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 has seven business centers: boilers, deep-freezing 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 people, including 247 engineers and technicians and 82 intermediate-level technicians. 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, as a "Specialized and New Small Giant Enterprise" by the Ministry of Industry and Information Technology.
When filling liquid carbon dioxide tanks, attention should be given to the following aspects: Safety Operation: During the filling process, it is mandatory to follow relevant safety operation procedures and standards. Operators must receive training to understand the operational requirements and safety measures of the filling equipment and operate strictly according to the procedures. Tank Inspection: Before filling, the tank must be inspected to ensure its integrity and safety. Check the tank's appearance, sealing, valves, and pipe connections, and address any abnormalities or damages promptly by repairing or replacing them. Filling Equipment: Select appropriate filling equipment that meets relevant standards and requirements. The filling equipment should have a safe and reliable design and operational functionality to ensure the safety and efficiency of the filling process. Filling Speed Control: Controlling the filling speed is crucial. Excessive filling speed can lead to elevated tank pressure, increasing safety risks. Adjust the filling speed according to the tank's capacity and design requirements to ensure safe filling. Pressure Control: The tank's pressure must be strictly controlled during the filling process. The filling equipment should be equipped with pressure sensors and safety valves to ensure the internal pressure of the tank remains within a safe range. Leak Protection: Ensure the sealing of valves and pipes during the filling process to prevent carbon dioxide leakage. Regularly inspect and replace seals, and promptly address any leakage issues. Monitoring and Recording: Real-time monitoring and recording of key parameters, such as pressure, temperature, and level, should be conducted during the filling process. This aids in the timely detection of abnormalities and the implementation of corresponding adjustments and treatments. Note that filling carbon dioxide tanks should be carried out by qualified operators who follow relevant safety operation procedures and standards. Seek advice and guidance from experts.

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 water pressure testing on CO2 storage tanks: Preparation: Ensure the tank is clean inside and is empty. Check the valves, pipes, and connection points of the tank to ensure they are sealed properly. Filling with Water: Fill the tank with water, using tap water or another clean source. Ensure even water filling to avoid 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 connection points. Releasing Pressure: Release the water pressure in the tank, ensuring a slow and even release to avoid sudden pressure release causing shocks. 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 the requirements. It is important to follow relevant safety operating procedures and standards when conducting water pressure tests to ensure safety and reliability during the process. Additionally, other types of tests can be conducted based on the tank's design and usage requirements, such as gas pressure tests, ultrasonic inspections, etc., to comprehensively assess the tank's quality and performance. Seek advice and guidance from knowledgeable professionals.

When using carbon dioxide tanks, attention should be given to the following aspects: - Safe Operation: Operators must undergo training to understand the characteristics, operational requirements, and safety measures of carbon dioxide tanks. Adhere to relevant safety operation procedures and standards to ensure operational safety. - Tank Inspection: Regularly inspect the tank's appearance, sealing, valves, and pipeline connections before use. If any anomalies or damages are found, they should be repaired or replaced promptly. - Tank Placement: Place the tank in a well-ventilated, dry, and fire-free area. Avoid direct sunlight and high temperatures to prevent overheating. - Leak Prevention: Ensure that the tank's valves and pipeline connections are sealed properly to prevent carbon dioxide leaks. Regularly check and replace seals, and address leaks promptly. - Pressure Control: The internal pressure of the tank should be within a safe range. Check the tank's pressure gauge and safety valve before use to ensure proper operation. Avoid excessive or low pressure to prevent accidents. - Fire Prevention: Carbon dioxide is flammable, so fire prevention measures should be observed during use. Smoking, open flame operations, or placing flammable materials near the tank are prohibited. - Exhaust Emission: Properly dispose of exhaust gases produced during the use of carbon dioxide tanks to avoid CO2 buildup in enclosed spaces, which can lead to asphyxiation and safety risks. - Emergency Response Plan: Develop and implement an emergency response plan, including the handling of leaks, evacuation procedures, and first aid measures. Operators should be familiar with the plan and conduct drills regularly. Note that carbon dioxide tank operation should be performed by trained personnel following relevant safety operation procedures and standards. Seek advice and guidance from knowledgeable experts.

Carbon dioxide is widely used as a protective 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 protective 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 Metal Arc Welding (GMAW): Carbon dioxide is also often mixed with other gases (such as argon) to form mixed gas protective welding. The use of mixed gases can adjust the arc stability, melt 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 should be noted that the application of carbon dioxide in the welding process 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.
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