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 7 business centers: boilers, deep-freeze containers, pressure vessels, central air conditioning, engineering installation, international trade, and the 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. It currently employs 710 staff, 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 in Shandong Province" by the Ministry of Industry and Information Technology. In June 2022, it was named a "Gazelle Enterprise in Shandong Province" and in August 2022, it was recognized as a "Specialized and New Small Giant Enterprise" by the Ministry of Industry and Information Technology.
Routine inspection of liquid nitrogen storage tanks involves regular checks and maintenance to ensure safe operation and efficient use. Here is a common-sense introduction to the inspection of liquid nitrogen storage tanks:
Appearance Inspection: Regularly inspect the exterior of the tank, including the tank body, insulation layer, valves, and pipelines, etc. Pay attention to any cracks, corrosion, wear, or other damage. Also, check if the insulation layer is intact, without any damage or detachment.
Level Check: Regularly inspect the liquid nitrogen tank's level to ensure it remains within the normal range. This can be done using a level gauge or a level scale, among other equipment.
Pressure Check: Inspect the tank's pressure to ensure it is within the safe range. Devices such as pressure gauges or pressure sensors can be used for the inspection.
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 tank's valves and pipelines are functioning properly without any leaks or blockages. Ensure the tightness and unobstructed flow of the valves and pipelines.
Safety Device Inspection: Examine the safety devices of the storage tank, such as pressure relief valves, temperature sensors, and liquid level alarms, to ensure their proper operation.
Maintenance Records: Timely record the inspection results and maintenance records of the storage tank, including liquid level, pressure, insulation layer condition, leakage status, etc. These records help monitor the tank's operational status and identify issues promptly.
It's important to note that the inspection of liquid nitrogen tanks should adhere to relevant safety regulations and operational guidelines. Liquid nitrogen is highly flammable at low temperatures, so operators must wear appropriate personal protective equipment and ensure the operation area is free of any ignition sources. Regular inspections help identify issues promptly and allow for corrective measures, ensuring the safe and efficient operation of the tank.

When selecting low-temperature liquefied natural gas (LNG) storage tanks, the following factors should be considered:
Tank Types: Common LNG tank types include vertical fixed-roof tanks, spherical tanks, and horizontal tanks. Select the appropriate tank type based on specific application requirements and site conditions.
Tank Capacity: Determine the tank's capacity based on the storage requirements and estimated usage of LNG. The tank capacity should meet the anticipated storage duration and supply needs.
Material Selection: LNG tanks typically use low-temperature steel or nickel alloy materials to ensure corrosion resistance and strength in low-temperature environments. Select appropriate materials based on the tank's design pressure and temperature requirements.
Safety Performance: LNG tanks should have excellent safety performance, including seismic resistance, fire resistance, and leak control capabilities. The tanks must comply with relevant safety standards and regulations, such as API 620, EN 1473, etc.
Maintenance and Inspection: Consider the maintenance and inspection requirements of the tank, including internal cleaning, coating protection, and corrosion prevention measures. The tank design should facilitate maintenance and inspection operations to ensure long-term reliable operation.
Environmental Impact: When selecting LNG tanks, the impact on the surrounding environment must be considered. The layout and design of the tanks should comply with environmental protection requirements, minimizing noise, vibration, and gas emissions to reduce environmental impact.
Cost-effectiveness: Consider the investment, operational, and lifecycle costs of the tank, selecting one with a favorable cost-performance ratio.
需要注意的是，选型LNG储罐时应遵循相关的和地区的法规、标准和规范。此外，咨询的工程师或储罐制造商，以获取更详细和准确的选型建议。

Material control for low-temperature liquid storage tanks is a crucial aspect for ensuring safety and reliability. Here are some common material control measures:
Material Selection: Choose materials suitable for low-temperature environments, such as low-temperature alloy steel and stainless steel. These materials possess excellent low-temperature resistance and crack resistance, maintaining strength and toughness under低温 conditions.
Material Quality Control: Ensure the selected materials meet relevant standards and specifications. Conduct chemical composition analysis, mechanical property tests, and impact tests on the materials to ensure their performance meets design requirements.
Welding Material Selection: Choose welding materials suitable for low-temperature environments, such as low-temperature welding rods or welding wires. The welding materials should match the tank material, offering good welding properties and crack resistance.
Welding Process Control: Monitor welding process parameters such as current, voltage, and welding speed to ensure the quality and reliability of weld joints. Methods with low heat input, such as pulse welding and laser welding, can reduce the temperature gradient and residual stress in the heat-affected zone.
Corrosion Prevention Measures: Apply corrosion-resistant treatments to both the internal and external metal surfaces of the storage tank to extend its service life. Options include corrosion-resistant coatings and paints to protect the metal structure from corrosion damage.
Material Performance Monitoring: Regularly conduct performance monitoring of the storage tank materials, such as mechanical property tests,

Oxygen storage tanks and liquid oxygen storage tanks are used for storing oxygen, but they have some differences: - Storage form: Oxygen storage tanks are typically used for storing gaseous oxygen, while liquid oxygen storage tanks are for storing liquid oxygen. Oxygen is in a gaseous state at room temperature but is cooled to a liquid state at low temperatures for more efficient storage and use. - Storage pressure: Oxygen storage tanks usually store high-pressure oxygen, with pressures around 200-300 bar. Liquid oxygen storage tanks store liquid oxygen at lower pressures, typically around 2-5 bar. - Storage capacity: Oxygen storage tanks generally have smaller capacities, suitable for personal or small-scale use. Liquid oxygen storage tanks have larger capacities, suitable for industrial or large-scale use. - Storage method: Oxygen storage tanks store oxygen in a gaseous form, through compressed gas storage. Liquid oxygen storage tanks store oxygen in a liquid form, by cooling it to temperatures below its boiling point to convert it into a liquid. - Safety requirements: Due to the high oxidizing properties of liquid oxygen, liquid oxygen storage tanks require stricter safety requirements in design and use. Liquid oxygen storage tanks usually need to have good thermal insulation, leakage control, and fire prevention measures to ensure safe operation. - It should be noted that the specific design and specifications of oxygen storage tanks and liquid oxygen storage tanks may vary depending on different regions and application sites. When using these tanks, it is essential to follow applicable regulations, standards, and safety guidelines, and to cooperate with local regulatory authorities and personnel to ensure the safety and reliability of the tanks.
Shandong Zhongjie Special Equipment, welcome customers to visit our factory for business discussions.