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, GC2/Class pressure pipeline installation licenses, as well as equipment and machinery 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, and has passed the ISO9001 Quality Management System, ISO14001 Environmental Management System, OHSAS18001 Occupational Health and Safety Management System certifications, and the American ASME/U2 certification.
Possible causes for leakage in liquid argon storage tanks include:
Design or Manufacturing Defects: Defects in the design or manufacturing process of the tank, such as poor welding, improper material selection, or inadequate sealing, may lead to leakage issues in the tank.
Corrosion and Oxidation: Long-term exposure of liquid argon tanks to low temperatures can lead to corrosion and oxidation. These can damage the tank's surface protective layer, causing leakage issues.
Fatigue and stress cracking: During long-term use, storage tanks may experience fatigue and stress cracking due to temperature and pressure fluctuations. These cracks can degrade the tank's sealing performance, leading to leaks.
Improper Operation: Failure to follow proper procedures during the storage tank's operation, such as overfilling with liquid argon or excessive pressure, can lead to tank damage and leakage.
External Damage: The tank may sustain damage from external factors such as mechanical impacts or objects.

The leak treatment methods for liquid argon storage tanks primarily include the following steps:
Identified Air Leaks: Detected through odors, gas detection instruments, or abnormal pressure in liquid argon storage tanks, air leaks in the liquid argon storage tank are found.
Confirm air leak location: Use gas detection equipment or foam leak detection agents, etc., to pinpoint the exact location of the air leak. Inspect tank interfaces, valves, pipe connections, and other areas to locate the air leak points.
Cease Air Leaks: Take appropriate measures based on the location of the air leaks to stop the source. For instance, with leaks at joints, inspect and adjust sealing washers or tighten bolts; for valve leaks, check and replace sealing parts.
Isolate Air Leaking Areas: During the process of dealing with air leaks, it is necessary to isolate the leaking areas to ensure personnel safety. Set up warning signs, restrict access to the area, and take necessary protective measures, such as wearing protective masks, gloves, etc.
Evacuating Liquid Argon: If air leakage cannot be repaired immediately or the leakage is substantial, consider evacuating the liquid argon. By gradually reducing the pressure of liquid argon within the tank, convert it to gas, and mitigate the risk of air leakage.
Ventilation Treatment: During the leak treatment process, 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 evaporated gas of liquid argon outside.
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 the recurrence of air leakage.
Be mindful that liquid argon is a cryogenic liquid with low boiling and freezing points. Caution is required when handling leaks to avoid contact and subsequent coldness. When dealing with a leak in a liquid argon storage tank, the operation should be performed by personnel and in accordance with relevant safety operating procedures and standards.

In the welding process of low-temperature liquid storage tanks, controlling the occurrence of welding cracks is crucial. The following are some methods and measures for controlling welding cracks:
Appropriate Welding Techniques: Selecting the appropriate welding process and parameters can reduce welding heat input and thermal stress. Methods with low heat input, such as pulse welding and laser welding, can lower the temperature gradient and residual stress in the heat-affected zone of welding.
Preheating and Post-Weld Heat Treatment: Perform an appropriate preheat before welding to enhance material toughness and reduce thermal stress. After welding, conduct a suitable post-weld heat treatment, such as annealing or stress-relief heat treatment, to minimize residual stress and improve the toughness of the weld.
Choose suitable welding materials: Select welding materials with good toughness and crack resistance to minimize the occurrence of welding cracks. Select the appropriate welding materials based on the storage tank's operating conditions and requirements, such as low-alloy steel, stainless steel, etc.
Control Welding Process: Monitor and adjust parameters and operations during the welding process to minimize the risk of welding cracks. Pay attention to factors such as welding speed, current, voltage, and welding sequence to avoid overheating or rapid welding, thereby reducing the accumulation of thermal and residual stresses.
Inspection and Evaluation: After welding is completed, conduct non-destructive testing of the welds, such as ultrasonic testing, X-ray testing, etc., to assess welding quality and the presence of cracks. Detect and repair welding cracks promptly to ensure the integrity and safety of the weld joints.
It's important to note that controlling welding cracks is a complex process that requires considering multiple factors, such as materials, welding techniques, and operations. When welding low-temperature liquid storage tanks, it's advisable to consult with a welding engineer or relevant institutions for guidance to ensure both welding quality and tank safety.

Low-temperature liquid storage tanks offer the following features and advantages:
Features:
Low-Temperature Storage: Low-temperature liquid storage tanks can store low-temperature liquids (such as liquid nitrogen, liquid oxygen, etc.) at low temperatures, maintaining their liquid state. Liquid storage significantly enhances storage density and saves space.
Insulation: Low-temperature liquid storage tanks are equipped with special insulation materials and structural design, effectively reducing heat conduction and retention, maintaining a stable temperature for low-temperature liquids. This helps to minimize energy loss and liquid evaporation.
Safety: Low-temperature liquid storage tanks have excellent safety performance. The tanks are made with special materials and structural design, capable of withstanding low temperatures and high pressures. Additionally, the tanks are equipped with safety devices such as pressure relief valves and level alarms, ensuring safe operation and use.
Utilization Advantages:
High Purity Supply: Low-temperature liquid storage tanks can provide high-purity liquid substance supply. Through refrigeration and purification processing, high-purity liquid gases can be obtained to meet the demands of applications such as industry and scientific research.
Long-Term Storage: Low-temperature liquid storage tanks can store low-temperature liquids for extended periods, prolonging their service life. By controlling the temperature inside the tank and the performance of the insulation layer, the evaporation and oxidation of the liquid can be slowed down, maintaining its stability and purity.
Wide Range of Applications: Low-temperature liquid storage tanks are extensively used in various fields such as industry and scientific research. They can be used for storing liquid oxygen and providing oxygen supply; in the industrial sector, they are suitable for storing liquefied natural gas (LNG) and other process gases like liquid nitrogen; in scientific research, they are used for storing low-temperature experimental samples.
Environmental Protection and Energy Saving: Low-temperature liquid storage tanks enable effective storage and utilization of low-temperature liquids, reducing energy waste and environmental pollution. Storage of liquid substances
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