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 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.
Carbon dioxide is widely used as a shielding gas in metal welding processes during welding. The following are the main applications of carbon dioxide in welding: Gas Metal Arc Welding (GMAW): Carbon dioxide is commonly used as the shielding gas in the GMAW welding process. In GMAW welding, the arc generates high temperatures in the welding area, which can also cause oxidation reactions with oxygen and water vapor, leading to reduced weld quality. By injecting carbon dioxide gas into the welding area, a protective atmosphere is formed, preventing oxygen and water vapor from entering, thereby improving the quality and strength of the weld. Mixed Gas Shielding Welding (GMAW): Carbon dioxide is also often mixed with other gases (such as argon) to form mixed gas shielding welding. The use of mixed gases can adjust the arc stability, molten pool formation, and weld quality during the welding process, enhancing the welding effect. Gas Shielded Brazing: Carbon dioxide can also be used in the gas shielded brazing process. During brazing, the carbon dioxide gas provides a protective atmosphere, preventing oxidation and contamination in the brazing area, ensuring the quality of the brazed joints. Gas Shielded Cutting: Carbon dioxide can also be used in the gas shielded cutting process. In gas shielded cutting, by injecting carbon dioxide gas into the cutting area, a protective atmosphere is formed, preventing oxidation and contamination in the cutting area, improving the quality and speed of cutting. It is important to note that the application of carbon dioxide in welding needs to be adjusted and optimized according to specific welding materials, methods, and requirements. When using carbon dioxide for welding, it is necessary to follow relevant safety operating procedures and guidelines to ensure the safety and quality of the welding process.

The process of filling a carbon dioxide tank involves injecting liquid carbon dioxide into the tank. Here are some precautions to consider when filling a carbon dioxide tank: Safety Operation: Adhere to relevant safety procedures during the tank filling process. Operators should be trained to understand the tank's characteristics and safety considerations to ensure safe operations. Tank Capacity Control: Ensure that the filling process does not exceed the tank's rated capacity. Exceeding the rated capacity can lead to excessive pressure and increased safety risks. Filling Rate Control: Maintain a moderate filling rate to avoid both too fast and too slow filling. Excessive speed can cause high internal pressure, while slow speed can lead to extended filling times. Temperature Control: Control the temperature of the liquid carbon dioxide during filling. High temperatures can cause rapid evaporation, and low temperatures can lead to solidification. Pressure Control: Monitor and control the internal pressure of the tank during filling. High pressure can cause tank rupture or leakage, while low pressure may result in inadequate filling. Level Monitoring: Regularly monitor the tank's level during filling to ensure accurate measurements and avoid overfilling or underfilling. Pressure Relief Devices: The tank should be equipped with pressure relief devices, such as safety valves, to control internal pressure. The set pressure of these devices should meet relevant requirements and be regularly inspected and maintained. Environmental Protection: Be mindful of environmental protection during the filling process, avoiding leaks and pollution of liquid carbon dioxide. Take appropriate protective measures, such as using sealed connections and protective devices. The above are some precautions to consider when filling a carbon dioxide tank. Follow relevant safety regulations and standards during filling operations, and consult with experts to ensure safety and effectiveness.

In recent years, the expansion of low-temperature liquid storage tanks has reached its peak for several reasons: 1. Increased energy demand: With economic growth and population increase, the demand for energy has surged. Low-temperature liquid storage tanks are primarily used for storing liquefied natural gas (LNG), liquid oxygen (LOX), and liquid nitrogen (LIN), among other cryogenic fluids, to meet the growing energy needs. 2. Greenhouse gas reduction: These tanks can store and transport liquid carbon dioxide (CO2) for carbon capture and storage (CCS) technology, helping to reduce greenhouse gas emissions. As environmental protection and climate change concerns rise, the demand for low-temperature liquid storage tanks in the CCS field also increases. 3. Industrial development needs: The application of low-temperature liquid storage tanks in the industrial sector is also on the rise. For instance, in industries such as chemicals, pharmaceuticals, food and beverages, there is a need for storing and transporting cryogenic raw materials or products like liquid nitrogen, oxygen, and ethylene. As these industries develop, so does the demand for low-temperature liquid storage tanks. 4. Technological advancement and innovation: In recent years, the design, manufacturing, and transportation technology for low-temperature liquid storage tanks has seen continuous advancements and innovations. The application of new materials, optimization of tank structures, and improvements in safety control systems have made these tanks safer and more reliable, further propelling their expansion to a peak. In summary, factors such as increased energy demand, greenhouse gas reduction, industrial development needs, and technological advancement and innovation have collectively driven the peak expansion of low-temperature liquid storage tanks in recent years. As related industries and technology continue to develop,

Water pressure testing of CO2 storage tanks is a common quality inspection method used to verify the tank's sealing and pressure resistance. Below are the general steps for conducting a water pressure test on CO2 storage tanks: Preparation: Ensure the tank is clean inside and is empty. Check the tank's valves, pipes, and connections to ensure they are sealed properly. Filling with Water: Fill the tank with water, using tap water or another clean water source. Ensure even water filling to avoid bubbles or dead spots. Applying Pressure: Use a pressure pump or other pressure equipment to gradually increase the water pressure until it reaches the predetermined test pressure. The test pressure is typically determined based on the tank's design requirements and relevant standards. Maintaining Pressure: After reaching the test pressure, hold it for a period, usually 15-30 minutes. During this time, observe for any leakage from the tank, and check for leaks at the valves and connections. Releasing Pressure: Release the water pressure inside the tank, ensuring a slow and even release to avoid sudden pressure release causing shock. Inspection and Evaluation: After pressure release, inspect the tank's exterior and interior for any leakage. Evaluate the test results to ensure the tank's sealing and pressure resistance meet requirements. It is important to follow relevant safety operation procedures and standards when conducting water pressure tests to ensure safety and reliability during the process. Additionally, based on the tank's design and usage requirements, other types of tests can be conducted, such as gas pressure testing, ultrasonic testing, etc., to comprehensively assess the tank's quality and performance. Seek advice and guidance from a consultant.
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