoned tanks should be handled properly to prevent environmental pollution.
Tank Records and Tracking: Establish tank usage records, including filling dates, quantities, and usage status. Additionally, it is recommended to set up a tank tracking system for monitoring and managing tank usage and maintenance.
Here are some common management regulations for low-temperature liquid storage tanks, with specific regulations potentially varying by industry and region. When using low-temperature liquid storage tanks, it is essential to comply with relevant laws and standards and to establish appropriate management measures based on actual circumstances.

During the process of constructing low-temperature liquid oxygen storage tanks with central oxygen supply, it is essential to pay special attention to the following aspects:
Safe Operation: Adhere strictly to safety operation procedures and standards during the storage tank installation process. Operators must be trained to understand the properties and safety requirements of liquid oxygen, be familiar with the equipment and operational procedures, ensuring the safety of the operation.
Fire Prevention Measures: Liquid oxygen contains a high oxygen content, which is prone to causing fires. During the installation process, necessary fire prevention measures should be taken, such as setting up fire barriers, using fire-resistant coatings, and prohibiting open flames, to prevent the occurrence and spread of fires.
Leak Control: Pay attention to leak control during the installation process. Oxygen leakage can increase oxygen concentration, raising the risk of fire and explosion. Leak detectors and alarm systems should be equipped to promptly detect and control leaks, and appropriate emergency measures should be taken.
Oxygen Concentration Monitoring: During the installation process, the oxygen concentration around the liquid oxygen storage tank should be monitored regularly. High oxygen concentrations can intensify the combustion of flammable materials, increasing the risk of fire and explosion. Take timely measures to ensure the oxygen concentration remains within safe limits.
Grounding and Static Dissipation: During the liquid oxygen process, ensure proper grounding of the storage tank and related equipment to minimize static accumulation and discharge. Utilize static conductive materials and antistatic equipment to reduce the dangers caused by static.
Regular inspections and maintenance: After the installation is completed, regular inspections and maintenance should be conducted on the liquid oxygen storage tank. This includes visual inspections, pressure tests, leak detection, etc., to ensure the tank's safety and stability.
Note that during the installation of the central oxygen supply low-temperature liquid oxygen storage tank, operations should be performed by experienced personnel and in accordance with relevant safety operation procedures and standards. Throughout the installation process, safety risks should be closely monitored, and timely measures should be taken to ensure the safety and stability of the installation.

A water pressure test for liquid nitrogen storage tanks is a common testing method used to assess the tank's sealing integrity and pressure resistance. The general steps for a water pressure test on a liquid nitrogen storage tank are as follows:
Preparation: Ensure the tank interior is clean and the tank is empty of gases and liquids. Check the tank's sealing and safety devices for proper operation.
Fill water: Fill the tank with water to ensure the water level is above the low water mark. Pumps or other appropriate methods can be used for filling.
Apply Pressure: Gradually increase the water pressure using a pressure pump or other pressure source until the predetermined test pressure is reached. The test pressure is typically 1.1 times the design working pressure of the tank.
Pressure Maintenance: After reaching the test pressure, maintain it for a period of time (usually 30 minutes to 1 hour), and observe for any abnormal conditions such as leaks or deformation in the tank.
Pressure Relief: Gradually release pressure to drain water from the tank until the tank is completely empty.
Inspection and Evaluation: Check the tank's surface and interior for leaks, deformities, or other damage. Evaluate the test results to ensure the tank meets design specifications and safety standards.
需要注意的是，液氮储罐水压试验需要由人员进行操作，并遵循相关的安全操作规程。在进行测试前，应仔细阅读和遵守储罐制造商提供的操作指南和安全注意事项。
Our company highly values technological innovation and R&D design, boasting 1 city-level enterprise technology center in Heze City. We have established testing facilities for non-destructive testing, physical and chemical testing, welding testing, hydrostatic testing, and more. Equipped with over 600 instruments and equipment including CNC machines, X-ray flaw detectors, digital ultrasonic flaw detectors, mechanical property testing machines, chemical analyzers, spectrometers, tensile testing machines, plasma welding machines, and more, our R&D has focused on key products such as welding for temperature-pressure vessels, emission reduction for biomass boilers, and waste heat recovery. These technologies have been selected for multiple Shandong Provincial Department of Industry and Information Technology innovation projects, key provincial projects, and Heze City innovative excellence projects. We have累计 obtained 27 authorized utility model patents, 16 authorized invention patents, 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 developed deep cryogenic container processing technology using the internationally recognized plasma arc + wire-in-tube tungsten inert gas arc welding (PAW-GTAW) technique, which has been appraised as reaching international standards in deep cryogenic container manufacturing. Choose ZJ Special Equipment, let's create brilliance together!