Shandong Zhongjie Special Equipment (formerly Heze Boiler Factory Co., Ltd.) was established in 2001, located at No. 2218 Jinnan Road, Economic and Technological 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-freeze containers, pressure vessels, central air conditioning, engineering installation, international trade, and Internet of Things. It has three factory sites on Jinnan Road, East Changjiang Road, and Bohai Road, covering a total area of 200,000 square meters, with the main workshop spanning 83,000 square meters. The company currently employs 710 people, including 247 engineers and technicians and 82 intermediate-level technicians. 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 and New Enterprise of Shandong Province" by the Ministry of Industry and Information Technology. In June 2022, it was recognized as a "Gazelle Enterprise of Shandong Province" and in August 2022, as a "Specialized and New Small Giant Enterprise" by the Ministry of Industry and Information Technology.
Carbon dioxide tanks and liquid oxygen tanks are containers used for storing different gases; they have some distinct physical properties:
Physical State: Carbon dioxide is a gas at room temperature and pressure, requiring low temperatures and high pressures to convert to a liquid state. Liquid oxygen is a liquid at room temperature, and it must be cooled to a lower temperature to solidify.
Boiling and Freezing Points: The boiling point of carbon dioxide is -78.5°C, and its freezing point is -56.6°C. The boiling point of liquid oxygen is -183°C, and its freezing point is -218.8°C. The boiling and freezing points of liquid oxygen are significantly lower than those of carbon dioxide.
Density: Liquid oxygen has a high density, approximately 1.14 grams per cubic centimeter. Carbon dioxide has a lower density, around 0.00198 grams per cubic centimeter. The density of liquid oxygen is about 570 times that of carbon dioxide.
Pressure: Liquid oxygen has a higher pressure, typically ranging from tens to hundreds of MPa (Megapascals). Carbon dioxide has a lower pressure, usually within a few MPa (Megapascals).
Safety: Liquid oxygen has a high oxygen content, which is prone to cause fires and explosions. Carbon dioxide also poses asphyxiation and suffocation risks at certain concentrations.
It's important to note that carbon dioxide and liquid oxygen are both highly flammable and explosive substances. Strict adherence to relevant safety operating procedures and standards, as well as the implementation of necessary safety measures, is required to ensure the tank's safety and stability during storage and use.

Low-temperature liquid storage tanks are equipment designed for storing low-temperature liquids, commonly used for liquid oxygen, liquid nitrogen, liquid argon, and other low-temperature liquids. These liquids exist in a gaseous state at room temperature but are cooled to a liquid state under low temperatures for easier storage and use. These tanks are typically made of high-strength materials like stainless steel or aluminum alloy to withstand low temperatures and high pressures. They often have an insulating layer inside to minimize evaporation and maintain the low-temperature state. Applications of low-temperature liquid storage tanks include but are not limited to: They are widely used in rocket and spacecraft fuel and propulsion systems, such as liquid oxygen, liquid nitrogen, and liquid hydrogen tanks, for storing and supplying low-temperature liquids as fuel and oxidizers to propel the launch and operation of the vehicles. Industrial Production: Low-temperature liquid storage tanks are used in industrial production for storing and supplying low-temperature liquids like liquid oxygen, liquid nitrogen, and liquid argon. These liquids serve as coolants, raw materials for gas separation, and reactants in chemical reactions. Medical Applications: These tanks are used in the medical field to store and supply liquid oxygen for oxygen therapy, inhalation therapy, and operating rooms. Laboratory Research: In scientific research and laboratories, low-temperature liquid storage tanks provide low-temperature liquids as coolants and refrigerants. They are used for cooling laboratory equipment, material research, superconductivity, and low-temperature physics. In summary, low-temperature liquid storage tanks are widely applied in aerospace, industrial production, and laboratory research for storing and supplying low-temperature liquids to meet the needs of various fields.

Chongjie Special Equipment Co., Ltd. is a company engaged in the production of low-temperature liquid storage tanks. They offer low-temperature liquid storage tanks in various specifications and capacities, including liquid nitrogen tanks, liquid oxygen tanks, liquid argon tanks, and more.
The Zhongjie special-purpose low-temperature liquid storage tank is made with high-quality materials and advanced manufacturing techniques, ensuring the tank's strength and sealing integrity. The internal design incorporates special insulation materials and structure, effectively reducing liquid evaporation loss.
The low-temperature liquid storage tanks from Zhongjie are characterized by the following features:
High safety: Tanks are made of materials with excellent pressure resistance and sealing properties, capable of safely storing low-temperature liquids.
Low evaporation loss: Insulation materials and structural design used inside the tank effectively reduce liquid evaporation loss, enhancing the tank's economic efficiency.
A variety of specifications and capacities available: ZJET offers a range of specifications and capacities for low-temperature liquid storage tanks to meet different customer needs.
Customized Design: Zhongjie can offer customized design and manufacturing services based on the specific requirements of customers, to accommodate various application scenarios.
Volume Manufacturing Process: Zhong Jie's state-of-the-art manufacturing equipment and technical team ensure the quality and performance of the storage tanks.
In summary, our Zhongjie Special Equipment-manufactured low-temperature liquid storage tanks offer high safety, low evaporation loss, and a variety of specifications, making them suitable for storage and transportation needs of low-temperature liquids.

Daily inspections of liquid nitrogen tanks should include the following aspects:
Level Inspection: Regularly check the liquid nitrogen tank's level to ensure it stays within the normal range. Inspections can be conducted using level gauges or level scales, etc.
Pressure Check: Inspect the tank's pressure to ensure it's within the safe range. Pressure gauges or pressure sensors can be used for the check.
Insulation Layer Inspection: Verify that the tank's insulation layer is intact with no damage or detachment. The integrity of the insulation layer is crucial for reducing heat transfer and the evaporation of liquid nitrogen.
Leak Inspection: Check for signs of liquid nitrogen leakage around the storage tank, such as vapor mist, frost, or freezing. If a leak is detected, take immediate action to repair it.
Valve and pipeline inspection: Verify that the valves and pipelines of the storage tank are functioning properly without any gas leakage or blockages. Ensure the tightness and unobstructed flow of the valves and pipelines.
Safety Device Inspection: Check the safety devices of the storage tank, such as pressure relief valves, temperature sensors, and level alarms, to ensure they are functioning properly.
Tank External Cleaning: Regularly clean the external surface of the tank to remove dust, grime, and debris. Maintain the tank's appearance for easy inspection and maintenance.
Tank Records and Documentation: Timely record the inspection results and maintenance records of the tank, including liquid levels, pressure, insulation status, and leakage conditions. These records aid in monitoring the tank's operational status and identifying issues promptly.
The above lists the daily inspection items for liquid nitrogen storage tanks. Regularly performing these checks ensures the safe operation and efficient use of the tank. Additionally, adhere to relevant safety regulations and operational guidelines to ensure the safety of personnel and equipment.
Shandong Zhongjie Special Equipment, welcome customers to our factory for business discussions.