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, as well as GB2 and GC2 class pressure pipeline installation licenses and equipment and mechanical installation contracting qualifications. It is a member of the China Boilers and Water Treatment Association, the China Chemical Equipment Association, and the council unit of the Shandong Equipment Manufacturing Association, and has passed ISO9001 Quality Management System, ISO14001 Environmental Management System, OHSAS18001 Occupational Health and Safety Management System certifications, and the American ASME/U2 certification.
Pressure Vessel Standards: Liquid carbon dioxide storage tanks are generally considered pressure vessels, and their design, manufacturing, and use should comply with the relevant pressure vessel standards. In China, common pressure vessel standards include GB150 "Steel Pressure Vessels" and GB18435 "Storage Tanks." Safety Standards: The use of liquid carbon dioxide storage tanks should adhere to the relevant safety standards and regulations. For instance, in China, the safe operation of liquid carbon dioxide storage tanks should follow standards such as GB50028 "Design Code for Petroleum and Chemical Enterprises" and GB50016 "Building Design Fire Prevention Code." Inspection and Testing Standards: The inspection and testing of liquid carbon dioxide storage tanks should comply with the corresponding standards and regulations. For example, regular inspections of liquid carbon dioxide storage tanks can refer to standards like GB/T 19638 "Code for Periodic Inspection of Pressure Vessels." Environmental Protection Standards: The use of liquid carbon dioxide storage tanks should comply with relevant environmental protection standards and regulations. For instance, in China, the exhaust emissions from liquid carbon dioxide storage tanks should meet standards such as "Emission Standards of Air Pollutants."

Common disadvantages of corrosion in pressure vessels during use include: Chemical media: Certain chemical media are corrosive, such as acids, bases, salts, etc. When these media come into contact with the vessel material, corrosion may occur. Humidity and moisture: High humidity environments or long-term exposure to moisture can lead to corrosion on the vessel surface, especially when oxygen is present, which may accelerate the corrosion rate. Rusting: When the protective layer on the vessel surface (such as coatings or plating) is damaged or destroyed, rusting may occur. Rusting can damage the vessel's surface and may lead to further corrosion. Electrochemical corrosion: When different metals or metals and non-metals come into contact, electrochemical corrosion cells may form, which can cause localized corrosion on the vessel surface. Welding defects: Defects such as weld pores and cracks may be introduced during the welding process, which may become starting points for corrosion. Corrosion can weaken the structural strength of the vessel, increasing the risk of leakage or bursting. Therefore, it is important to regularly inspect and maintain the corrosion-resistant layer, coating, or plating of pressure vessels. If corrosion issues are found, timely measures should be taken for repair or replacement of the damaged parts. Additionally, selecting appropriate materials and corrosion prevention measures, as well as proper operation and maintenance methods, can reduce the risk of corrosion in pressure vessels. Adhering to relevant safety operation procedures and standards ensures the safe operation of pressure vessels.

Carbon dioxide storage tanks are devices used for storing and transporting carbon dioxide gas, operating on the principles of pressure vessels and the physical properties of carbon dioxide. Pressure Vessel Principle: A carbon dioxide storage tank is a pressure vessel capable of withstanding internal gas pressure. Typically made of high-strength materials like steel, the tank's design and structure are engineered to withstand high pressures, ensuring safe storage and transportation of the gas. Compressed Gas Storage: Carbon dioxide is a gas at room temperature but can be compressed into a liquid under high pressure. Storage tanks use high pressure to compress the gas into a liquid state, achieving higher storage density. The liquid carbon dioxide occupies less volume, allowing for more gas storage. Level Control: Internal level control systems are installed in carbon dioxide storage tanks to monitor and control the level of liquid carbon dioxide. These systems usually include level sensors and control valves, ensuring the tank's level remains within a safe range. Pressure Control: Pressure control systems are also present inside the tank to monitor and control the gas pressure. These systems typically include pressure sensors and safety valves, ensuring the tank's pressure stays within safe limits, preventing damage or safety risks from excessive or low pressure. Through these principles, carbon dioxide storage tanks can safely store and transport carbon dioxide gas to meet the needs of various fields, such as food processing, beverage manufacturing, and firefighting. When using carbon dioxide storage tanks, it is necessary to follow relevant safety operation procedures and guidelines to ensure safe operation and use.

The primary reason for pre-cooling a carbon dioxide tank before use is to ensure that the carbon dioxide inside remains in a liquid state and maintains a stable temperature during storage and supply. The pre-cooling process typically involves the following steps: Tank Cooling: Before the tank is put into service, it must be cooled internally to a sufficiently low temperature to convert the carbon dioxide from a gas to a liquid. This can be achieved by injecting a cooling medium (such as liquid nitrogen) into the tank or by using an external cooling unit. Tank Pre-charging: After the tank has been cooled, liquid carbon dioxide must be pre-charged into the tank to fill it and maintain a certain pressure. The purpose of pre-charging is to provide sufficient carbon dioxide supply during storage and supply, and to keep the tank pressure stable. By pre-cooling, the liquid state of the carbon dioxide inside the tank is ensured, preventing premature evaporation and energy loss. Additionally, pre-cooling helps to lower the tank temperature in advance, reducing carbon dioxide evaporation and pressure fluctuations, thereby improving the tank's operational efficiency and safety. It should be noted that the specific methods and requirements for pre-cooling may vary depending on the tank design and application scenarios. When performing pre-cooling operations, it is necessary to follow relevant safety operation procedures and standards to ensure the safety and effectiveness of the operation.
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