Shandong Zhongjie Special Equipment (formerly Heze Boiler Factory Co., Ltd.) was established in 2001, located at No. 2218 Jinan Road, Economic 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 vessels, pressure vessels, central air conditioning, engineering installation, international trade, and the Internet of Things. It has three manufacturing sites on Jinan Road, East Yangtze 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 staff, including 247 engineers and technicians, and 82 intermediate-level technical personnel. 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, Focused, and New Enterprise in Shandong" by the Industrial and Information Technology Department. In June 2022, it was recognized as a "Gazelle Enterprise in Shandong" and in August 2022, it was identified as a "Specialized, Focused, and New Small Giant Enterprise" by the Ministry of Industry and Information Technology.
Liquid nitrogen tanks are widely used in various industries, primarily in the following aspects:
Industry: Liquid nitrogen tanks are used in the field for storing and supplying liquid nitrogen, which is essential for low-temperature freezing preservation of biological samples, cells, tissues, and vaccines. These tanks are widely used in biopharmaceutical research institutions and biobanks, among other organizations.
Experimental Research: Liquid nitrogen tanks are used to provide low-temperature environments in scientific research and laboratories, for cryogenic storage and cryogenic experiments. Liquid nitrogen tanks play a crucial role in experimental research across various fields such as physics, chemistry, biology, and materials science.
Metalworking Industry: Liquid nitrogen tanks are used in the metalworking and welding industries for providing low-temperature cooling, for processes such as metal cutting, welding, and heat treatment. Liquid nitrogen tanks can provide low temperatures, enabling metals to achieve the required hardness and toughness during processing.
Food Industry: Liquid nitrogen tanks are used in the food industry for freezing and refrigeration of foods, such as frozen meats, frozen fruits, and frozen seafood, etc. The low temperature of liquid nitrogen can quickly freeze foods, preserving their freshness and quality.
Semiconductor Industry: Liquid nitrogen tanks are used in semiconductor manufacturing and the electronics industry to provide low-temperature environments, for the freezing and preparation of semiconductor materials. The low temperature of liquid nitrogen can enhance the purity and performance of semiconductor materials.
The configuration of liquid nitrogen tanks typically includes the following aspects:
Vessel Structure: Liquid nitrogen tanks typically feature a double or multi-layered design, filled with insulating material in between to minimize heat transfer and evaporation of the liquid nitrogen. The tank material is usually stainless steel or aluminum alloy, offering excellent corrosion and low-temperature resistance.
Insulation Layer: The insulation layer of liquid nitrogen tanks typically employs multi-layered insulation materials such as polyethylene foam, glass fiber, and vacuum layers, to minimize heat transfer and evaporation of liquid nitrogen.
Temperature Control System: Liquid nitrogen tanks are typically equipped with a temperature control system to regulate the tank's temperature, maintaining the liquid state.

To ensure the quality of liquid oxygen tanks, the following measures can be taken:
选择可靠的供应商：选择有资质和经验的储罐制造商或供应商，确保其具备良好的声誉和可靠的质量管理体系。
Comply strictly with relevant standards and regulations: The design, manufacturing, and installation of liquid oxygen storage tanks should adhere to the applicable standards and regulations, such as standards, industry standards, or.
Quality Control and Inspection: Strict quality control and inspection are conducted throughout the manufacturing process, including material inspection, process monitoring, and finished product testing. Ensure that the materials, welding, and sealing of the storage tanks meet the required standards.
Comprehensive Quality Management System: Establish and implement a comprehensive quality management system, including quality control plans, quality inspection records, and quality training, to ensure each stage meets quality requirements.
Regular maintenance and inspection: Conduct regular maintenance and inspections on liquid oxygen tanks, including cleaning, coating protection, and anti-corrosion treatment, to extend the tank's service life and maintain its optimal operational condition.
Safe Operation and Management: Establish and implement a comprehensive safety and operational management system, including proper use of tanks, operational procedures, and safety training, to ensure safety and reliability during storage tank operation.
Regular inspections and evaluations: Conduct regular inspections and evaluations of liquid oxygen tanks, including visual inspections, pressure tests, leak detection, and as needed, non-destructive testing and material analysis, to ensure the quality and safety of the tanks.
By implementing these measures, the quality, reliability, and safety of the liquid oxygen storage tanks can be effectively ensured, meeting usage requirements and standards.

The liquid oxygen storage tank may deform during use. The following are common deformation defects of the liquid oxygen storage tank:
Elastic deformation: Liquid oxygen tanks may undergo elastic deformation when subjected to external pressure or temperature changes. This deformation is typically reversible, meaning the tank will return to its original shape once the external pressure is removed or the temperature returns to normal.
Plastic Deformation: When a liquid oxygen storage tank is subjected to significant external force or pressure, plastic deformation may occur. This deformation is irreversible, and the tank cannot return to its original shape. Plastic deformation can lead to changes in the tank's shape, dents, or warping, etc.
Hot Deformation: Liquid oxygen storage tanks may experience hot deformation when subjected to high temperatures or temperature fluctuations. Hot deformation can cause changes in the tank's shape, such as expansion or contraction.
Cold Deformation: Liquid oxygen tanks may undergo cold deformation when exposed to low temperatures or temperature changes. Cold deformation can cause changes in the tank's shape, shrinkage, or cracking.
These deformation defects may affect the structural integrity and safety of the liquid oxygen storage tank. Therefore, regular inspections and assessments of the tank's deformation are crucial to ensure its normal operation and safe use. If deformation defects are found in the tank, immediate repair or replacement measures should be taken to avoid further damage and safety risks.

The safe operation of low-temperature liquid storage tanks primarily involves the following key aspects:
Tank design and material selection: The tank design must comply with relevant safety standards and regulations, capable of withstanding the pressure and temperature of low-temperature liquids. Select appropriate materials, such as stainless steel, aluminum alloy, etc., to ensure the tank's corrosion resistance and low-temperature performance.
Insulation and Protection Measures: Low-temperature liquid storage tanks should be equipped with an effective insulation layer to minimize heat transfer and liquid evaporation. The selection and installation of the insulation layer should comply with relevant standards and requirements. Additionally, protective measures such as anti-freezing and explosion-proof measures should be implemented to ensure the safe operation of the tank.
Pressure Control and Safety Valves: Low-temperature liquid storage tanks should be equipped with a reliable pressure control system and safety valves to ensure that the pressure within the tank remains within a safe range. The pressure control system should be capable of promptly detecting and adjusting the pressure inside the tank, preventing risks from excessive or low pressure.
Leak and Fire Protection: Low-temperature liquids are highly flammable, so measures must be taken to prevent leaks and fires. Storage tanks and related pipelines should have good sealing properties and undergo regular inspections and maintenance to prevent leaks. Additionally, appropriate fire protection facilities and firefighting equipment should be provided to address fire risks.
Safe Operation and Training: Operators must undergo relevant safety training, familiarize themselves with the safety operating procedures for low-temperature liquid storage tanks and emergency response measures. Adhere to the correct operational steps to ensure safe operation.
Regular inspections and
Zhong Jie 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," focusing solely on the development of green energy equipment. We dedicate high-quality, cost-effective products and services to society!