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 and GC2/Class pressure pipeline installation licenses, as well as an equipment and machinery installation contracting qualification. 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. The company has also passed certifications for the ISO9001 Quality Management System, ISO14001 Environmental Management System, OHSAS18001 Occupational Health and Safety Management System, and the American ASME/U2 certification.
The reasons for not allowing liquid oxygen tanks to be left empty for extended periods are mainly as follows:
Evaporation Loss of Liquid Oxygen: Liquid oxygen has a low boiling point, and prolonged storage without use will cause continuous evaporation, resulting in a loss of liquid oxygen within the storage tank. The evaporation rate is relatively fast, with daily evaporation amounts potentially reaching several percent of the tank's capacity. Prolonged storage without use can lead to waste of liquid oxygen.
Safety Risk: Liquid oxygen is a strong oxidizer with high flammability and explosive properties. Prolonged empty storage of liquid oxygen tanks increases the likelihood of contact with the surrounding environment, thus raising the risk of accidental fires and explosions.
Risk of Storage Tank Damage: Long-term emptying of liquid oxygen storage tanks can lead to internal oxidation reactions, accelerating corrosion and damage to the tank. Tank damage can affect its sealing performance and structural integrity, increasing the risk of leaks and safety accidents.
Therefore, to ensure the safe storage and effective use of liquid oxygen, the liquid oxygen tank should be regularly maintained and serviced to avoid long-term idleness. When the tank is not in use, appropriate measures should be taken, such as sealing the tank and reducing the evaporation of liquid oxygen, to minimize losses and safety risks.

The process of using liquid oxygen storage tanks for pressure-regulated oxygen supply typically includes the following steps:
Liquid Oxygen Storage Tank Oxygen Supply System: Typically, a liquid oxygen storage tank oxygen supply system is installed, which includes a liquid oxygen storage tank, liquid oxygen transmission pipelines, and pressure regulating devices. The liquid oxygen in the storage tank is transported through the pipelines to the pressure regulating device.
Pressure Regulating Device: The pressure regulating device is used to convert high-pressure liquid oxygen into the required low-pressure oxygen. It typically includes a pressure regulator, a reducer, and a flowmeter. The pressure regulator is for controlling the oxygen pressure, the reducer is for reducing the high-pressure liquid oxygen to the required low pressure, and the flowmeter is for measuring the oxygen flow rate.
Oxygen Supply Pipeline: Low-pressure oxygen from the pressure-reducing device is transported through the pipeline to areas requiring oxygen supply, such as patient rooms, operating rooms, etc. The pipeline is typically made of stainless steel or plastic, offering excellent airtightness and corrosion resistance.
Oxygen Interface: Install oxygen interfaces at locations requiring oxygen supply, such as hospital beds or operating tables. Oxygen interfaces typically include an oxygen flow regulator and oxygen connectors, used for adjusting oxygen flow and connecting oxygen masks or tubes.
Oxygen Supply and Regulation: Control the pressure and flow of oxygen by adjusting the pressure regulating valve of the pressure regulator. Adjust the flow and concentration of oxygen according to the patient's needs, ensuring the patient receives an adequate oxygen supply.
Note that when using liquid oxygen storage tanks for pressure regulation and oxygen supply, it is essential to adhere to the relevant equipment operation and safety procedures. Operators must have the necessary training and skills to ensure the normal and safe operation of the oxygen supply system. Additionally, regular inspections and maintenance of the system's equipment and pipelines are required to ensure their proper functioning and safety.

Daily inspection of liquid nitrogen storage tanks primarily includes the following aspects:
Appearance Inspection: Check for any obvious damage, deformation, or corrosion on the tank's exterior, including the tank wall, valves, pipes, and joints.
Sealability Inspection: Verify the tank's sealing performance, including checking for leaks at valve and pipe connections, and ensuring the tank's exhaust valve and safety valve are functioning properly.
Pressure Check: Verify that the tank's pressure gauge is functioning properly and that the pressure is within the normal range to ensure the tank operates normally.
Level Check: Inspect the liquid nitrogen tank's level to ensure it is within the normal range, avoiding issues caused by levels that are too high or too low.
Insulation Layer Inspection: Check for any damage or detachment in the storage tank's insulation layer to ensure proper insulation and reduce evaporation losses of liquid nitrogen.
Leak Inspection: Check for signs of liquid nitrogen leakage around the storage tank, including frost, ice, or liquid nitrogen stains on the ground.
Safety Equipment Inspection: Verify that the safety equipment of the storage tank, such as leak detectors, alarm systems, and safety valves, are functioning properly to ensure the tank's safety.
Cleaning Inspection: Regularly clean the interior of the tank to remove accumulated impurities and dirt, maintaining the tank's cleanliness and hygiene.
The above outlines the daily inspection requirements for liquid nitrogen tanks. Specific inspection items should be adjusted and supplemented based on the tank's model, usage, and relevant regulations. During the inspection process, adhere strictly to operational procedures and safety standards to ensure the safe operation of the tank.

Liquid oxygen low-temperature storage tanks are primarily used for storing and supplying liquid oxygen, with their application methods varying based on specific requirements and scenarios. Here are some common application methods of liquid oxygen low-temperature storage tanks:
Applications: Liquid Oxygen Low-Temperature Storage Tanks are widely used in the field for cryogenic preservation of biological samples, cells, tissues, and vaccines. Institutions such as biopharmaceutical research organizations and biobanks utilize these storage tanks to store and protect these biological materials.
Experimental Research: Liquid Oxygen Low-Temperature Storage Tanks are used to provide low-temperature environments in scientific research and laboratories, for cryogenic preservation and experiments. These storage tanks play a crucial role in experimental research across various fields, including physics, chemistry, biology, and materials science.
Industrial Applications: Liquid Oxygen Low-Temperature Storage Tanks are used in industrial sectors for providing low-temperature cooling, serving processes such as metal processing, welding, and heat treatment. These tanks can achieve low temperatures, enabling metals to reach the required hardness and toughness during processing.
Food Industry: Liquid Oxygen Low-Temperature Storage Tanks are used in the food industry for freezing and refrigerating foods such as frozen meats, frozen fruits, and frozen seafood. The low temperature of liquid oxygen can quickly freeze foods, preserving their freshness and quality.
Liquid oxygen low-temperature storage tanks are used in the field for storing and supplying liquid oxygen as fuel. As a high-energy fuel, liquid oxygen is widely used in the propulsion systems of engines and devices.
During the operation of liquid oxygen low-temperature storage tanks, it is crucial to strictly adhere to relevant safety regulations and operational guidelines to ensure the safe operation and use of the tanks. Liquid oxygen is highly flammable, so fire prevention measures must be implemented when using liquid oxygen low-temperature storage tanks, and it is essential to ensure that there are no fire sources in the vicinity of the tank.
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