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, GC2 class pressure pipeline installation licenses, as well as equipment and machinery installation contracting qualifications. 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.
Under China's "Regulations for Safety Supervision of Pressure Vessel Technology," carbon dioxide storage tanks are classified as Category II pressure vessels. According to these regulations, pressure vessels are categorized as follows: - Category I pressure vessels: Those with working pressures of 10 MPa (MegaPascals) or more, such as steam boilers and pressure vessels. - Category II pressure vessels: Those with working pressures of 0.1 MPa (MegaPascals) or more but less than 10 MPa, such as air compressors and liquefied gas storage tanks. - Category III pressure vessels: Those with working pressures of 0.05 MPa (MegaPascals) or more but less than 0.1 MPa, such as storage tanks. - Category IV pressure vessels: Those with working pressures less than 0.05 MPa, such as gas cylinders. Based on this classification, carbon dioxide storage tanks typically have working pressures above 0.1 MPa, thus falling under Category II pressure vessels. It is important to note that specific classification criteria may vary due to different regional regulations and standards. When using and managing carbon dioxide storage tanks, it is essential to comply with the corresponding regulatory and standard requirements.

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 can withstand high pressure, ensuring the safe storage and transport 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 a higher storage density. Liquid carbon dioxide occupies less volume, allowing for more gas storage. Level Control: The tank is equipped with a level control system to monitor and control the level of liquid carbon dioxide. This system usually includes level sensors and control valves, ensuring the tank's level remains within a safe range. Pressure Control: The tank also features a pressure control system to monitor and control the internal gas pressure. This system typically includes pressure sensors and safety valves, ensuring the pressure remains within a safe range to prevent 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 fire extinguishing. When using carbon dioxide storage tanks, it is necessary to follow relevant safety operation procedures and guidelines to ensure safe operation and use.

Dry ice, a solid form of carbon dioxide, is a refrigerant that is directly converted from carbon dioxide gas under high pressure. It has several applications: Frozen food and pharmaceuticals: Dry ice is widely used in the transportation and storage of frozen food and pharmaceuticals. Due to its low temperature and rapid cooling speed, it effectively maintains the freshness and quality of food and medicines. Special effects and stage performances: Dry ice is also extensively used in special effects and stage performances. When it comes into contact with the heat in the environment, it rapidly converts into gas, producing a large amount of white smoke effect, creating a mysterious and dramatic atmosphere. Cleaning and disinfection: Dry ice can also be used for cleaning and disinfection. When it comes into contact with surfaces, the low temperature and the physical impact of the vaporization process can effectively remove dirt, bacteria, and viruses without leaving residues. Laboratories and scientific research: Dry ice also has applications in laboratories and scientific research. It can be used to freeze samples, prepare low-temperature experimental environments, and make cold traps and condensers, among other things. It should be noted that safety is a concern when using dry ice. It is important to avoid direct contact with the skin and eyes, and to not use it in confined spaces to prevent the accumulation of carbon dioxide and the risk of oxygen deficiency.

二氧化碳储罐的检验频率应根据当地的法规、标准和制造商的建议来确定。一般来说，以下几个因素会影响二氧化碳储罐的检验频率： 法规和标准要求：不同和地区可能有不同的法规和标准，规定了储罐的检验要求和频率。例如，美国的DOT标准要求液化气体储罐每5年进行一次外部检验和每10年进行一次内部检验。 制造商建议：储罐的制造商通常会提供关于检验频率的建议。这些建议基于储罐的设计、材料和使用寿命等因素，可以作为制定检验计划的参考。 使用环境和条件：储罐的使用环境和条件也会影响检验频率。例如，如果储罐暴露在腐蚀性环境中或经常受到机械应力，可能需要更频繁的检验。 一般来说，液化气体储罐的外部检验通常是通过目视检查、超声波检测、磁粉检测等方法进行的，以评估储罐的外部状况和可能存在的缺陷。内部检验可能需要排空储罐，并通过内部检查、厚度测量、焊缝检测等方法来评估储罐的内部状况。 重要的是，储罐的检验应由经过培训和有经验的人员进行，并严格按照相关的法规、标准和制造商的建议进行。定期的检验和维护可以确保储罐的安全性和可靠性，减少事故的风险。
ZJ Special Equipment adheres to the grand vision of "realizing employees' dreams, creating value for customers, and striving for the prosperity and strength of our motherland," and is dedicated to the development of the green energy equipment industry. We offer the society high-value products and services!