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, B-grade boiler installation, and GB2/Class, GC2/Class pressure pipeline installation licenses, as well as 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理事 member of the Shandong Equipment Manufacturing Association. The company has also passed certifications for the ISO9001 Quality Management System, ISO14001 Environmental Management System, OHSAS18001 Occupational Health and Safety Management System, and the U.S. 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 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 Industry 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, and salts. 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. Particularly in the presence of oxygen, the corrosion rate may increase. - Rusting: When the protective layer on the vessel surface (such as coatings or plating) is damaged or destroyed, the vessel may experience rusting. Rusting can damage the vessel's surface and may lead to further corrosion. - Electrochemical corrosion: When different metals or metal and non-metallic materials come into contact, electrochemical corrosion cells may form. This type of corrosion can cause localized corrosion on the vessel surface. - Welding defects: Defects like weld porosity and cracks may be introduced during the welding process. These defects can become starting points for corrosion. Corrosion weakens the structural integrity of the vessel, increasing the risk of leakage or rupture. Therefore, regular inspection and maintenance of the corrosion protection, coatings, or plating on pressure vessels are important. If corrosion issues are detected, timely measures should be taken to repair or replace damaged parts. In addition, 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 equipment 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 the pressure of the internal gas. It is 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, achieving higher storage density. The liquid carbon dioxide occupies less volume, allowing for more gas to be stored. Level Control: The tanks are equipped with level control systems for monitoring and controlling 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: The tanks also have pressure control systems for monitoring and controlling the internal gas pressure. These systems typically include pressure sensors and safety valves, ensuring the pressure remains within a safe range to prevent damage or safety risks due to 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 fire extinguishing. When using carbon dioxide storage tanks, it is essential to follow relevant safety operating procedures and guidelines to ensure safe operation and use.

The primary reason for pre-cooling a CO2 storage tank before use is to ensure that the CO2 inside remains in a liquid state and maintains a stable temperature during storage and supply. The pre-cooling process typically includes the following steps: 1. Tank Cooling: Before the tank is put into service, it must be cooled internally to a sufficiently low temperature to convert the CO2 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 device. 2. Tank Pre-filling: After the tank is cooled, liquid CO2 must be pre-filled into the tank to fill it and maintain a certain pressure. The purpose of pre-filling is to provide sufficient CO2 supply during storage and supply and to keep the tank pressure stable. Through pre-cooling, the liquid state of the CO2 inside the tank is ensured, preventing premature evaporation and energy loss. Additionally, pre-cooling helps to lower the tank's temperature in advance, reducing CO2 evaporation and pressure fluctuations, thereby improving the tank's operational efficiency and safety. It should be noted that the specific operation methods and requirements for pre-cooling may vary depending on different tank designs and usage scenarios. When conducting pre-cooling operations, it is essential to follow relevant safety operation procedures and standards to ensure the safety and effectiveness of the operation.
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