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 electromechanical equipment installation contracting qualification. It is a member of the China Boiler and Water Treatment Association, the China Chemical Equipment Association, and the理事 unit 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.
Maintaining and being aware of the precautions for liquid nitrogen tanks is crucial; here are some key points:
Maintenance:
Regular Inspections: Conduct regular inspections of the liquid nitrogen tank's exterior, valves, pipes, and other components to ensure they are in perfect condition. Pay special attention to check for any leaks, corrosion, or other forms of damage.
Clean Storage Tanks: Regularly clean liquid nitrogen storage tanks to remove internal dirt and deposits. Use appropriate cleaning agents and tools, and follow the cleaning procedures and safety operation protocols.
Nitrogen Liquid Refill: Refill nitrogen liquid as needed on a regular basis. Ensure the storage tank maintains an adequate nitrogen liquid inventory to meet usage requirements.
Maintain Pressure: Regularly check the liquid nitrogen tank's pressure to ensure it remains within the safe range. Conduct pressure tests and adjustments as necessary.
Corrosion Prevention: Appropriate corrosion prevention measures are taken based on the material of the storage tank and its operating environment to extend the service life of the tank. For example, applying anti-corrosion coatings, conducting regular anti-corrosion treatments, etc.
Cautionary Notes:
Safe Operation: When using liquid nitrogen tanks, strict adherence to safety operating procedures and standards is mandatory. Operators must be trained, familiar with the properties of liquid nitrogen and safety operation requirements, and knowledgeable about the tank equipment and operational procedures.
Protection Measures: When using liquid nitrogen tanks, necessary protective measures must be taken, such as wearing protective gloves and suits. Avoid direct contact with liquid nitrogen to prevent coldness.
Leakage Control: Regularly inspect the liquid nitrogen tanks for leaks and equip them with leak detectors and alarm systems. In the event of a leak, immediate action should be taken to control the leak and carry out repairs.
Ventilation Requirements: In enclosed spaces where liquid nitrogen tanks are in use, adequate ventilation must be ensured.

When selecting a liquid oxygen storage tank with a medical oxygen concentrator, consider the following factors:
Requirement: First, determine the oxygen demand of the institution or individual. Select the appropriate oxygen concentrator model and specification based on the required oxygen flow rate and pressure.
Safety and Reliability: Ensure the selected oxygen concentrator has high levels of safety and reliability. Choose products that comply with relevant standards and regulations, featuring safety functions such as overpressure protection, leakage protection, and overload protection.
Ease of operation: Choose an oxygen concentrator that is simple to operate and user-friendly. Consider the methods for adjusting oxygen flow and concentration, as well as the clarity and readability of the operating interface.
Quality and Reputation: Choose oxygen generators with excellent quality and reliability. Refer to customer reviews, word-of-mouth, and certifications to select the right product.
Maintenance and After-Sales Service: Understand the maintenance requirements and after-sales support for the oxygenator. Ensure timely access to repairs and technical support to ensure the smooth operation and maintenance of the oxygenator.
Cost-Effective: When considering the price, performance, and features of the oxygenator, opt for a product with a favorable cost-performance ratio. Choose the appropriate oxygenator based on actual needs and budget.
Be mindful that when selecting a liquid oxygen tank with a medical oxygen generator, adhere to the relevant equipment procurement regulations and standards. It's advisable to consult with equipment suppliers or relevant institutions to ensure the oxygen generator chosen meets the requirements and safety standards.

Daily inspection contents for liquid nitrogen tanks mainly include the following aspects:
Appearance Inspection: Check for any obvious damage, deformation, or corrosion on the tank's exterior, including the tank walls, valves, pipes, and joints.
Sealability Inspection: Check the tank's sealing performance, including inspecting for leaks at valve and pipe connections, and verifying that the tank's exhaust valve and safety valve are functioning properly.
Pressure Check: Verify that the tank's pressure gauge is functioning properly and that the pressure is within the normal range to ensure the tank operates normally.
Level Check: Verify the liquid nitrogen tank's level to ensure it remains within the normal range, preventing issues caused by either excessive or insufficient levels.
Insulation Layer Inspection: Check for any damage or detachment in the storage tank's insulation layer to ensure proper insulation and reduce evaporation losses of liquid nitrogen.
Leak Inspection: Check for signs of liquid nitrogen leakage around the storage tank, including frost, ice, or liquid nitrogen stains on the ground.
Safety Equipment Inspection: Check that the storage tank's safety equipment, such as leak detectors, alarm systems, and safety valves, are functioning properly to ensure the tank's safety.
Clean Inspection: Regularly clean the interior of the tank to remove accumulated impurities and dirt, maintaining the tank's cleanliness and hygiene.
The above lists the daily inspection requirements for liquid nitrogen tanks. The specific inspection items should be adjusted and supplemented based on the tank's model, usage, and relevant standards. During the inspection, strict adherence to the operational procedures and safety requirements is essential to ensure the safe operation of the tank.

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 are in a gaseous state at room temperature but are cooled to a liquid state at low temperatures for easier storage and use. These storage tanks are typically made of high-strength materials like stainless steel or aluminum alloy to withstand the demands of low temperatures and high pressures. They usually have an insulating layer to reduce evaporation and maintain the low-temperature state. Applications of low-temperature liquid storage tanks include but are not limited to the following areas: They are widely used in spacecraft and rocket fuel and propulsion systems, such as liquid oxygen, liquid nitrogen, and liquid hydrogen storage tanks. They store and supply low-temperature liquids as fuel and oxidizers to propel spacecraft and rockets. 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, oxygen inhalation, and operating rooms. Laboratory Research: In scientific research and laboratories, low-temperature liquid storage tanks provide low-temperature liquids as coolants and cryogenic media. They are used for cooling laboratory equipment, material research, superconductivity, and low-temperature physics. In summary, low-temperature liquid storage tanks are widely used in various fields, including aerospace, industrial production, and laboratory research, for storing and supplying low-temperature liquids to meet the needs of different industries.
Our company highly values technological innovation and R&D design. We possess 1 municipal-level enterprise technology center in Heze City, equipped with non-destructive testing, physical and chemical testing, welding testing, hydrostatic testing, and other testing facilities. We have over 600 various equipment, including CNC machine tools, X-ray flaw detectors, digital ultrasonic flaw detectors, mechanical property testing machines, chemical analyzers, spectrometers, tensile testing machines, plasma welding machines, etc. The key products we have developed, such as temperature and pressure vessel welding, biomass boiler emission reduction, and waste heat utilization, have successively been selected for multiple Shandong Provincial Department of Industry and Information Technology Science and Technology Innovation projects, Shandong Provincial Key Projects, and Heze City Innovation and Excellence projects. We have accumulated 27 authorized utility model patents, 16 authorized invention patents, participated in drafting 2 standards, 2 industry standards, and registered 15 trademarks. Our technical team, in collaboration with Professor Yajiang Li from Shandong University, has jointly developed deep cryogenic container processing technology, utilizing the international plasma arc + wire filling tungsten inert gas arc welding (PAW-GTAW) technology. After provincial-level scientific and technological achievement evaluation, the technology level has reached an international standard in the field of deep cryogenic container manufacturing. Choose Zhongjie Special Equipment, and let's create brilliance together!