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 a mechanical and electrical equipment installation contracting资质. 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, and has passed ISO9001 quality management system, ISO14001 environmental management system, OHSAS18001 occupational health and safety management system certifications, and the American ASME/U2 certification.
To prevent the hazards associated with liquid oxygen storage tanks, the following precautions can be taken:
Safety Operations and Management: Establish and enforce stringent safety operations and management systems, including proper use of storage tanks, operational procedures, and safety training. Ensure operators possess the necessary safety awareness and skills, adhere to operational procedures, and minimize operational errors and the likelihood of accidents.
Regular inspections and maintenance: Conduct regular checks and maintenance on liquid oxygen tanks, including visual inspections, pressure tests, and leak detection. Promptly identify and address any issues with the tanks to ensure their safety and reliability.
Safety devices and protective equipment: Tanks should be equipped with necessary safety devices such as pressure relief valves, level alarms, and protective equipment like firewalls and explosion-proof devices. These devices and equipment can take timely measures in abnormal situations to ensure the safety of the tank.
Fire Prevention Measures: Liquid oxygen has a high oxygen content, which is prone to causing fires. Therefore, fire prevention measures such as fire walls and fire extinguishers should be set up around the storage tanks to prevent the spread and expansion of fires.
Leakage Control and Emergency Response Plan: Establish a liquid oxygen storage tank leakage control and emergency response plan, including measures for leakage control, emergency response procedures, and evacuation plans. In the event of a leakage incident, the ability to take swift actions to control the leak and ensure personnel safety.
Training and Awareness Enhancement: Conduct regular safety training for operators of liquid oxygen tanks to enhance their safety awareness and emergency response capabilities. Strengthen safety

The primary reason for pre-cooling a liquid oxygen storage tank before use is to lower the internal temperature to below the boiling point of liquid oxygen, facilitating the conversion of oxygen to a liquid state.
The boiling point of liquid oxygen is -183°C; at room temperature, oxygen exists in a gaseous state. To store and supply liquid oxygen, the tank must cool the oxygen below its boiling point to convert it into a liquid form.
The pre-cooling process typically involves the following steps:
Clean Storage Tanks: First, the tank must be thoroughly cleaned to ensure there are no impurities or contaminants inside, to avoid affecting liquid oxygen.
Drainage and Exhaust: Empty the gas from the tank and expel it through the exhaust system to reduce the gas content within the tank.
Add Liquid Nitrogen: Inject liquid nitrogen into the storage tank, where its low temperature rapidly cools the air inside and the tank walls, thereby reducing the tank's temperature.
Wait for Cooling: The liquid nitrogen inside the storage tank will gradually lower the temperature of the tank through thermal conduction until it reaches below the boiling point of liquid oxygen.
The purpose of pre-cooling is to ensure that the temperature inside the storage tank is low enough to meet the storage and supply requirements for liquid oxygen. Pre-cooling can reduce the evaporation and loss of liquid oxygen, and also helps maintain the safety and stability of the tank.

When selecting low-temperature liquefied natural gas (LNG) storage tanks, the following factors should be considered:
Tank Types: Common LNG tank types include vertical fixed-roof tanks, spherical tanks, and horizontal tanks. Select the appropriate tank type based on specific application requirements and site conditions.
Tank Capacity: The tank capacity is determined based on the storage requirements of LNG and the estimated usage. The capacity should be sufficient to meet the projected storage cycle and supply needs.
Material Selection: LNG tanks are typically made of low-temperature steel or nickel alloy materials to ensure corrosion resistance and strength under low-temperature conditions. Select the appropriate material based on the tank's design pressure and temperature requirements.
Safety Performance: LNG tanks should possess excellent safety performance, including seismic resistance, fire resistance, and leak control capabilities. The tanks must comply with relevant safety standards and specifications, such as API 620, EN 1473, etc.
Maintenance and Inspection: Consider the maintenance and inspection requirements for the storage tank, including internal cleaning, coating protection, corrosion prevention measures, etc. The design of the tank should facilitate maintenance and inspection operations to ensure long-term reliable operation.
Environmental Impact: When selecting an LNG storage tank, consider its impact on the surrounding environment. The layout and design of the tank should comply with environmental protection requirements, minimizing noise, vibration, and gas emissions, etc., to reduce environmental impact.
Cost-effectiveness: Consider the investment, operational, and lifecycle costs of the tank to select one with a favorable cost-performance ratio.
需要注意的是，选型LNG储罐时应遵循相关的和地区的法规、标准和规范。此外，咨询的工程师或储罐制造商，以获取更详细和准确的选型建议。

The stable pressure design of a 15 cubic meter liquid argon tank requires considering the following aspects:
Tank Pressure: Determine the design pressure of the tank to meet the storage and supply requirements for liquid argon. Establish an appropriate design pressure range based on the characteristics and usage conditions of liquid argon.
Stabilization System: Choose an appropriate stabilization system to maintain stable pressure within the storage tank. The stabilization system typically includes components such as pressure regulators, pressure sensors, and control valves, which are used for monitoring and adjusting the pressure inside the tank.
Pressure Sensor: Install a pressure sensor to monitor the pressure changes inside the storage tank in real-time. The sensor transmits pressure signals to the pressure regulation system, allowing for timely adjustment of the control valve to maintain stable pressure within the tank.
Control Valve: Select an appropriate control valve for regulating the gas flow and pressure within the storage tank. The control valve should possess excellent regulating performance and stability to ensure the pressure within the tank remains within the set range.
Safety Valve: Install a safety valve to automatically release gas when the pressure inside the storage tank exceeds the set value, preventing overpressure. The safety valve should be selected and installed based on the design pressure and capacity of the tank.
Voltage Stabilization System Control: Equipped with a suitable control system for monitoring and regulating the operation of the voltage stabilization system. The control system can achieve automatic adjustments and alarm functions to ensure stable and safe pressure within the storage tank.
It is important to note that the design of the pressure-stabilizing system should be tailored to the specific engineering requirements and operating conditions of the liquid argon storage tank, adhering to relevant local regulations, standards, and specifications. When designing and installing the pressure-stabilizing system, it is recommended to consult with a qualified engineer or seek guidance from relevant institutions to ensure the reliability and safety of the system.
Our company highly values technological innovation and research and development design, boasting one municipal-level enterprise technology center in Heze City. We have established testing facilities for non-destructive testing, physical and chemical testing, welding testing, hydrostatic testing, etc. We are equipped with over 600 various instruments and 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 more. The key products and technologies we have developed, such as welding of temperature and pressure vessels, emission reduction of biomass boilers, and waste heat utilization, have successively been selected for multiple Shandong Provincial Department of Industry and Information Technology 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. Our technical team, in collaboration with Professor Yajiang Li of Shandong University, has developed deep cryogenic container processing technology using the internationally recognized plasma arc + filler wire 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 ZJ Special Equipment, and let's create brilliance together!