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, 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 the ISO9001 Quality Management System, ISO14001 Environmental Management System, OHSAS18001 Occupational Health and Safety Management System certifications, and the American ASME/U2 certification.
The liquid oxygen tank may deform during use. The following are common deformation defects in liquid oxygen tanks:
Elastic deformation: Liquid oxygen storage tanks may undergo elastic deformation when subjected to external pressure or temperature changes. This deformation is typically reversible, meaning the tank will return to its original shape upon the removal of external pressure or the normalization of temperature.
Plastic Deformation: When a liquid oxygen tank is subjected to significant external force or pressure, it may undergo plastic deformation. This deformation is irreversible, and the tank cannot return to its original shape. Plastic deformation can cause changes in the tank's shape, such as indentation or warping.
Hot Deformation: Liquid oxygen tanks may experience hot deformation when subjected to high temperatures or temperature changes. Hot deformation can lead to changes in the tank's shape, expansion, or contraction.
Cold Deformation: Liquid oxygen tanks may undergo cold deformation when subjected to low temperatures or temperature changes. Cold deformation can cause the tank to change shape, shrink, or crack.
These deformation defects may affect the structural integrity and safety of liquid oxygen tanks. Therefore, regular inspection and assessment of the deformation of liquid oxygen tanks are crucial to ensure their normal operation and safe use. If deformation defects in the tank are found, prompt repair or replacement measures should be taken to avoid further damage and safety risks.

Proper installation of the liquid oxygen tank safety valve is a crucial step to ensure the safe operation of the liquid oxygen tank. Here are the installation steps for the liquid oxygen tank safety valve:
Select the appropriate safety valve: Choose a safety valve that matches the design pressure and flow requirements of the liquid oxygen storage tank. Ensure that the rated pressure and flow of the safety valve meet the tank's specifications and comply with relevant safety standards and regulations.
Valve Installation Location: Select an appropriate location for installing the safety valve. Typically, the safety valve should be mounted on the top or side of the liquid oxygen tank to allow for timely pressure release in case of overpressure situations.
Preparation for installation interface: Prepare the corresponding interfaces based on the connection method of the safety valve. This may include welding interfaces, threaded interfaces, or flange interfaces, etc. Ensure the tightness and firmness of the connections.
Install the safety valve: Mount the safety valve onto the prepared interface. Follow the installation instructions for the safety valve to ensure proper connection and tightness.
Adjustment and Testing: After installation, adjust and test the safety valve according to its requirements. Ensure the opening and closing pressures of the safety valve meet the design specifications, and conduct a leak test to ensure its sealing.
Identification and Record: Label the safety valve with relevant information such as rated pressure, flow rate, and installation date. Additionally, record the installation details and test results of the safety valve for future reference and maintenance.
When installing the liquid oxygen storage tank safety valve, it is imperative to adhere to the relevant safety regulations and operation guidelines. If you lack the necessary experience and knowledge, it is advisable to seek assistance and guidance from experts to ensure the correct installation and reliable operation of the safety valve.

When selecting welding materials for pressure vessels, several factors should be considered:
Material Matching: The selection of welding materials should match the base material of pressure vessels to ensure the strength and corrosion resistance of the weld joints. Common material matches include carbon steel welding materials with carbon steel base materials, stainless steel welding materials with stainless steel base materials, and so on.
Strength Requirements: Select welding materials with sufficient strength based on the design requirements and working conditions of the pressure vessel. The strength of the welding materials should match the base material to ensure that the strength of the weld joint does not become a weakness of the vessel.
Corrosion Resistance: Select welding materials with excellent corrosion resistance based on the working environment and medium of the pressure vessel. For instance, pressure vessels operating in corrosive media may require welding materials made of stainless steel with superior corrosion resistance.
Welding Properties: The selection of welding materials should consider their welding properties, including penetration depth, weld bead shape, and crack resistance. The choice of welding materials should meet the requirements of the welding process and ensure the quality of the weld joints.
Relative Standards and Regulations: When selecting welding materials, refer to relevant standards and regulations, such as the ASME Boiler and Pressure Vessel Code, AWS (American Welding Society) standards, etc. These standards and regulations provide guidance and requirements for the selection of welding materials.
It is important to note that the selection of welding materials should be done by a welding engineer or a qualified welder. They can choose the appropriate materials based on specific application requirements, working conditions, and safety standards, in conjunction with relevant regulations and specifications. Additionally, manufacturers and suppliers often provide advice on material selection and technical support.

The stable pressure design of a 15 cubic meter liquid argon storage tank should consider 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: Select 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 to monitor and adjust the pressure inside the tank.
Pressure Sensor: Install a pressure sensor for real-time monitoring of pressure changes within the storage tank. The sensor transmits pressure signals to the pressure stabilization system to promptly adjust the control valve's opening, maintaining stable pressure inside the tank.
Control Valve: Select an appropriate control valve for regulating 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 storage 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 is capable of automatic adjustment and alarm functions to ensure stable and safe pressure within the storage tank.
Note that the design of the voltage regulation system should be tailored to the specific engineering requirements and operational conditions of the liquid argon storage tank, adhering to relevant local regulations, standards, and specifications. When designing and installing the voltage regulation 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.
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