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 Standing Committee of the Shandong Equipment Manufacturing Association. The company has also passed ISO9001 Quality Management System, ISO14001 Environmental Management System, OHSAS18001 Occupational Health and Safety Management System certifications, and the American ASME/U2 certification.
The dimensions and structure of liquid oxygen tanks can vary depending on specific requirements and applications. Below are common dimensions and structures of liquid oxygen tanks:
Dimensions: The size of liquid oxygen tanks is typically determined by the capacity for storage or transportation. Common liquid oxygen tank capacities range from a few thousand to several hundred thousand liters.
Structure: The structure of the liquid oxygen storage tank primarily includes the inner shell, outer shell, insulation layer, and supporting structure, etc.
Inner Shell: The inner shell of a liquid oxygen tank is the part used to store liquid oxygen, typically made of stainless steel or aluminum alloy, offering excellent corrosion resistance and sealing properties.
Shell: The shell of a liquid oxygen storage tank is the external structure that protects the inner lining, typically made of carbon steel or stainless steel, offering sufficient strength and corrosion resistance.
Insulation Layer: The insulation layer of the liquid oxygen tank is used to reduce heat conduction and loss, maintaining the low temperature state of the liquid oxygen. Common insulation materials include polyethylene foam, glass fiber, and aerogel, etc.
Support Structure: The support structure for the liquid oxygen tank is designed to support and secure the inner shell and outer shell of the tank. Typically made of steel, the support structure offers adequate strength and stability.
The dimensions and structural design of liquid oxygen storage tanks must consider the properties of liquid oxygen, storage or transportation requirements, safety standards, and other factors. When using liquid oxygen storage tanks, strict adherence to relevant operational specifications and safety requirements is necessary to ensure safe usage.

Low-temperature industrial gas filling stations are equipment used to fill liquid low-temperature industrial gases (such as liquid oxygen, liquid nitrogen, liquid argon, etc.) into gas storage tanks. Here are some basic facts about low-temperature industrial gas filling stations:
Tank Type: Low-temperature industrial gas tanks typically use double-walled vacuum insulated tanks, with the inner wall for storing liquid gas and the outer wall for thermal insulation, to reduce heat transfer and the evaporation loss of the liquid gas.
Filling Equipment: Low-temperature industrial gas storage tank filling stations include liquid-gas filling pumps, filling pipelines, flowmeters, pressure sensors, and other equipment. Liquid-gas filling pumps are used to extract liquid gas from storage tanks or gas cylinders and fill it into the target storage tank.
Filling Process: The operational procedure at the filling station typically involves the following steps: Preparation (checking equipment, preparing filling medium), Equipment Connection (connecting filling pumps, pipelines, etc.), Equipment Activation (starting the filling pump, adjusting flow and pressure), Filling Operation (filling liquid gas into the target storage tank), Monitoring and Control (monitoring parameters such as pressure and flow during the filling process to ensure safety and quality), and Completion (shutting down equipment, cleaning the work area).
Safety Measures: Strict adherence to relevant safety operation procedures and standards is required during the operation of low-temperature industrial gas storage tank filling stations. Operators must receive training to understand the properties and safety precautions of liquefied gases. Additionally, filling stations should be equipped with safety equipment such as pressure sensors and safety valves to ensure the safety during the filling process.
Quality Control: Quality control is mandatory at the filling station during the filling process, involving monitoring parameters such as flow rate, pressure, and temperature of the filling medium to ensure accuracy and quality of the filling.
It's important to note that the operation of low-temperature industrial gas storage tank filling stations must be carried out by trained personnel and strictly adhere to the relevant operational procedures and safety measures. Additionally, the design and manufacturing of the filling stations should comply with applicable standards and regulations to ensure the safety and reliability of the equipment.

Potential leakage issues in liquid argon storage tanks may be caused by the following reasons:
Design or Manufacturing Defects: Deficiencies in the design or manufacturing process of the tank, such as loose welding, inappropriate material selection, and poor sealing, result in leakage issues with the tank.
Corrosion and Oxidation: Long-term exposure to low temperatures can cause corrosion and oxidation in liquid argon storage tanks. These processes can damage the tank's surface protective layer, leading to leakage issues.
Fatigue and stress cracking: Over time, due to temperature and pressure fluctuations, storage tanks may experience fatigue and stress cracking. 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 storage tank may sustain damage from external factors such as mechanical impacts or objects.

One of the common drawbacks of pressure vessels during use is corrosion. Corrosion refers to the reaction between the metal surface and chemical substances in the environment, leading to damage to the metal surface and thinning of the material. The following are common corrosion drawbacks of pressure vessels:
Pitting Corrosion: Pitting corrosion refers to localized pits or holes that appear on the surface of a metal. This type of corrosion is often caused by corrosive substances present in the local environment, such as acids, salts, etc.
Bacterial Corrosion: Bacterial corrosion is a phenomenon caused by microorganisms. These organisms can form a biofilm inside pressure vessels and produce acidic substances, leading to corrosion of the metal surface.
Punch Corrosion: Punch corrosion refers to the phenomenon of penetrating corrosion on the surface of metal. This type of corrosion usually occurs due to the damage or defect of the protective layer on the metal surface, allowing corrosive substances to come into direct contact with the metal.
Stress Corrosion Cracking: Stress corrosion cracking occurs when a metal surface is subjected to both stress and a corrosive environment, leading to the formation and propagation of cracks. This type of corrosion is commonly found in pressure vessels operating under high stress and corrosive conditions.
Corrosion can lead to material thinning and reduced strength in pressure vessels, even triggering severe consequences such as leaks or ruptures. Therefore, measures should be taken to address the corrosion issues in pressure vessels, including:
Regularly inspect and evaluate the corrosion status of pressure vessels, including methods such as visual inspections and non-destructive testing.
Implement corrosion prevention measures such as coating protection, cathodic protection, and selecting appropriate materials to minimize the occurrence and progression of corrosion.
Regularly clean and maintain pressure vessels to remove dirt and impurities that may cause corrosion.
Adhere to relevant safety regulations and operational guidelines to ensure the normal and safe operation of pressure vessels.
For severely corroded pressure vessels, repair or replacement may be required to ensure their safety and reliability.
ZJ Special Equipment adheres to the great vision of "realizing employees' dreams, creating value for customers, and striving for the prosperity and strength of our motherland," focusing solely on the development of green energy equipment. We dedicate products and services with high performance and affordability to society!