Shandong Zhongjie Special Equipment (formerly Heze Boiler Factory Co., Ltd.) was established in 2001, located at No. 2218 Jinnan 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 7 business centers: boiler, deep-freeze containers, pressure vessels, central air conditioning, engineering installation, international trade, and Internet of Things. It operates three factory sites on Jinnan Road, East Changjiang Road, and Bohai Road, covering a total area 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 technical personnel. In December 2016, it was recognized as a "High-Tech Enterprise" by the Science and Technology Department. In June 2021, it was named a "Specialized and New Enterprise in Shandong Province" by the Ministry of Industry and Information Technology. In June 2022, it was identified as a "Gazelle Enterprise in Shandong Province" and in August 2022, it was recognized as a "Specialized and New Small Giant Enterprise" by the Ministry of Industry and Information Technology.
Liquid Oxygen Storage Tanks are equipment 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. These tanks are typically made of high-strength materials like stainless steel to withstand the low temperatures and high pressures of liquid oxygen. The interior usually features insulation to minimize evaporation and maintain the low temperature of the liquid oxygen. The design and manufacturing of liquid oxygen storage tanks must consider safety and reliability to prevent leaks and explosions. Strict operational procedures and safety standards must be followed when using these tanks to ensure the safety of personnel and equipment. The development and manufacturing of liquid oxygen storage 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 diverse needs and application scenarios of users.

The oxygen filling process for liquid oxygen tanks must adhere to specific operational procedures and safety measures. Here are the steps for filling a liquid oxygen tank:
Preparation: Ensure the tank and oxygen-filling equipment are in good working condition, check the tank's seal integrity and the proper operation of the safety valve.
Connect equipment: Link the aeration equipment to the storage tank, ensuring the connection is sealed reliably.
Prepare liquid oxygen: Transfer liquid oxygen from the storage container to the storage tank of the oxygen-filling equipment. During the transfer, be cautious to prevent leakage and contact.
Oxygen Filling Operation: Open the valve of the oxygen filling equipment and fill liquid oxygen from the oxygen storage tank into the storage tank. During the filling process, control the filling speed and pressure to avoid excessive pressure and temperature increase in the storage tank.
Monitoring and Control: During the aeration process, the pressure and temperature of the storage tank must be monitored to ensure they remain within safe limits. In case of any anomalies, oxygenation should be stopped immediately and appropriate actions should be taken.
Oxygen Filling Completed: Close the valve of the oxygen filling equipment and cease the oxygen filling operation once the tank reaches the required oxygen level or pressure.
Safety Handling: After oxygenation is completed, safety handling is required, including closing relevant valves and emptying the remaining liquid oxygen from the oxygenation equipment.
Note that liquid oxygen is highly oxidizing and flammable; the oxygen filling process must strictly adhere to relevant safety operational procedures and standards. Operators should receive training and strictly follow the operational procedures and safety measures to ensure the safety and reliability of the oxygen filling process.

The operational and protection procedures for the application of low-temperature liquid nitrogen storage tanks should include the following:
Staff Training: All operators are required to undergo safe operation training for liquid nitrogen tanks, familiarize themselves with the properties, hazards, and proper operating procedures as well as emergency response measures.
Protective Gear: Operators must wear appropriate protective gear, including gloves, protective suits, and non-slip shoes, to safeguard themselves from the low temperatures of liquid nitrogen and other hazards.
Ventilation Requirements: Ensure adequate ventilation in the operational area of the liquid nitrogen storage tank to expel gases produced by the evaporation of liquid nitrogen. Avoid excessive oxygen concentration to minimize the risk of fire and explosion.
Leakage Control: Tanks must be equipped with leak detection and alarm systems to promptly detect and control the leakage of liquid nitrogen. Upon discovering a leak, immediate action should be taken to control the source of the leak and carry out repairs.
Fire Prevention Measures: Nitrogen liquid has a low boiling and freezing point, which is prone to cause fires. Measures such as setting up fire barriers around nitrogen liquid storage tanks and using fire-resistant coatings are taken to prevent fires from occurring and spreading.
Static Protection: Electrostatic buildup in liquid nitrogen tanks may cause sparks, increasing the risk of fire. Measures such as using 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, pipelines, pressure gauges, etc. Ensure that the equipment is in perfect condition, and promptly repair or replace any damaged parts.
Waste Gas Treatment: Nitrogen liquid storage tanks produce waste gas during operation, which requires appropriate waste gas treatment measures to prevent harm to the environment and human health.
Emergency Response Plan: Develop an emergency response plan for liquid nitrogen tanks, including procedures for handling leakage incidents, emergency rescue measures, and the protocol for notifying relevant departments. Operators

A 50-cubic-meter liquid oxygen tank refers to a storage tank with a capacity of 50 cubic meters. Liquid oxygen tanks are commonly used for storing and supplying liquid oxygen, for applications such as research, experiments, and more.
Key features and configurations of a 50 cubic meter liquid oxygen storage tank may include the following aspects:
Volume: The 50 cubic meter liquid oxygen tank has a capacity of 50 cubic meters, allowing for the storage of larger quantities of liquid oxygen.
Structure: Liquid oxygen tanks commonly feature a double or multi-layered design, filled with insulating material in between to minimize heat transfer and evaporation of the liquid oxygen. The tank material is typically made of stainless steel or aluminum alloy, which offers excellent corrosion resistance and low-temperature performance.
Insulation Layer: The insulation layer of liquid oxygen storage tanks typically uses multi-layer insulation materials such as polyethylene foam, glass fiber, and vacuum layers to reduce heat transfer and the evaporation of liquid oxygen.
Temperature Control System: Liquid oxygen storage tanks are typically equipped with a temperature control system to regulate the tank's temperature and maintain the低温 state of liquid oxygen.
Safety Equipment: Liquid oxygen tanks are typically equipped with safety devices such as pressure sensors, temperature sensors, and safety valves to ensure safe operation of the tank.
It is crucial to strictly adhere to the relevant safety regulations and operational guidelines when using liquid oxygen tanks to ensure their safe operation and use. Liquid oxygen is highly flammable, so fire prevention measures must be taken when using liquid oxygen tanks, and it is essential to ensure there are no ignition sources nearby.
Our company attaches great importance to technological innovation and R&D design, boasting one municipal-level enterprise technology center in Heze City. We have established testing facilities for non-destructive testing, physical and chemical testing, welding testing, hydrostatic testing, etc. Equipped with over 600 types of 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, our R&D has focused on key products such as temperature-pressure vessels for welding, biomass boiler emission reduction, and waste heat recovery. These technologies have successively been shortlisted for multiple Shandong Provincial Department of Industry and Information Technology science and technology innovation projects, Shandong Provincial key projects, and Heze City innovative and excellent 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 Yajiang Li of Shandong University, has developed deep cryogenic container processing technology using the international plasma arc + filler wire tungsten inert gas (PAW-GTAW) welding technique. After being appraised as a provincial-level scientific and technological achievement, our technology level in deep cryogenic container manufacturing has reached international standards. Choose Zhongjie Special Equipment, and let's create brilliance together!