Shandong Zhongjie Special Equipment (formerly Heze Boiler Factory Co., Ltd.) holds an A-grade boiler manufacturing license, an A2-grade pressure vessel manufacturing license, an A2-grade pressure vessel design license, B-grade boiler installation and GB2, GC2 class pressure pipeline installation licenses, as well as equipment and mechanical installation contracting qualifications. It is a member of the China Boiler and Water Treatment Association, the China Chemical Equipment Association, and a director unit of the Shandong Equipment Manufacturing Association. The company has also passed certifications for the ISO9001 Quality Management System, ISO14001 Environmental Management System, OHSAS18001 Occupational Health and Safety Management System, and the U.S. ASME/U2 certification.
Maintenance and upkeep are crucial for ensuring the safety of low-temperature storage tanks. Here are some common maintenance measures:
Regular Inspections: Conduct regular checks on low-temperature storage tanks, including inspections of the exterior, internal structure, and corrosion-resistant coatings. Look for cracks, corrosion, wear, and other issues, and identify and repair potential safety hazards promptly.
Cleaning and De-icing: Regularly clean the exterior surface and internal structure of the low-temperature storage tank to remove accumulated dirt and ice layers. The buildup of ice can lead to structural damage and corrosion; cleaning and de-icing can extend the lifespan of the tank.
Level Monitoring: Regularly monitor the liquid level in low-temperature storage tanks to ensure it stays within the safe range. Excessive or insufficient levels can lead to overpressure or over-vacuum in the tanks, increasing safety risks.
Leak Detection: Install a leak detection system to regularly check for leaks in low-temperature storage tanks. Leaks can lead to the release and evaporation of liquids or gases, increasing safety risks.
Corrosion Protection Measures: Implement appropriate corrosion protection measures, such as coating protection and corrosion-resistant coatings, to safeguard the metallic structure of low-temperature storage tanks from corrosion damage.
Emergency Fault Handling: Establish an emergency fault handling mechanism to promptly address and repair failures in low-temperature storage tanks, in order to prevent accidents from occurring or escalating.
Training and Development: Train and develop operators and maintenance personnel to ensure they possess relevant knowledge and skills for proper operation and maintenance of low-temperature storage tanks.
Be mindful that maintenance and care should be tailored to the specific type of tank and its operating conditions, adhering to relevant local laws, regulations, and standards. During maintenance, it is advisable to consult with engineers or relevant institutions for guidance to ensure the tank's safety and reliability.

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 increases material strength by introducing plastic deformation into the material, thereby altering the crystal structure. 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 dislocation and grain boundary slip in the crystal structure, thereby enhancing the material's strength.
Advantages in Low-Temperature Applications: Austenitic stainless steel exhibits excellent corrosion resistance and low-temperature toughness in cold environments. Strain hardening further enhances 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: Strain-hardened Austenitic stainless steel 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 employed 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 safe operation of the containers.
It is important to note that strain hardening of austenitic stainless steel should be carried out at appropriate temperatures and deformation conditions to avoid excessive deformation and material embrittlement. When designing and manufacturing low-temperature pressure vessels, it is necessary to reasonably select and apply the strain hardening of austenitic stainless steel based on specific engineering requirements and material characteristics.

Liquid Argon Storage Tanks are equipment used for storing and transporting liquid argon, with the following scope and characteristics:
Application Scope:
Industrial Applications: Liquid Argon Storage Tanks are widely used in industrial sectors such as metal processing, electronic manufacturing, semiconductor production, and more.
Applications: Liquid argon storage 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, cryopreservation, and sample processing, etc.
Features:
Low-temperature performance: With a boiling point of -185.7°C, liquid argon tanks must have excellent low-temperature insulation to maintain the低温 state of liquid argon.
High-sealed performance: Liquid argon storage tanks must have excellent sealing properties to prevent evaporation loss of liquid argon and the entry of external air.
Safety: Liquid argon is a flammable and explosive substance; therefore, liquid argon tanks must be equipped with safety valves, leak detectors, and other safety devices to ensure safe operation.
Large Capacity: The capacity of liquid argon storage tanks ranges from a few liters to several thousand liters, allowing for selection of the appropriate capacity based on requirements.
Cautionary Notes:
Protective Gear: When operating liquid argon tanks, it is mandatory to wear appropriate protective gear, including gloves, protective clothing, and non-slip shoes, to safeguard against the low temperatures of liquid argon and other hazards.
Ventilation Requirements: Please provide.

Low-temperature storage tanks offer several advantages:
Storage: Low-temperature storage tanks can keep liquid low-temperature substances (such as liquid nitrogen, liquid oxygen, etc.) at low temperatures, maintaining their liquid state. Compared to gas storage, liquid storage can significantly increase storage density and save space.
Long-term Storage: Low-temperature storage tanks are suitable for long-term storage of low-temperature materials, extending their service life. By controlling the temperature within the tank and the performance of the insulation layer, the evaporation and oxidation of the liquid materials can be slowed down, maintaining their stability and purity.
Safety: The low-temperature storage tank boasts excellent safety performance. The tank is made of special materials and designed with a structure that can withstand low temperatures and high pressures. Additionally, the tank is equipped with safety devices such as pressure relief valves and level alarms to ensure safe operation and use.
Multi-Domain Applications: Low-temperature storage tanks are widely used across various fields. They can be utilized for storing liquid oxygen and providing oxygen supply; in industrial sectors, they are used for storing liquefied natural gas (LNG) and other process gases like liquid nitrogen; in the scientific research field, they can store low-temperature experimental samples.
Environmental Protection and Energy Saving: Low-temperature storage tanks can effectively store and utilize low-temperature materials, reducing energy waste and environmental pollution. During the storage and transportation of liquid materials, energy loss is minimal, enhancing energy utilization efficiency.
In summary, low-temperature storage tanks offer advantages such as storage, long-term storage, safety, multi-industry applications, and environmental protection and energy conservation. This makes them a crucial equipment for storing and supplying low-temperature materials, playing a vital role across various fields.
Our company attaches great importance to technological innovation and R&D design. We have one municipal-level enterprise technology center in Heze City, equipped with non-destructive testing, physical and chemical testing, welding testing, hydrostatic testing, and other testing facilities. We have over 600 various 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 more. Our key products such as temperature and pressure vessel welding, biomass boiler emission reduction, and waste heat utilization have successively been included in 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 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 evaluation, the technology level has reached international standards in the field of deep cryogenic container manufacturing. Choose Zhongjie Special Equipment, let's create brilliance together!