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, and GB2/Class and GC2/Class pressure pipeline installation licenses, as well as an equipment and machinery installation contracting qualification. It is a member of the China Boiler and Water Treatment Association, the China Chemical Equipment Association, and the director unit 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 American ASME/U2 certification.
Standard specifications for liquid oxygen storage tanks may vary by region. Here are examples of common standards: - American Standards: The American National Standards Institute (ANSI) and the American Petroleum Institute (API) have issued a series of standards for liquid oxygen storage tanks, such as ANSI/API Standard 2510 "Design and Construction of Liquid Oxygen Tanks" and ANSI/API Standard 2510A "Supplement to the Design and Construction of Liquid Oxygen Tanks." - European Standards: The European Committee for Standardization (CEN) has issued a series of standards for liquid oxygen storage tanks, such as EN 13458 "Design and Manufacture of Liquid Oxygen Tanks" and EN 14015 "Design and Manufacture of Vertical Welded Steel Fixed Tanks." - Chinese Standards: The Standardization Administration of the People's Republic of China (SAC) has issued a series of standards for liquid oxygen storage tanks, such as GB/T 18442 "Design Specification for Liquid Oxygen Tanks" and GB/T 18443 "Construction and Acceptance Specification for Liquid Oxygen Tanks." These standards typically cover requirements for the design, manufacturing, installation, operation, maintenance, and inspection of liquid oxygen storage tanks. They encompass regulations on the tank's structure, materials, safety valves, insulation, leak control, fire protection measures, and safety distances to ensure the safety and reliability of liquid oxygen storage tanks. When designing, manufacturing, and using liquid oxygen storage tanks, it is essential to comply with applicable standards and regulations, and to cooperate with local regulatory authorities and personnel to ensure compliance with relevant safety requirements and laws.

Liquid nitrogen tanks are widely used in meat freezing. Here are several main applications of liquid nitrogen tanks in meat freezing:
Quick Freezing: Liquid nitrogen tanks can provide low temperatures for rapidly freezing meat to the desired temperature. Due to the low-temperature properties of liquid nitrogen, it can quickly lower the temperature of the meat in a short amount of time, effectively preserving the quality and texture of the meat.
Chilled Storage: Liquid nitrogen tanks are suitable for long-term freezing storage of meat products. Placing meat in a liquid nitrogen tank can maintain it at low temperatures, prevent the growth of bacteria and microorganisms, and extend the shelf life of the meat.
Chilled Transport: Liquid nitrogen tanks can be used for the freezing transportation of meat products. Placing meat in a liquid nitrogen tank maintains its低温 condition, ensuring the quality and freshness of the meat during transit.
Chilled Processing: Liquid nitrogen tanks can be used for meat freezing. By exposing meat to liquid nitrogen, the surface can be quickly frozen, forming a frost layer, thereby preserving the meat's moisture and nutritional content.
Chilled Processing: Liquid nitrogen tanks are suitable for meat freezing processing. Placing meat in liquid nitrogen makes it harder and more brittle, which is convenient for cutting, slicing, and processing.
Be mindful that when using liquid nitrogen tanks for meat freezing, it is crucial to adhere to the relevant safety operation procedures and guidelines. Ensure that operators are equipped with the necessary safety awareness and operational skills to prevent accidents. Additionally, consult the food safety authority for further guidance.

Proper management regulations for the use of low-temperature liquid storage tanks include the following aspects:
Tank Selection and Installation: Choose an appropriate low-temperature liquid storage tank and ensure it complies with relevant standards and regulations. The installation of the tank should be carried out by personnel and operated according to the manufacturer's instructions and requirements to ensure stability and safety.
Safety Operating Procedures: Establish and implement safety operating procedures for liquid storage tanks, including start-up, shutdown, filling, and venting operations. Operators must undergo training to understand the characteristics of liquid storage tanks, safety precautions, and emergency response measures.
Safety Equipment and Protective Measures: Tanks should be equipped with necessary safety devices, such as pressure sensors, safety valves, and leak detectors, to monitor and control the tank's pressure and temperature. Operators should also wear appropriate personal protective equipment, like insulating gloves and protective suits, to ensure their safety.
Regular inspections and maintenance: Conduct regular checks and maintenance on low-temperature liquid storage tanks, including inspecting the tank's appearance, sealing, and corrosion prevention measures. If any issues are found, they should be repaired or the tank replaced promptly to ensure proper operation and safety.
Waste Disposal: Abandoned low-temperature liquid storage tanks should be disposed of in accordance with relevant environmental protection regulations. The residual liquids in the abandoned tanks should be handled properly to prevent environmental pollution.
Tank Record and Tracking: Establish tank usage records, including filling dates, filling quantities, usage status, etc. Additionally, it is recommended to set up a tank tracking system for monitoring and managing tank usage and maintenance.
Here are some common management regulations for low-temperature liquid storage tanks. Specific regulations may vary by industry and region. When using low-temperature liquid storage tanks, comply with relevant laws and standards and establish appropriate management measures based on actual conditions.

The manufacturing process for the heads and cylinders of low-temperature storage tanks typically includes the following steps:
Material Preparation: Select suitable materials, such as low-temperature alloy steel or stainless steel, based on design requirements and specifications. Inspect and verify the materials to ensure they meet quality standards.
Sheet Cutting: Cut sheets according to design dimensions and shapes. Common cutting methods include flame cutting, plasma cutting, or laser cutting, etc.
Bending and forming: Cut板材are bent and formed to create shapes for heads and cylinders. Common forming methods include cold bending, hot bending, or hydraulic forming, etc.
Welding: The formed plates are welded together to create the structure of the head and cylinder. Common welding methods include manual arc welding, gas shielded welding, or laser welding, etc.
Weld seam treatment: Processes the weld seams after welding, such as sanding, polishing, or applying anti-corrosion coatings, to enhance the quality and appearance of the seams.
Inspection and Acceptance: Perform inspections and acceptances on the finished headers and cylinders to ensure their quality and compliance with design specifications. Common inspection methods include ultrasonic testing, radiographic testing, or liquid penetrant testing, etc.
Reinforcement and Support: As required, process and install reinforcement and support on the head and cylinder to enhance the structural strength and stability.
Surface Treatment: The heads and cylinders are treated for surface, including coatings like anti-corrosion painting, hot galvanizing, or polishing, to enhance their corrosion resistance and aesthetic quality.
It's important to note that the manufacturing process of low-temperature storage tanks must comply with relevant standards and regulations to ensure the quality and safety of production. During the manufacturing process, strict adherence to safety operation procedures and necessary protective measures should be taken to ensure the safety of the operators.
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