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.
Routine inspection of liquid nitrogen storage tanks refers to regular checks and maintenance to ensure their safe operation and efficient use. Here is a common introduction to the inspection of liquid nitrogen storage tanks:
Appearance Inspection: Regularly inspect the exterior of the storage tank, including the tank body, insulation layer, valves, and pipelines, etc. Note any cracks, corrosion, wear, or other damage. Also, check that the insulation layer is intact, without any damage or detachment.
Level Inspection: Regularly check the liquid nitrogen tank's level to ensure it remains within the normal range. This can be done using level gauges or level scales, among other equipment.
Pressure Check: Inspect the tank's pressure to ensure it's within the safe range. Pressure gauges or pressure sensors can be used for the check.
Leak Inspection: Check for signs of liquid nitrogen leakage around the storage tank, such as vapor mist, frosting, or freezing. If a leak is detected, take immediate action to repair it.
Valve and Pipe Inspection: Check that the valves and pipes of the tank are operating normally, without any gas leakage or blockages. Ensure the tightness and openness of the valves and pipes.
Safety Device Inspection: Examine the safety devices of the storage tank, such as pressure relief valves, temperature sensors, and level alarms, to ensure they are functioning properly.
Maintenance Records: Timely record the inspection results and maintenance records of the tank, including liquid level, pressure, insulation condition, leakage situations, etc. These records help monitor the tank's operational status and promptly identify issues.
It is important to note that the inspection of liquid nitrogen tanks should comply with relevant safety regulations and operational guidelines. Liquid nitrogen is extremely cold and highly flammable, so operators must wear appropriate personal protective equipment and ensure the operation environment is free of any ignition sources. Regular inspections help identify and address issues promptly, ensuring the safe and efficient operation of the tank.

Protection tips for liquid nitrogen tanks include the following:
Wear protective gear: When operating liquid nitrogen tanks, it is mandatory to wear appropriate protective gear, including gloves, protective suits, and non-slip shoes. This equipment can protect 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 skin. Use tools or utensils for handling to prevent direct hand contact with liquid nitrogen.
Note ventilation: Ensure adequate ventilation in the operational area of the liquid nitrogen tank to expel gases produced by evaporation. Maintain air circulation to avoid high oxygen concentrations and reduce the risk of fire and explosion.
Prevent Leaks: Regularly inspect the liquid nitrogen storage tank for leaks, equip with leak detectors and alarm systems. In case of a leak, take immediate action to control and repair the leak. Avoid harm to personnel and the environment caused by liquid nitrogen leaks.
Fire Prevention Measures: Nitrogen liquid has a low boiling and freezing point, which can easily cause fires. To prevent and contain fires, firewalls should be set up around nitrogen liquid storage tanks and fire-retardant coatings should be used.
Static protection: 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 and promptly repair or replace any damaged parts.
Waste Gas Treatment: Liquid nitrogen tanks produce waste gas during operation, and appropriate waste gas treatment measures must be taken.

The Zhongjie Liquid Oxygen Storage Tank boasts the following distinct advantages:
Material: Made of stainless steel, offering excellent corrosion and high-temperature resistance, ensuring the tank's long-term stable operation.
Manufacturing Process: The adopted manufacturing processes and equipment ensure the quality and precision of the tank's construction, meeting the process requirements.
Safety and Reliability: Tanks are designed and manufactured to stringent standards, equipped with safety valves, pressure sensors, and other safety devices, ensuring operation within normal working pressure ranges and the ability to handle emergencies.
Energy-saving: Tanks are equipped with optimized insulation design and materials, reducing energy loss and enhancing energy utilization efficiency.
High Capacity: The storage tank is designed with a large capacity, capable of meeting the liquid oxygen storage needs of various scales and requirements.
Flexible and Adjustable: The tank features a design that allows for capacity adjustment and expansion to meet actual needs.
Easy to operate and maintain: The tank features a user-friendly interface and control system, facilitating operation and maintenance for operators.
Longevity: The tank boasts excellent durability and corrosion resistance, ensuring long-term stable operation and reducing the frequency of replacements and maintenance.
Environmental Protection and Energy-Saving: Tanks are made with eco-friendly materials and processes, minimizing environmental impact, and also reduce energy consumption through energy-saving design and operation.
Customized Services: Zhejiang Jie Technology Co., Ltd. offers customized design and services for liquid oxygen storage tanks, tailored to meet customers' specific requirements and needs, ensuring personalized solutions.
These advantages make ZJET liquid oxygen storage tanks a reliable and safe solution for liquid oxygen storage, widely used in industries, scientific research, and other fields.

Safe operation of low-temperature liquid storage tanks is primarily critical in the following aspects:
Tank Design and Material Selection: The tank design must comply with relevant safety standards and regulations, capable of withstanding the pressure and temperature of low-temperature liquids. Select suitable materials, such as stainless steel and aluminum alloys, to ensure the tank's corrosion resistance and low-temperature performance.
Insulation and protective measures: Low-temperature liquid storage tanks should be equipped with effective insulation to reduce heat transfer and evaporation of the liquid. The selection and installation of the insulation should comply with relevant standards and requirements. Additionally, protective measures such as anti-freezing and anti-explosion precautions should be taken to ensure the safe operation of the tank.
Pressure Control and Safety Valves: Low-temperature liquid storage tanks should be equipped with reliable pressure control systems and safety valves to ensure the pressure inside the tank remains within a safe range. The pressure control system should be capable of promptly detecting and adjusting the pressure inside the tank to prevent risks posed by either excessively high or low pressure.
Leak and Fire Protection: Low-temperature liquids are highly flammable, so measures must be taken to prevent leaks and fires. Storage tanks and related pipelines should have good sealing properties and be regularly inspected and maintained to prevent leaks. Additionally, appropriate fire protection facilities and firefighting equipment should be provided to address fire risks.
Safe Operation and Training: Operators must undergo relevant safety training, familiarize themselves with the safe operation procedures and emergency response measures for low-temperature liquid storage tanks. Adhere to the correct operational steps to ensure safe operation.
Regular inspections and
Our company places great emphasis on technological innovation and R&D, boasting one 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. We are equipped with over 600 pieces of various 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 and technologies we have developed, such as temperature and pressure vessel welding, biomass boiler emission reduction, and waste heat utilization, have successively been selected for multiple Shandong Provincial Department of Industry and Information Technology Science and Technology Innovation projects, key projects in Shandong Province, and Heze City innovation and excellence projects. We have accumulated a total of 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 developed deep cryogenic container processing technology using the international plasma arc + filler wire tungsten inert gas arc welding (PAW-GTAW) technology. After provincial-level scientific and technological achievement identification, the technology level has reached international standards in the field of deep cryogenic container manufacturing. Choose ZJ Special Equipment, and let's create brilliance together!