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 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.
Oxygen storage tanks and liquid oxygen storage tanks are equipment used for storing oxygen, but they have some differences: - Storage Form: Oxygen storage tanks are typically used for storing gaseous oxygen, while liquid oxygen storage tanks are for storing liquid oxygen. Oxygen is a gas at room temperature but becomes liquid when cooled to a low temperature for more efficient storage and use. - Storage Pressure: Oxygen storage tanks usually store high-pressure oxygen, with pressures generally around 200-300 bar. Liquid oxygen storage tanks store liquid oxygen at lower pressures, typically between 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 its gaseous form, utilizing compressed gas storage. Liquid oxygen storage tanks store oxygen in its liquid form, converting it to a liquid by cooling it below its boiling point. - Safety Requirements: Due to the highly oxidizing nature of liquid oxygen, liquid oxygen storage tanks require stricter safety standards in design and use. They usually 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 essential to follow applicable regulations, standards, and safety guidelines and to cooperate with local regulatory authorities and personnel to ensure the tanks' safety and reliability.

Tanks are specialized storage equipment that require regular inspections and maintenance to ensure safe operation. Here are common inspection methods for tanks:
Visual Inspection: Regularly inspect the exterior of the storage tank, checking for leaks, corrosion, deformation, cracks, and other issues. Pay special attention to the integrity of the tank's interfaces, welds, and valves.
Pressure Test: Conduct pressure tests to evaluate the tank's sealing performance and pressure resistance. Pressure gauges or pressure sensors can be used for the tank's pressure testing to ensure it can withstand the designed pressure.
Ultrasonic Testing: Ultrasonic testing is used to detect issues such as corrosion and cracks in tank walls. Scanning the tank with an ultrasonic detection instrument identifies potential defects and problems.
Magnetic Particle Inspection: This method is used to detect cracks and the quality of welds in tank walls. By applying magnetic particles to the tank surface and then observing for particle accumulation using a magnetic particle inspection instrument, it can be determined if there are any cracks or welding issues.
Environmental Monitoring: Regularly conduct environmental monitoring around the storage tanks, including checking gas concentrations and temperatures, to ensure the safety of the surrounding environment.
It's important to note that tank inspections should be conducted by a certified inspection agency or qualified inspectors. The frequency and methods of inspection should be determined based on the tank's usage, size, and relevant regulatory requirements. Regular inspections and maintenance can help identify potential issues early on, ensuring the safe operation of the tank.

The normal pressure range for liquid oxygen tanks typically falls between 2-5 bar. This range refers to the oxygen pressure inside the tank, which is necessary to maintain the liquid oxygen in its liquid state. The design and manufacture of liquid oxygen tanks must comply with relevant standards and regulations to ensure the tank can safely withstand this pressure range under normal operating conditions. It should be noted that the pressure in liquid oxygen tanks can be affected by various factors, such as the temperature of the liquid oxygen, the tank's design, and materials. In actual use, the normal pressure range of the tank should be determined based on specific tank design and usage requirements, and operations and maintenance should follow relevant laws and standards. Additionally, liquid oxygen tanks should be equipped with pressure control devices, such as pressure valves or relief devices, to ensure that the internal pressure of the tank remains within a safe range. These devices can automatically release gas when the pressure exceeds the set value, ensuring the tank's safety. Regular inspection and maintenance of these pressure control devices should be conducted when using liquid oxygen tanks to ensure their proper functioning.

The reasons why low-temperature liquid storage tanks have been at the peak in recent years are as follows:
Rising Demand: With the development of industries, scientific research, and other fields, there is a growing demand for cryogenic liquids. Cryogenic liquid storage tanks can effectively store and supply cryogenic liquids such as liquid oxygen, liquid nitrogen, and liquid gases, meeting the needs of various fields.
Technical Advancements: In recent years, the manufacturing technology and material technology for low-temperature liquid storage tanks have seen continuous improvements and innovations. The application of new insulating materials, advanced refrigeration systems, and safety control devices has enhanced the performance and safety of the tanks, making them more reliable and secure.
Environmental Awareness Enhancement: Low-temperature liquid storage tanks enable effective storage and utilization of low-temperature liquids, reducing energy waste and environmental pollution. Against the backdrop of enhanced environmental awareness, low-temperature liquid storage tanks, as an environmentally friendly and energy-saving equipment, have garnered more attention and application.
Emerging Application Fields: There is an increasing demand for cryogenic liquid storage tanks in emerging application fields. For instance, the application of liquid nitrogen in frozen food, biopharmaceuticals, and semiconductor manufacturing is becoming more widespread, which has driven the development of cryogenic liquid storage tanks.
Policy Support: The government has provided support and encouragement for the development of low-temperature liquid storage tanks. Through policy guidance and financial support, the industry has been promoted and expanded.
In summary, the peak popularity of low-temperature liquid storage tanks in recent years can be mainly attributed to increasing demand, technological advancements, heightened environmental awareness, the development of new application areas, and policy support. These factors have collectively spurred the rapid growth of the low-temperature liquid storage tank industry.
ZJ Special Equipment adheres to the great vision of "realizing employees' dreams, creating customer value, and striving for the prosperity and strength of our motherland," and is dedicated to the development of the green energy equipment industry. We offer products and services with high cost-performance to contribute to society!