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.
Liquid Oxygen Storage Tanks are specialized equipment that require careful attention to safety and an understanding of their characteristics. Below are the precautions and features for the use of liquid oxygen storage tanks: **Precautions:** - **Operation:** The operation of liquid oxygen storage tanks should be performed by trained and experienced personnel. Operators should be familiar with the tank's structure, performance, and operating procedures, and must operate strictly according to the manual and safety regulations. - **Fire Prevention Measures:** Liquid oxygen is highly oxidizing and can easily cause fires and explosions. Open flames and sources of sparks and high temperatures should be prohibited around the storage tank. Fire prevention equipment and fire extinguishers should be established, and regularly inspected and maintained. - **Leakage Control:** In the event of a leakage, immediate measures should be taken to control the leak. Leaks can lead to the evaporation of liquid oxygen and an increase in oxygen concentration, increasing the risk of fire and explosion. A leakage alarm system should be installed, and leakage control devices and personal protective equipment should be provided. - **Insulation Protection:** Liquid oxygen storage tanks should have good insulation to reduce evaporation and maintain low temperatures. The insulation should be regularly inspected and maintained to ensure its integrity and insulating performance. - **Safety Distance:** A certain safety distance should be maintained around the storage tank to prevent the spread of fires, explosions, and leaks. The specific requirements for safety distances should be assessed and determined according to local regulations and standards. **Features:** - **High Oxidizing Properties:** Liquid oxygen is highly oxidizing and can support combustion and cause it to burn more intensely. Therefore, careful fire and explosion prevention measures must be taken when using liquid oxygen storage tanks. - **High-Pressure Storage:** Liquid oxygen storage tanks typically store high-pressure oxygen, with pressures usually around 2-5 bar. Therefore, pressure control and the safety of pressure relief devices should be considered during operation and maintenance. - **Low-Temperature Storage:** The liquid oxygen within the storage tank is at low temperatures, usually around -183°C. Therefore, when contacting the liquid oxygen storage tank, appropriate protective measures should be taken.

Liquid Argon Storage Tanks are designed specifically for storing liquid argon, featuring the following parameters, functions, and characteristics:
Parameters:
Tank Capacity: The capacity of liquid argon tanks can be customized to meet requirements, with various sizes available, such as 500L, 1000L, 2000L, etc.
Working Pressure: The working pressure of liquid argon tanks is typically atmospheric or slightly above atmospheric pressure.
Storage Temperature: The storage temperature for liquid argon tanks is typically -196 degrees Celsius, which is the boiling point of argon, maintaining its liquid state.
Feature:
Store Liquid Argon: Liquid argon tanks are primarily used for storing liquid argon, maintaining its liquid state at low temperatures for supply and use.
Insulation: The liquid argon storage tank utilizes advanced insulation materials and structural design to minimize heat conduction and retention, maintaining the low-temperature state of liquid argon.
Safety Control: The liquid argon storage tank is equipped with safety devices such as pressure relief valves and level alarms to ensure safe operation and use.
Features:
High Purity Supply: Liquid Argon Storage Tanks offer high purity liquid argon for applications such as cryogenic storage, gas shielded welding, and semiconductor manufacturing.
Long-term Storage: Liquid argon tanks are designed for long-term storage of liquid argon, extending its service life. By controlling the temperature within the tank and the performance of the insulation layer, the evaporation and oxidation of the liquid argon are slowed down.
Versatile Applications: Liquid argon storage tanks are widely used in various fields such as industry and scientific research, including refrigeration and semiconductor manufacturing.
Environmental Protection and Energy Saving: Liquid argon storage tanks enable efficient storage and utilization of liquid argon, reducing energy waste and environmental pollution.
In summary, liquid argon storage tanks are designed for storing liquid argon, thermal insulation, and safety.

The reasons for not leaving liquid oxygen tanks empty for extended periods are mainly as follows:
Evaporation Loss of Liquid Oxygen: Liquid oxygen has a low boiling point, and prolonged storage without use will cause continuous evaporation, resulting in a loss of liquid oxygen within the storage tank. The evaporation rate is relatively fast, with daily evaporation amounts potentially reaching several percent of the tank's capacity. Extended periods of storage without use can lead to waste of liquid oxygen.
Safety Risk: Liquid oxygen is a strong oxidizer with high flammability and explosive properties. Long-term emptying of liquid oxygen storage tanks increases the opportunity for contact between the liquid oxygen and the surrounding environment, thereby raising the risk of accidental fires and explosions.
Risk of Storage Tank Damage: Long-term emptying of liquid oxygen storage tanks can lead to internal oxidation reactions, accelerating corrosion and damage to the tank. Tank damage can affect its sealing performance and structural integrity, increasing the risk of leaks and safety accidents.
Therefore, to ensure the safe storage and effective use of liquid oxygen, liquid oxygen tanks should be regularly maintained and serviced to avoid long-term disuse. When the tank is not in use, appropriate measures should be taken, such as sealing the tank and reducing the evaporation of liquid oxygen, to minimize losses and safety risks.

The application of strain-hardening in austenitic stainless steel on low-temperature pressure vessels is a common method, which can enhance the material's strength and durability. Below are some details regarding the application of strain-hardening in austenitic stainless steel on low-temperature pressure vessels:
Principle of Strain Hardening: Strain hardening is achieved by introducing plastic deformation into the material, which alters the crystal structure, thereby increasing the material's strength. In Austenitic stainless steel, strain can be introduced through methods such as cold working (e.g., cold rolling, cold drawing) or heat treatment (e.g., solution treatment and cold deformation), causing crystal defects and grain boundary slips, thus enhancing the material's strength.
Low-Temperature Application Advantages: Austenitic stainless steel exhibits excellent corrosion resistance and low-temperature toughness in cold environments. Strain hardening can further enhance the strength and durability of austenitic stainless steel, enabling it to perform in low-temperature pressure vessels. Under low-temperature conditions, strain hardening effectively resists plastic deformation and fracture, improving the material's tensile strength and impact resistance.
Application Cases: Austenitic stainless steel strain-hardening is widely used in low-temperature pressure vessels. For instance, in liquid nitrogen, liquid oxygen, and liquid argon tanks, etc., strain-hardened austenitic stainless steel is commonly used as structural material. These vessels must withstand high pressure and impact loads at low temperatures; strain-hardening enhances the material's strength and durability, ensuring the safe operation of the containers.
It should be noted that the strain hardening of austenitic stainless steel must be carried out at appropriate temperatures and deformation conditions to avoid excessive deformation and material embrittlement. When designing and manufacturing low-temperature pressure vessels, the specific engineering requirements and material characteristics should be considered to rationally select and apply the strain hardening of austenitic stainless steel.
Shandong Zhongjie Special Equipment, welcome customers to our factory for business discussions.