Shandong Zhongjie Special Equipment (formerly Heze Boiler Factory Co., Ltd.) was established in 2001, located at No. 2218 Jinnan Road, Economic and Technological Development Zone, Heze City. With a registered capital of 50 million yuan and total assets of 500 million yuan, the company operates seven business centers: boiler manufacturing, deep-freeze containers, pressure vessels, central air conditioning, engineering installation, international trade, and Internet of Things. It has three manufacturing sites on Jinnan Road, East Changjiang Road, and Bohai Road, covering a total area of 200,000 square meters, with the main workshop spanning 83,000 square meters. It currently employs 710 staff, including 247 engineering and technical personnel and 82 middle-level technical staff. In December 2016, it was recognized as a "High-Tech Enterprise" by the Science and Technology Department. In June 2021, it was named a "Specialized and New Enterprise in Shandong Province" by the Industry and Information Technology Department. In June 2022, it was identified as a "Gazelle Enterprise in Shandong Province" and in August 2022, as a "Specialized and New Small Giant Enterprise" by the Ministry of Industry and Information Technology.
When selecting welding materials for pressure vessels, several factors need to be considered:
Material Matching: The choice of welding material should match the base material of the pressure vessel to ensure the strength and corrosion resistance of the weld joint. Common matches include carbon steel welding material with carbon steel base material, stainless steel welding material with stainless steel base material, etc.
Strength requirements: Select welding material with adequate strength based on the design requirements and working conditions of the pressure vessel. The strength of the welding material 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 good corrosion resistance based on the working environment and medium of the pressure vessel. For example, pressure vessels operating in corrosive media may require welding materials made from stainless steel with enhanced corrosion resistance.
Welding Properties: The selection of welding materials should consider their welding properties, including penetration depth, weld bead shape, and crack resistance. The chosen materials must meet the requirements of the welding process and ensure the quality of the焊接 joints.
Relevant 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 conducted 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 specifications. Furthermore, manufacturers and suppliers often provide recommendations for welding material selection and technical support.

Liquid Argon Storage Tanks are designed for storing and transporting liquid argon, featuring the following characteristics:
Low-temperature retention performance: The liquid argon tank is equipped with special insulating materials and structural design, effectively maintaining the low temperature of liquid argon. The tank is internally lined with an insulating layer, reducing heat conduction and loss, ensuring long-term storage of liquid argon.
High-sealed performance: The liquid argon storage tank boasts excellent sealing properties, effectively preventing leakage and evaporation of liquid argon. The tank's valves, fittings, and seals, etc., are precision-designed and manufactured, ensuring reliable sealing performance.
High strength and corrosion resistance: The liquid argon tank is made of high-strength materials, capable of withstanding the high pressure and low temperature of liquid argon. Both the internal and external surfaces of the tank are specially treated for excellent corrosion resistance, capable of resisting corrosion and oxidation from liquid argon.
Safety Performance: The liquid argon storage tank is equipped with multiple safety protection measures, such as safety valves, pressure sensors, and level monitoring devices. These devices can monitor and control the tank's pressure, temperature, and level, ensuring the tank operates within a safe range.
Reliability and Stability: The liquid argon tank has been rigorously designed, manufactured, and tested, offering excellent reliability and stability. The tank can store and transport liquid argon stably for extended periods, ensuring that the quality and performance of the liquid argon are unaffected.
Easy to operate and maintain: The liquid argon storage tank is relatively simple to operate and maintain, equipped with valves and fittings that are easy to use. The maintenance work mainly includes regular inspections, cleaning, and repairs, which can extend the service life of the tank.
The performance characteristics of liquid argon tanks make them essential for the storage and transportation of liquid argon, widely used in scientific research, industry, and other fields. When using liquid argon tanks, it is crucial to strictly adhere to operational specifications and safety requirements to ensure safe usage.

When first using a liquid nitrogen tank, there are some precautions to consider to ensure safe and efficient operation. Here are some suggested precautions:
Safe Operation: Liquid nitrogen is a cryogenic liquid with strong refrigerating and asphyxiating effects. When handling liquid nitrogen tanks, appropriate personal protective equipment must be worn, such as insulated gloves and protective suits. Avoid direct contact with liquid nitrogen to prevent injury or other harm.
Ventilation Environment: Liquid nitrogen, upon evaporation, produces a significant amount of gas which may displace other gases, leading to a decrease in oxygen content in the air. Therefore, when using liquid nitrogen tanks, it is essential to ensure proper ventilation in the operating area to prevent oxygen deficiency.
Tank Inspection: Before first use of the liquid nitrogen tank, a thorough visual inspection and seal integrity check should be conducted. Ensure there are no obvious damages, leaks, or other safety hazards. If any issues are found, they should be repaired or the tank replaced promptly.
Filling Storage Tanks: Before the initial use of a liquid nitrogen storage tank, it's necessary to fill it with liquid nitrogen. During the filling process, follow the correct operational steps and safety procedures to ensure a safe and reliable filling. Also, pay attention to controlling the filling speed and pressure to avoid excessive tank pressure and temperature rise.
Labeling and Record Keeping: Prior to the initial use of the liquid nitrogen tank, relevant information should be labeled on the tank, such as the storage medium, capacity, manufacturing date, etc. It is also recommended to establish a usage record for the tank, including filling dates, filling amounts, usage details, etc., for future tracking and management.
Note that the use of liquid nitrogen tanks involves safety risks such as low temperatures and high pressures. Operators should receive training and strictly adhere to the relevant operational procedures and safety measures. If you are unfamiliar with the operation or have any doubts, it is recommended to consult with individuals or relevant institutions for guidance.

Liquid nitrogen storage tanks are equipment used for storing and transporting liquid nitrogen. To ensure safe operation, here are some common operational safety procedures for liquid nitrogen storage tanks:
Tank Installation: Tanks should be installed on a sturdy and level foundation, away from fire sources and flammable materials. Good ventilation around the tank is essential to prevent gas accumulation. The tank should maintain a safe distance from other equipment and buildings.
Liquid Nitrogen Filling: Use appropriate liquid nitrogen transfer equipment during filling to avoid direct contact with the liquid nitrogen. Monitor and control the flow and pressure of the liquid nitrogen during the filling process to prevent over-filling and excessive pressure in the storage tank.
Tank Pressure Control: Tanks should be equipped with pressure control devices to ensure internal pressure remains within a safe range. Regularly inspect and maintain these devices to ensure proper operation.
Leak Detection and Alarm Systems: Storage tanks should be equipped with leak detection and alarm systems to promptly detect and alert of any leakage. Regular inspections and maintenance of the leak detection equipment are necessary to ensure proper functioning.
Fire and Explosion Prevention Measures: A fire-resistant buffer zone should be established around the storage tank, keeping it away from fire sources and flammable materials. The tank itself should implement fire and explosion prevention measures, such as fire-resistant coatings and explosion-proof devices, to prevent fires and explosions.
Regular Inspections and Maintenance: Regularly inspect the tank's exterior, valves, and fittings to ensure they are undamaged. Conduct regular leak detection and pressure tests to ensure the tank's safety performance meets requirements.
Safety Training and Awareness Enhancement: Conduct safety training for operators to enhance their awareness and ability in the safe operation of liquid nitrogen tanks. Regularly hold safety training and drills to cope with emergencies.
Establish comprehensive management records and documents, including tank usage, inspection, and maintenance records. Regularly review and update these records to ensure safe management and maintenance of the tanks.
Note that the above are some common protective procedures, which may vary depending on the type of tank and application. When using liquid nitrogen tanks, operate according to relevant specifications and standards, and consult with experts to ensure safety and effectiveness.
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