Shandong Zhongjie Special Equipment (formerly Heze Boiler Factory Co., Ltd.) holds an A-grade boiler manufacturing license, A2-grade pressure vessel manufacturing license, A2-grade pressure vessel design license, B-grade boiler installation and GB2, GC2 class pressure pipeline installation licenses, as well as mechanical and electrical equipment installation contracting qualifications. 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 certifications for the ISO9001 Quality Management System, ISO14001 Environmental Management System, OHSAS18001 Occupational Health and Safety Management System, and the American ASME/U2 certification.
The leak treatment methods for liquid argon storage tanks mainly include the following steps:
Identified Air Leaks: Detected through odors, gas detection equipment, or abnormal pressure in liquid argon storage tanks, air leaks in the liquid argon storage tanks are identified.
Confirm air leakage location: Use gas detection instruments or foam leak detection agents, etc., to pinpoint the exact location of the air leakage. Check tank interfaces, valves, pipe connections, and other areas to locate the air leakage points.
Seal Air Leaks: Take appropriate measures to stop air leaks based on their location. For instance, for leaks at joints, inspect and adjust sealing washers or tighten bolts; for valve leaks, check and replace seals.
Isolate Air Leak Areas: During the process of dealing with air leaks, it is necessary to isolate the air leak areas to ensure personnel safety. Set up warning signs, restrict access to the area, and take necessary protective measures, such as wearing protective masks and gloves.
Depletion of Liquid Argon: If air leakage cannot be repaired immediately or the leakage volume is significant, consider depleting the liquid argon. By gradually reducing the pressure of liquid argon within the storage tank, convert it into a gas, and minimize the risk of air leakage.
Ventilation Treatment: During the air leakage treatment, ensure adequate ventilation and promptly expel the gases produced by the evaporation of liquid argon. Natural ventilation or the use of ventilation equipment can be employed to exhaust the evaporated gases of liquid argon outdoors.
Safety Assessment and Repair: After completing the air leakage treatment, conduct a safety assessment to ensure the tank's safety. Based on the assessment results, carry out necessary repairs and maintenance to prevent further air leakage.
Note that liquid argon is a low-temperature liquid with a low boiling and freezing point. Extra caution is required when handling air leaks to avoid contact, which can cause chilling. When dealing with a leak in a liquid argon storage tank, operations should be performed by personnel and in accordance with relevant safety operating procedures and standards.

To prevent the dangers associated with liquid oxygen tanks, the following precautions 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 inspections and maintenance on liquid oxygen tanks, including visual inspections, pressure tests, and leak detection. Promptly identify and address any tank issues 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, and protective equipment such as firewalls 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 contains a high concentration of oxygen, which is prone to cause fires. Therefore, fire prevention measures such as fire walls 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 ability to take prompt action to control the leakage and ensure personnel safety.
Training and Awareness Enhancement: Conduct regular safety training for personnel operating liquid oxygen tanks 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), which causes dislocation and grain boundary sliding in the crystal structure, leading to increased material strength.
Advantages in Low-Temperature Applications: 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: The strain-hardening of austenitic stainless steel is widely used in low-temperature pressure vessels. For example, in liquid nitrogen, liquid oxygen, and liquid argon storage tanks, and other low-temperature containers, strain-hardened austenitic stainless steel is commonly used as a 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 is important to note that strain hardening of austenitic stainless steel should be conducted under appropriate temperatures and deformation conditions to avoid over deformation and material embrittlement. When designing and manufacturing low-temperature pressure vessels, the specific engineering requirements and material properties should be considered to rationally select and apply strain hardening techniques for austenitic stainless steel.

The medical oxygen steel cylinder refilling plant, in addition to the liquid oxygen storage tanks, 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, ensuring the purity and quality of the supplied oxygen. The system typically includes filters, adsorbents, and molecular sieves.
Oxygen Storage System: In addition to liquid oxygen tanks, an oxygen filling area 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 pipeline, and filling control system.
Oxygen Quality Monitoring System: The oxygen quality monitoring system is used for monitoring the quality and purity of oxygen being filled. Quality checks and monitoring are conducted on the filled oxygen through an oxygen analyzer or other detection equipment.
Safety Facilities: The filling plant area should be equipped with corresponding safety facilities, such as fire alarm systems, oxygen leak detection systems, ventilation systems, etc., to ensure the safety and protective measures of the filling process.
It is important to note that the design and equipment configuration of the medical oxygen cylinder filling area should comply with relevant regulations, standards, and specifications. During the filling process, strict adherence to operational procedures and safety requirements is essential to ensure the safe supply of oxygen.
Our company places great emphasis on technological innovation and R&D, 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, and more. We are equipped with over 600 pieces of various 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. 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 scientific and technological 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 arc welding (PAW-GTAW) technology. After provincial-level scientific and technological achievement evaluation, the technology level has reached an international standard in the field of deep cryogenic container manufacturing. Choose Zhongjie Special Equipment, and let's create brilliance together!