Shandong Zhongjie Special Equipment (formerly Heze Boiler Factory Co., Ltd.) was established in 2001, located at No. 2218 Jinan Road, Economic and Technological Development Zone, Heze City. With a registered capital of 50 million yuan and total assets of 500 million yuan, the company has seven business centers: boilers, deep-freezing containers, pressure vessels, central air conditioning, engineering installation, international trade, and the Internet of Things. It has three factory sites on Jinan Road, East Yangtze Road, and Bohai Road, covering a total of 200,000 square meters. The main workshop spans 83,000 square meters. The company currently employs 710 people, including 247 engineers and technicians, and 82 intermediate-level technical personnel. It was recognized as a "High-Tech Enterprise" by the Science and Technology Department in December 2016, as a "Shandong Specialized and New Enterprise" by the Ministry of Industry and Information Technology in June 2021, as a "Shandong Gazelle Enterprise" in June 2022, and as a "Specialized and New Small Giant Enterprise" by the Ministry of Industry and Information Technology in August 2022.
Maintenance and care of liquid nitrogen tanks are crucial for ensuring 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, including 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 storage tank to remove dust and grime. If there is ice or frost inside the tank, defrosting is required to maintain the tank's normal operating condition.
Level Monitoring: Regularly monitor the liquid nitrogen storage tank's level to ensure the stored amount of liquid nitrogen remains within a safe range. In case of an abnormal level, adjustments or supplementation of liquid nitrogen are required promptly.
Regular maintenance and replacement of components: Conduct regular maintenance and replacement of critical components of liquid nitrogen tanks, such as safety valves, pressure sensors, and temperature sensors, to ensure their proper operation and accuracy.
Inspect the insulation layer: Regularly check the liquid nitrogen tank's insulation layer to ensure its integrity and insulating performance. If any damage or aging is found in the insulation layer, it should 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 performed according to relevant standards and regulations.
Safety Training and Operating Procedures: Conduct regular safety training for liquid nitrogen storage tanks to ensure operators are familiar with the safe operation procedures and emergency response measures.
Note that maintenance of liquid nitrogen tanks should be conducted by trained and authorized personnel. Adhere to relevant safety standards and operational guidelines to ensure the safety and effectiveness of maintenance work.

Liquid Argon Storage Tanks are used for storing and transporting liquid argon. Their application scope and characteristics are as follows:
Application Scope:
Industrial Applications: Liquid argon storage tanks are widely used in industrial sectors such as metal processing, electronic manufacturing, semiconductor production, and more.
Application: Liquid argon tanks are used in the field for cryogenic preservation of biological samples, cells, tissues, and vaccines.
Laboratory Applications: Liquid argon tanks are used in scientific research laboratories for low-temperature experiments, cryogenic storage, and sample processing, etc.
Features:
Low-temperature performance: As liquid argon has a boiling point of -185.7°C, the liquid argon storage tank must have excellent low-temperature insulation properties to maintain the low-temperature state of the liquid argon.
High-sealed integrity: Liquid argon storage tanks must have excellent sealing performance to prevent evaporation loss of liquid argon and the entry of external air.
Safety: Liquid argon is a flammable and explosive substance, thus the liquid argon storage tank must be equipped with safety valves, leak detectors, and other safety devices to ensure safe operation.
Large Capacity: The capacity of liquid argon tanks ranges from a few liters to several thousand liters, allowing for the selection of an appropriate capacity based on requirements.
Cautionary Notes:
Protective Gear: When handling liquid argon storage tanks, it is mandatory to wear appropriate protective gear, including gloves, protective clothing, and non-slip shoes, to safeguard against the low temperature of liquid argon and other hazards.
Ventilation Requirements: Please specify

Consider the following aspects to distinguish the quality of liquid nitrogen storage tanks:
Material: Liquid nitrogen storage tanks are typically made from high-strength, corrosion-resistant materials such as stainless steel or aluminum alloy. These materials offer excellent corrosion resistance and mechanical strength, ensuring the tank operates stably over a long period.
Sealability: The liquid nitrogen tank should have excellent sealing performance to effectively prevent nitrogen leakage. The valves, pipe connections, and other parts of the tank should be designed reasonably to ensure reliable sealing.
Insulation: The liquid nitrogen tank should have excellent insulation properties to minimize evaporation losses. The tank's insulation layer should utilize materials like polyethylene foam to reduce heat conduction and evaporation losses.
Safety: Liquid nitrogen tanks should possess excellent safety features, including safety valves, pressure gauges, and other safety equipment, as well as fire and explosion-proof functions. The design and manufacturing of the tank should comply with relevant safety standards and regulations.
Service Life: Liquid nitrogen tanks generally have a long service life, capable of withstanding prolonged use and transportation. The manufacturer and reputation are also significant factors in assessing the service life.
Price and After-Sales Service: The price of liquid nitrogen tanks should be reasonable, with excellent after-sales service provided. Choosing manufacturers or suppliers with a good reputation and solid after-sales service ensures the quality of the product and technical support.
Considering these factors, one can distinguish the quality of liquid nitrogen tanks. When selecting a liquid nitrogen tank, it's recommended to choose one that meets the specific requirements and usage environment, ensuring safe and reliable storage of liquid nitrogen.

Safe operation and transportation of liquid oxygen storage tanks require attention to the following points:
Safety Usage Instructions:
Tank Selection: Choose liquid oxygen tanks that comply with regulations 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 tank, and it should be kept away from flammable materials and heat sources.
Sealability Inspection: Regularly check the tank's sealing performance to ensure there are no leakage at valve and pipeline connections.
Pressure Control: Tanks should be equipped with pressure gauges and safety valves, and undergo regular inspections and maintenance to ensure pressure is within safe limits.
Fire Prevention Measures: Liquid oxygen contains a high oxygen content and is highly flammable. Install firewalls around the storage tanks, prohibit smoking and open flames, and ensure safety.
Static Protection: During the transportation and use of liquid oxygen, static electricity 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.
Shipping Precautions:
Transportation Vehicle Selection: Choose transportation vehicles that meet the requirements for liquid oxygen transport, ensuring their safety and sealing integrity.
Loading and Unloading: During the transportation of liquid oxygen, the following loading and unloading procedures should be adopted:
Our company highly values technological innovation and research and development. We possess 1 city-level enterprise technology center in Heze City, with testing facilities for non-destructive testing, physical and chemical testing, welding testing, hydrostatic testing, and more. We are equipped with over 600 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 others. The key products we have developed, such as temperature and pressure vessel welding, biomass boiler emissions reduction, and waste heat utilization, have successively been included in multiple Shandong Provincial Department of Industry and Information Technology science and technology projects, Shandong key projects, and Heze City innovation and excellence projects. We have accumulated 27 authorized utility model patents, 16 authorized invention patents, participated in drafting 2 standards, 2 industry standards, and registered 15 trademarks. The technical team of our company, in collaboration with Professor Li Yajiang of Shandong University, has developed deep cryogenic container processing technology using the international plasma arc + wire-filled tungsten inert gas arc welding (PAW-GTAW) technology. The provincial-level scientific and technological achievement appraisal has determined that our technology level in deep cryogenic container manufacturing has reached an international standard. Choose Zhongjie Special Equipment, let's join hands to create brilliance together!