Shandong Zhongjie Special Equipment Co., Ltd. specializes in the following products: fuel (gas) boilers, organic heat carrier boilers, biomass boilers, waste heat recovery boilers, and other boiler products; vacuum insulation cryogenic pressure vessels such as LNG tanks, oxygen/nitrogen/argon tanks, and CO2 tanks; pressure vessel products including denitrification engineering equipment, heat storage and energy storage equipment, and complete chemical equipment; 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.
Standard specifications for liquid oxygen storage tanks may vary by region. Here are examples of some common standards: US Standards: The American National Standards Institute (ANSI) and the American Petroleum Institute (API) have issued a series of standards for liquid oxygen storage tanks, such as ANSI/API Standard 2510 "Design and Construction of Liquid Oxygen Storage Tanks" and ANSI/API Standard 2510A "Supplement to Design and Construction of Liquid Oxygen Storage Tanks." European Standards: The European Committee for Standardization (CEN) has issued a series of standards for liquid oxygen storage tanks, including EN 13458 "Liquid Oxygen Storage Tanks. Design and Manufacture" and EN 14015 "Vertical Welded Steel Fixed Tanks. Design and Manufacture." Chinese Standards: The Standardization Administration of the People's Republic of China (SAC) has issued a series of standards for liquid oxygen storage tanks, such as GB/T 18442 "Design Code for Liquid Oxygen Storage Tanks" and GB/T 18443 "Construction and Acceptance Code for Liquid Oxygen Storage Tanks." These standards typically cover requirements for the design, manufacture, installation, operation, maintenance, and inspection of liquid oxygen storage tanks. They encompass provisions for the tank's structure, materials, safety valves, insulation, leak control, fire protection measures, and safety distances to ensure the safety and reliability of the storage tanks. When designing, manufacturing, and using liquid oxygen storage tanks, it is essential to adhere to applicable standards and regulations, and to collaborate with local regulatory authorities and personnel to ensure compliance with relevant safety requirements and regulations.

Prior to cooling the liquid oxygen tank, the following prerequisites must be met:
Clean Tanks: Ensure the interior of the tank is clean, free of impurities and contaminants. The tank should be properly cleaned and flushed to maintain its internal cleanliness.
Drainage and Exhaust: Empty the gas from the storage tank and expel it through the exhaust system to reduce the gas content within the tank. This helps minimize the interference of the gas on the cooling process.
Safety Precautions: Prior to cooling the liquid oxygen tank, necessary safety measures must be taken. Liquid oxygen is highly flammable and has low-temperature properties. Operators should wear appropriate protective clothing, gloves, and other personal protective equipment to ensure safe operation.
Temperature Control: During the cooling process of the liquid oxygen storage tank, it is necessary to control the tank's temperature. Typically, low-temperature mediums such as liquid nitrogen are used to cool the tank, ensuring the temperature gradually drops below the boiling point of liquid oxygen.
Insulation and Heat Retention: Liquid oxygen tanks commonly employ double or multi-layer construction, filled with insulating material in between to minimize heat transfer and evaporation of the liquid oxygen. Ensure the integrity and good insulation of the insulating layer to enhance the cooling efficiency of the tank.
Under the aforementioned prerequisite conditions, cooling operations for liquid oxygen tanks can be performed. The cooling process must strictly adhere to relevant safety regulations and operational guidelines to ensure the safe operation and use of the tank.

Before using the liquid oxygen tank, the following preparations must be made:
Safety Inspection: Ensure the tank and its surrounding environment are safe. Check for any damage, leaks, or other safety hazards in the tank. Make sure there are no flammable substances or other hazardous items around the tank.
Tank Preparation: Inspect the tank's exterior, including the shell, welds, valves, and fasteners. Ensure there are no obvious damages or corrosion. Check that the insulating layer of the tank is intact and undamaged.
Liquid Oxygen Filling: Utilize liquid oxygen transfer equipment to fill the storage tank. Ensure the flow rate and pressure of liquid oxygen are maintained within safe limits during the filling process.
Pressure Control: Storage tanks should be equipped with pressure control devices to ensure internal pressure remains within safe limits. Inspect and adjust the pressure control devices to ensure proper operation.
Valve Operation: Inspect the tank's valves and fittings for proper operation. Ensure the valves open and close smoothly and reliably. Adjust the valves' open and closed states as needed.
Safety Equipment: Inspect the safety equipment around the storage tanks, such as fire isolation zones and alarm systems, to ensure they are functioning properly.
Operator Training: Ensure operators are proficient in the safe operation of liquid oxygen storage tanks.

During the operation of low-temperature storage tanks, it is indeed necessary to avoid the occurrence of wrinkling. Wrinkling refers to the phenomenon of creases or deformation on the tank wall, which may lead to a decrease in the structural strength of the tank, and even trigger leaks or ruptures.
Here are some precautions to avoid pressing on low-temperature storage tanks:
Tank Design: Select an appropriate tank design that can withstand the pressure and weight of low-temperature liquids. The tank's wall thickness and supporting structure should comply with relevant standards and regulations.
Material Selection: Choose materials suitable for low-temperature environments, with sufficient strength and low-temperature resistance. Common materials include low-temperature steel, stainless steel, etc.
Insulation Layer for Storage Tanks: The design and construction of the insulation layer must meet requirements to ensure effective reduction of heat conduction and temperature variation. The material and thickness of the insulation layer should be selected based on specific conditions.
Tank Operation: During the loading and unloading of liquids in the tank, avoid rapid or excessive fluid flow to minimize impact and stress concentration on the tank walls.
Tank Maintenance: Regularly inspect and maintain the structure and insulation of the tank to ensure it remains undamaged. Any abnormalities or damages should be repaired or replaced promptly.
Temperature Control: During the operation of low-temperature liquid storage tanks, strict control over the temperature difference between the inside and outside of the tank is required to avoid excessive temperature changes and thermal stress.
In summary, preventing creasing in low-temperature storage tanks hinges on proper design, material selection, the installation and maintenance of the insulation layer, and strict control over temperature variations. Regular inspections and maintenance are also crucial for ensuring the safe operation of the tanks.
Our company places great importance on technological innovation and research and development. We have 1 municipal-level 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. The key products we have developed, such as temperature and pressure vessel welding, biomass boiler emission reduction, and waste heat recovery, have successively been included in multiple Shandong Provincial Department of Industry and Information Technology scientific and technological innovation projects, key provincial projects, and Heze City innovation and excellence projects. We have cumulatively obtained 27 authorized utility models, 16 authorized inventions, participated in drafting 2 standards, 2 industry standards, and registered 15 trademarks. The technical team of our company, in collaboration with Professor Yajiang Li of Shandong University, has jointly developed deep cryogenic container processing technology using the internationally recognized plasma arc + wire filling tungsten inert gas arc welding (PAW-GTAW) technique. This technology has been appraised at the provincial level and has reached international standards in the field of deep cryogenic container manufacturing. Choose Zhongjie Special Equipment, let's create brilliance together!