Shandong Zhongjie Special Equipment's main products include: fuel (gas) boilers, organic heat carrier boilers, biomass boilers, waste heat boilers, and other boiler products; vacuum insulation cryogenic pressure vessels such as LNG tanks, oxygen/nitrogen/argon tanks, and CO2 tanks; pressure vessel products such as denitrification engineering equipment, heat storage and energy storage equipment, and complete chemical equipment; central air conditioning and HVAC equipment such as ground (water) source heat pumps, air source units, water-cooled screw units, and air-cooled modular units. Planned products include large-scale energy centers, LNG transport vehicles, LNG tank containers, and other green energy equipment.
Maintenance and protection of liquid argon tank accessories are crucial for ensuring the normal operation and extending the service life of the tank. The following are general methods for maintaining and protecting liquid argon tank accessories:
Valve Maintenance: Regularly inspect and maintain valves within the tank accessories, including intake valves, exhaust valves, and safety valves. Ensure valves operate smoothly and reliably with no leaks or jamming. Regularly lubricate the valves and clean any debris and dirt.
Pressure Relief Device Maintenance: The pressure relief devices (such as safety valves) in the liquid argon storage tank accessories are critical components ensuring the safety of internal tank pressure. Regularly inspect and test the operational status of the pressure relief devices to ensure proper functioning. Clean and repair as needed.
Sensor and gauge maintenance: Sensors and gauges in the liquid argon storage tank accessories are used to monitor and control parameters such as tank temperature and pressure. Regularly calibrate and inspect the accuracy and reliability of the sensors and gauges. Keep the sensors and gauges clean and functioning properly.
Insulation Protection: The insulation layer of liquid argon storage tank accessories is crucial for maintaining the low temperature state of liquid argon. Regularly inspect the integrity and insulation performance of the insulation layer, and repair or replace damaged insulation materials. Avoid mechanical damage or contamination to the insulation layer.
Cleaning and Anticorrosion Protection: Regularly clean the accessories of the tank, removing impurities and dirt from the surface. Periodically inspect and maintain the anticorrosion coating of the accessories to prevent corrosion and oxidation.
Regular inspections and maintenance: Conduct comprehensive inspections and maintenance of liquid argon cylinder accessories on a regular basis, including the exterior, fittings, and seals. Promptly identify and address any damage, leaks, or other issues with the accessories.
Record and Document Management: Record the results of each maintenance and service, including the maintenance date, services performed, issues found, and measures taken. Establish comprehensive management records and documents for tracking and managing the operation of the attachments.
Please note that the maintenance and protection of liquid argon cylinder accessories should be carried out by trained personnel, following relevant specifications and standards. Ensure safety during maintenance and operation, and consult with experts for accurate guidance.

Daily inspections and maintenance of liquid oxygen storage tanks are crucial for ensuring their safe operation. The following are general steps for the daily inspections and maintenance of liquid oxygen storage tanks:
Appearance Inspection: Regularly inspect the exterior of the tank, including the shell, welds, valves, and fasteners. Pay attention to any abnormalities such as cracks, corrosion, or deformation.
Leak Detection: Utilize appropriate leak detection equipment to inspect for leaks in tanks and connection points. Leak detection can be conducted using methods such as gas detectors or liquid oxygen detection agents.
Pressure Testing: Regularly conduct pressure tests to check the tank's sealing and pressure resistance. Perform pressure tests in accordance with relevant standards and regulations, and record the test results.
Valve and Fitting Inspection: Verify that the valves and fittings on the tank are functioning properly and are not loose or damaged. Ensure the valves operate smoothly and are reliable.
Insulation Layer Inspection: Check for any damage or detachment in the tank's insulation layer. Repair or replace any damaged insulation materials to ensure effective insulation.
Cleaning and Drainage: Regularly clean the interior of the tank to remove accumulated impurities and dirt. Regularly drain to prevent the impurities and sediments in liquid oxygen from damaging the tank.
Safety Equipment Inspection: Examine the safety equipment around the storage tank, such as fire isolation zones, alarm systems, etc., to ensure they are functioning properly.
Record and Document Management: Document the results of each inspection and maintenance, including the inspection date, contents, issues found, and corrective measures. Establish comprehensive management records and documents for tracking and managing the storage tank's operation.
Note that inspections and maintenance of liquid oxygen tanks should be conducted by trained personnel and in accordance with relevant regulations and standards. Ensure safety during maintenance and operations, and consult experts for accurate guidance.

Potential causes of leakage in liquid argon storage tanks may include:
Design or Manufacturing Defects: Defects in the design or manufacturing process of the tank, such as loose welds, improper material selection, and poor sealing, lead to leakage issues in the tank.
Corrosion and Oxidation: Long-term exposure of liquid argon tanks to low temperatures can lead to corrosion and oxidation. These can damage the tank's surface protective layer, causing leakage issues.
Fatigue and stress cracking: Over time, due to temperature and pressure fluctuations, storage tanks may experience fatigue and stress cracking. These cracks can degrade the tank's sealing performance, leading to leaks.
Improper Operation: Failure to follow proper procedures during the storage tank operation, such as overfilling with liquid argon or excessive pressure, can lead to tank damage and leakage.
External Damage: The storage tank may have been damaged by external factors, such as mechanical impact or objects

Routine inspections of liquid nitrogen tanks should include the following aspects:
Level Inspection: Regularly check the liquid nitrogen tank's level to ensure it remains within the normal range. Inspections can be conducted using level gauges or level scales.
Pressure Check: Inspect the tank's pressure to ensure it is within the safe range. Pressure gauges or pressure sensors can be used for the inspection.
Insulation Layer Inspection: Verify that the storage 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.
Leakage Inspection: Check for signs of liquid nitrogen leakage around the tank, such as evaporated mist, frost, or freezing. If a leak is detected, take prompt measures to repair it.
Valve and Pipeline Inspection: Verify that the valves and pipelines of the storage tank are functioning properly without any gas leaks or blockages. Ensure the tightness and unobstructed flow of the valves and pipelines.
Safety Device Inspection: Examine the storage tank's safety devices, such as pressure relief valves, temperature sensors, and liquid level alarms, to ensure they are functioning properly.
External Tank Cleaning: Regularly clean the exterior surfaces of the tank to remove dust, grime, and debris. Maintain a clean appearance for the tank, and facilitate easy inspection and maintenance.
Documentation: Timely record the inspection results and maintenance records of the tanks, including level, pressure, insulating layer condition, and leakage status. These records aid in monitoring the tank's operational status and promptly identifying issues.
Above is the daily inspection content for liquid nitrogen storage tanks. Regularly conducting these checks ensures the safe operation and efficient use of the tank. At the same time, follow relevant safety regulations and operational guidelines to ensure the safety of personnel and equipment.
Our company places great importance on technological innovation and R&D design. We have one city-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 instruments and 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 welding for temperature and pressure vessels, emissions reduction for biomass boilers, and waste heat utilization, have successively been shortlisted 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 a total of 27 authorized utility models, 16 authorized inventions, participated in drafting 2 standards, 2 industry standards, and registered 15 trademarks. The technical team of our company, in collaboration with Professor Li Yajiang of Shandong University, has developed deep cryogenic container processing technology, utilizing the international plasma arc + filler wire tungsten inert gas arc welding (PAW-GTAW) technology. The provincial-level scientific and technological achievement identification shows that 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!