Shandong Zhongjie Special Equipment Co., Ltd. (formerly Heze Boiler Factory Co., Ltd.) holds an A-grade boiler manufacturing license and 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 a 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. During GMAW welding, the arc generates high temperatures in the welding area, which also causes oxidation reactions of oxygen and water vapor, leading to a decline in 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 results. 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 operation procedures and guidelines to ensure the safety and quality of the welding process.

Liquid carbon dioxide filling is the process of injecting liquid carbon dioxide into a storage tank. Here are some precautions to consider for carbon dioxide tank filling: - Safe Operation: Adhere to relevant safety operating procedures during carbon dioxide tank filling. 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 may lead to excessive tank pressure, increasing safety risks. - Filling Rate Control: Maintain a moderate filling rate to avoid both too fast and too slow filling. A rapid filling rate may cause excessive internal tank pressure, while a slow rate may result in extended filling times. - Temperature Control: Control the temperature of the liquid carbon dioxide during filling. High temperatures may cause rapid evaporation, and low temperatures may lead to solidification. - Pressure Control: Monitor and control the internal tank pressure during filling. Excessive pressure may cause tank rupture or leakage, while low pressure may result in incomplete filling. - Level Monitoring: Regularly monitor the tank's level during filling to ensure accurate level 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 tank pressure. The set pressure of the relief devices should meet relevant requirements and be inspected and maintained regularly. - Environmental Protection: Pay attention to environmental protection during filling to prevent leaks and contamination of liquid carbon dioxide. Take appropriate protective measures, such as using sealed connections and protective devices. - The above are some precautions for carbon dioxide tank filling. When performing filling operations, follow relevant safety regulations and standards, 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 is on the rise. Low-temperature liquid storage tanks are primarily used for storing liquid gases (LNG), liquid oxygen (LOX), liquid nitrogen (LIN), and other low-temperature liquid energy sources to meet the growing energy needs. 2. Greenhouse gas emission reduction: These tanks can store and transport liquid carbon dioxide (CO2) for carbon capture and storage (CCS) technology, reducing greenhouse gas emissions. As the focus on environmental protection and climate change grows, the demand for low-temperature liquid storage tanks in the CCS field is also increasing. 3. Industrial development needs: The application of low-temperature liquid storage tanks in the industrial sector is also expanding. For instance, in chemical, pharmaceutical, food and beverage industries, there is a need to store and transport low-temperature liquid raw materials or products, such as liquid nitrogen, liquid oxygen, and liquid ethylene. With the development of these industries, the demand for low-temperature liquid storage tanks is also increasing. 4. Technological advancement and innovation: In recent years, there have been continuous advancements and innovations in the design, manufacturing, and transportation of low-temperature liquid storage tanks. The application of new materials, optimization of tank structures, and improvements in safety control systems have made these tanks safer and more reliable, further driving their expansion to a peak. In summary, factors such as increased energy demand, greenhouse gas emission reduction, industrial development needs, and technological advancement and innovation have collectively driven the expansion of low-temperature liquid storage tanks to a peak in recent years. As related industries and technologies continue to develop,

Water tightness tests for carbon dioxide storage tanks are a common quality inspection method, used to verify the tank's sealing and pressure resistance. Below are the general steps for conducting a water tightness test on a carbon dioxide storage tank: Preparation: Ensure the tank interior is clean and the tank 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 other clean water sources. Ensure the water fills evenly, avoiding bubbles or dead spots. Applying Pressure: Use a pressure pump or other pressure device 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 in the tank, ensuring it is done slowly and evenly 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 operating procedures and standards when conducting water tightness tests to ensure safety and reliability during the process. Additionally, according to the tank's design and usage requirements, other types of tests can be conducted, such as air tightness tests, ultrasonic inspections, etc., to comprehensively assess the tank's quality and performance. Seek advice and guidance from experts.
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