Shandong Zhongjie Special Equipment (formerly Heze Boiler Factory Co., Ltd.) was established in 2001, located at No. 2218 Jinnan Road, Development Zone, Heze City, with a registered capital of 50 million yuan and total assets of 500 million yuan. The company has 7 business centers: boilers, deep-freeze containers, pressure vessels, central air conditioning, engineering installation, international trade, and Internet of Things. It has three factory areas on Jinnan Road, East Changjiang Road, and Bohai Road, covering a total of 200,000 square meters, with the main workshop area being 83,000 square meters. It currently employs 710 people, including 247 engineers and technicians and 82 intermediate-level technical personnel. In December 2016, it was recognized as a "High-Tech Enterprise" by the Science and Technology Department. In June 2021, it was identified as a "Specialized and New Enterprise in Shandong Province" by the Ministry of Industry and Information Technology. In June 2022, it was recognized as a "Gazelle Enterprise in Shandong Province" and in August 2022, it was identified as a "Specialized and New Small Giant Enterprise" by the Ministry of Industry and Information Technology.
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: Determine the tank capacity based on the storage requirements and anticipated usage of LNG. The tank capacity should be sufficient to meet the expected storage duration and supply demands.
Material Selection: LNG tanks are typically made of low-temperature steel or nickel alloys to ensure corrosion resistance and strength in cold environments. 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 leakage control capabilities. The tanks must comply with relevant safety standards and regulations, 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, consideration must be given to its impact on the surrounding environment. The layout and design of the tank should comply with environmental protection requirements, minimizing the effects on the environment such as noise, vibration, and gas emissions.
Cost-Effectiveness: Considering the investment cost, operating cost, and lifecycle cost of the tank, choose a tank with a good 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 consideration of 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 operating conditions of liquid argon.
Regulation System: Select an appropriate regulation system to maintain stable pressure within the storage tank. The regulation 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 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 adjusting the gas flow and pressure within the storage tank. The control valve should have 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 storage tank.
Voltage Regulation System Control: Configure an appropriate control system for monitoring and regulating the operation of the voltage regulation system. The control system can enable automatic adjustments and alarm functions to ensure stable and safe pressure within the storage tank.
Be mindful that the voltage stabilization design should be tailored to specific engineering requirements and the operating conditions of the liquid argon storage tank, adhering to relevant local regulations, standards, and specifications. When designing and installing a voltage stabilization system, it's advisable to consult with engineers or relevant institutions for guidance to ensure the reliability and safety of the system.

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

The cooling process and precautions for liquid argon cylinders are as follows:
Cooling Process Analysis:
Clean the cylinder: Prior to cooling the liquid argon cylinder, ensure the interior is clean and free of impurities and contaminants. Use an appropriate cleaner for washing and rinse thoroughly.
Drainage and Exhaust: To empty the gas inside 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 tank, which can rapidly cool the air inside and the walls, thereby lowering the tank's temperature.
Allow to cool: Liquid nitrogen will gradually lower the temperature inside the tank through the process of heat conduction until it reaches the required low temperature.
Cautionary Notes:
Safety Protection: Necessary safety precautions must be taken during the cooling process of liquid argon cylinders. Liquid argon has low temperatures and high flammability, so operators should wear protective suits, gloves, and other personal protective equipment to ensure safe operation.
Fire Prevention Measures: Liquid argon is highly flammable; hence, during the cooling process of the liquid argon tank, it is crucial to ensure there are no ignition sources in the surrounding environment and to have appropriate fire extinguishing equipment on hand.
Temperature Control: During the cooling process of the liquid argon cylinder, it is necessary to control the cylinder's temperature to prevent overcooling or insufficient cooling. Temperature sensors and a temperature control system can be used to monitor and control the cylinder's temperature.
Insulation and Heat Retention: Liquid argon tanks are typically designed with double or multi-layer structures, filled with insulating material in the middle to minimize heat transfer and evaporation of liquid argon. Ensure the integrity and good insulating properties of the insulation layer.
Shandong Zhongjie Special Equipment, welcome customers to our factory for business discussions.