Shandong Zhongjie Special Equipment's main products include: fuel (gas) boilers, organic heat carrier boilers, biomass boilers, waste heat boilers, and other boiler products; vacuum insulation cryogenic pressure vessels such as LNG tanks, oxygen-nitrogen-argon tanks, and CO2 tanks; pressure vessel products such as denitrification engineering equipment, heat storage and energy storage equipment, and complete chemical equipment sets; central air conditioning and HVAC equipment such as ground (water) source heat pumps, air source units, water-cooled screw units, and air-cooled modular units. Planned products include large-scale energy centers, LNG transport vehicles, LNG tank containers, and other green energy equipment.
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 poor welding, improper material selection, or inadequate 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 tanks. These 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 reduce the tank's sealing performance, leading to leaks.
Improper operation: Failure to operate the storage tank in accordance with specifications, such as overfilling with liquid argon or excessive pressure, can lead to damage and leakage of the tank.
External Damage: The tank may sustain damage from external factors such as mechanical impacts or objects.

Liquid Oxygen Storage Tanks are equipment used for storing and supplying liquid oxygen. Liquid oxygen is a state where oxygen is cooled below its boiling point, turning it into a liquid form. Liquid oxygen storage tanks are typically designed with double or multi-layer structures, filled with insulating material in between to minimize heat transfer and evaporation of the liquid oxygen.
Liquid oxygen storage tanks feature the following characteristics:
High Purity: The liquid oxygen tanks store high purity liquid oxygen, typically exceeding 99.5% purity. This makes liquid oxygen tanks essential in applications requiring high purity oxygen, such as medical, industrial, and research fields.
Low Temperature: As the boiling point of liquid oxygen is -183°C, liquid oxygen storage tanks must have excellent insulation properties to maintain the low temperature of the liquid oxygen. Tanks are typically designed with double or multi-layer structures, filled with insulating material in between to reduce heat transfer and the evaporation of liquid oxygen.
High Pressure: Liquid oxygen storage tanks typically need to withstand high pressure to maintain their liquid state. The design and material selection of the tank must consider the pressure requirements of liquid oxygen to ensure the tank's safety and reliability.
Flammability: Liquid oxygen is highly flammable and supports combustion. Therefore, during the design and use of liquid oxygen storage tanks, fire prevention measures must be taken to ensure there are no ignition sources around the tank, and appropriate fire extinguishing equipment is provided.
High Density: Liquid oxygen has a higher density than gaseous oxygen, allowing liquid oxygen tanks to store more oxygen. This gives liquid oxygen tanks an advantage in applications requiring large amounts of oxygen supply, such as in the field.
The use of liquid oxygen tanks must strictly adhere to relevant safety regulations and operating guidelines to ensure safe operation and usage of the tanks.

During the degreasing process of high vacuum pipelines in low-temperature liquid storage tanks, the following steps can be taken:
Preparation: Ensure the cleanliness and readiness of the degreasing equipment and tools. Check the pipeline system's connections and seals to ensure there are no leaks.
Cleaning Piping: Use suitable cleaning agents and tools to clean the piping, removing surface dirt and grease. Methods such as mechanical brushing, high-pressure water jetting, or chemical cleaning can be employed.
De-greasing Process: Select an appropriate de-greaser and inject it into the pipeline system. The de-greaser can be an organic solvent or an alkaline solution, the choice depending on the pipeline material and type of dirt. Ensure the de-greaser thoroughly covers the inner wall of the pipeline and maintains a certain contact time.
Flush Pipeline: Drain the degreaser from the pipeline system and flush with clean water to remove any remaining degreaser and dirt. During the flushing process, high-pressure water or gas can be used for rinsing to ensure the cleanliness of the pipeline interior.
Drying Pipeline: Utilize drying equipment or ventilation systems to evaporate or exhaust moisture within the pipeline, ensuring the interior surface is dry. Drying can be accomplished with hot air or nitrogen.
Inspection and Testing: After degreasing, inspect and test the pipes to ensure their cleanliness and sealing. Visual inspection, pressure testing, or other relevant tests can be conducted.
Be mindful that when descaling high vacuum pipelines of low-temperature liquid storage tanks, adhere to relevant safety operation procedures and guidelines. Ensure operators are equipped with the necessary safety awareness and operational skills to prevent accidents.

Oxygen storage tanks and liquid oxygen storage tanks are equipment used for storing oxygen, but they have some distinctions: Storage Form: Oxygen storage tanks are typically used for storing gaseous oxygen, while liquid oxygen storage tanks are for storing liquid oxygen. Oxygen is in a gaseous state at room temperature but is cooled to a liquid state at low temperatures for more efficient storage and use. Storage Pressure: Oxygen storage tanks usually store high-pressure oxygen, with pressures around 200-300 bar. Liquid oxygen storage tanks store liquid oxygen at lower pressures, generally around 2-5 bar. Storage Capacity: Oxygen storage tanks usually have smaller capacities, suitable for personal or small-scale use. Liquid oxygen storage tanks have larger capacities, suitable for industrial or large-scale use. Storage Method: Oxygen storage tanks store oxygen in a gaseous form, through compressed gas storage. Liquid oxygen storage tanks store oxygen in a liquid form, converting it to a liquid state by cooling it below its boiling point. Safety Requirements: Due to the high oxidizing nature of liquid oxygen, liquid oxygen storage tanks require stricter safety requirements in design and use. Liquid oxygen storage tanks typically need to have good thermal insulation, leak control, and fire prevention measures to ensure safe operation. It should be noted that the specific design and specifications of oxygen storage tanks and liquid oxygen storage tanks may vary depending on different regions and application sites. When using these tanks, it is necessary to follow applicable regulations, standards, and safety guidelines, and cooperate with local regulatory authorities and personnel to ensure the safety and reliability of the tanks.
Our company highly values technological innovation and research and development. We have 1 municipal enterprise technology center in Heze City, with testing facilities for non-destructive testing, physical and chemical testing, welding testing, hydrostatic testing, and more. We are equipped with over 600 pieces of 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. Our key products such as welding for temperature and pressure vessels, biomass boiler emissions reduction, and waste heat recovery have been selected for multiple Shandong Provincial Department of Industry and Information Technology innovation projects, key projects in Shandong Province, and Heze City innovation and excellence projects. We have累计 obtained 27 authorized utility model patents, 16 authorized invention patents, 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 vessel processing technology using the international plasma arc + filler wire tungsten inert gas arc welding (PAW-GTAW) technique. This technology has been appraised as internationally competitive at the provincial level in deep cryogenic vessel manufacturing. Choose Zhongjieteqiang, and let's create brilliance together!