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, a B-grade boiler installation license, and GB2/Class and GC2/Class pressure pipeline installation licenses, as well as a mechanical and electrical equipment installation contracting qualification. It is a member of the China Boiler and Water Treatment Association, the China Chemical Equipment Association, and the Council Member of the Shandong Equipment Manufacturing Association. The company has also passed the ISO9001 Quality Management System, ISO14001 Environmental Management System, OHSAS18001 Occupational Health and Safety Management System certifications, and the ASME/U2 certification.
The leak treatment methods for liquid argon storage tanks mainly include the following steps:
Identified Air Leaks: Air leaks in liquid argon tanks are discovered through methods such as detecting odors, using gas detection equipment, or abnormal pressure in liquid argon storage tanks.
Confirm air leakage location: Use gas detection equipment or foam leak detection agents, etc., to pinpoint the exact location of air leakage. Check tank interfaces, valves, pipe connections, and other areas to locate the air leakage points.
Cease air leakage sources: Take appropriate measures to stop air leakage sources based on the leakage location. For instance, for leakage at joints, inspect and adjust sealing washers or tighten bolts; for valve leakage, inspect and replace seals.
Isolate Air Leaks: During the process of dealing with air leaks, it is essential to isolate the leaky areas to ensure personnel safety. Set up warning signs, restrict access to the areas, and take necessary protective measures, such as wearing protective masks and gloves.
Depleting Liquid Argon: If a leak cannot be repaired immediately or the leak rate is significant, consider depleting the liquid argon. By gradually reducing the pressure inside the storage tank, the liquid argon is converted into gas, reducing the risk of leakage.
Ventilation Treatment: During the air leakage treatment, ensure good ventilation and promptly exhaust the gases produced by the evaporation of liquid argon. Natural ventilation or the use of ventilation equipment can be employed to expel the vaporized gas of liquid argon outdoors.
Safety Assessment and Repair: After the air leakage treatment is completed, conduct a safety assessment to ensure the tank's safety. Based on the assessment results, carry out necessary repairs and maintenance to prevent the recurrence of air leakage.
Note that liquid argon is a low-temperature liquid with a low boiling and freezing point. Caution is required when dealing with air leaks to prevent contact with liquid argon, which can cause coldness. When handling air leaks in liquid argon storage tanks, the operation should be performed by personnel and in accordance with relevant safety operating procedures and standards.

To prevent risks associated with liquid oxygen tanks, the following preventive measures can be taken:
Safety Operations and Management: Establish and enforce stringent safety operations and management systems, including proper use of storage tanks, operational procedures, and safety training. Ensure operators possess the necessary safety awareness and skills, adhere to operational procedures, and minimize operational errors and the likelihood of accidents.
Regular Inspections and Maintenance: Conduct regular checks and maintenance on liquid oxygen tanks, which include visual inspections, pressure tests, leak detection, etc. Detect and address tank issues promptly to ensure safety and reliability.
Safety devices and protective equipment: Tanks should be equipped with necessary safety devices, such as pressure relief valves, level alarms, etc., as well as protective equipment like fire barriers and explosion-proof devices. These devices and equipment can take timely measures in abnormal situations to ensure the safety of the tank.
Fire Prevention Measures: Liquid oxygen has a high oxygen content, which is prone to causing fires. Therefore, fire prevention measures such as firewalls and fire extinguishers should be set up around the storage tanks to prevent the spread and expansion of fires.
Leakage Control and Emergency Response Plan: Establish a liquid oxygen tank leakage control and emergency response plan, including leakage control measures, emergency response procedures, and evacuation plans. In the event of a leakage incident, the plan enables quick action to control the leak and ensure personnel safety.
Training and Awareness Enhancement: Conduct regular safety training for liquid oxygen tank operators to enhance their safety awareness and emergency response capabilities. Strengthen safety

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. Here 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 enhancing 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 dislocations and grain boundary sliding in the crystal structure, thus increasing 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 of the material, improving its 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 tanks, liquid oxygen tanks, and liquid argon tanks, among other low-temperature containers, strain-hardened austenitic stainless steel is commonly used as structural material. These vessels must withstand high pressures and impact loads at low temperatures; strain-hardening enhances the material's strength and durability, ensuring 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, it is essential to select and apply austenitic stainless steel strain hardening reasonably, based on specific engineering requirements and material characteristics.

The medical oxygen steel cylinder filling area, in addition to the liquid oxygen storage tank, includes the following components:
Oxygen Compressor: Oxygen compressors are used to compress gaseous oxygen into high-pressure oxygen. These compressors are typically made with special materials and designs to ensure safe handling and compression of oxygen.
Oxygen Purification System: The oxygen purification system is designed to remove impurities and contaminants from oxygen to ensure the purity and quality of the supplied oxygen. The system typically includes filters, adsorbents, and molecular sieves.
Oxygen Storage Systems: In addition to liquid oxygen tanks, an oxygen filling facility may also include a gaseous oxygen storage system for temporary storage and supply of gaseous oxygen. The gaseous oxygen storage system typically consists of high-pressure oxygen cylinders or gas storage tanks.
Filling Equipment: Filling equipment is used to transfer oxygen from liquid oxygen storage tanks or gaseous oxygen storage systems into medical oxygen steel cylinders. The filling equipment typically includes a filling machine, filling pipes, and filling control systems.
Oxygen Quality Monitoring System: The oxygen quality monitoring system is used to monitor the quality and purity of oxygen being filled. Quality checks and surveillance are conducted on the filled oxygen through an oxygen analyzer or other detection equipment.
Safety Facilities: The filling area should be equipped with corresponding safety facilities, such as fire alarm systems, oxygen leak detection systems, and ventilation systems, to ensure the safety and protective measures during the filling process.
It is essential that the design and equipment configuration of the medical oxygen cylinder filling area comply with relevant regulations, standards, and specifications. During the filling process, strict adherence to operational procedures and safety requirements must be maintained to ensure the safe supply of oxygen.
Our company attaches great importance to technological innovation and R&D design. We possess one municipal-level enterprise technology center in Heze City, with 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 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, Shandong Provincial key projects, and Heze City innovation and excellence projects. We have accumulated 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 + wire-filled 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, and let's create brilliance together!