Shandong Zhongjie Special Equipment (formerly Heze Boiler Factory Co., Ltd.) was established in 2001, located at No. 2218 Jinnan Road, 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-freezing containers, pressure vessels, central air conditioning, engineering installation, international trade, and Internet of Things. It has three manufacturing 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. Currently, there are 710 employees, including 247 engineering and technical personnel 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 recognized as a "Gazelle Enterprise in Shandong Province" and in August 2022, it was identified as a "Specialized and New Small Giant Enterprise" by the Ministry of Industry and Information Technology.
Safe operation of low-temperature liquid storage tanks is primarily crucial in the following 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 suitable materials, such as stainless steel, aluminum alloys, 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 effective insulation to minimize heat transfer and evaporation of the liquid. The selection and installation of the insulation 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 valve to ensure that the pressure inside 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 safety 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. Tanks and related pipelines should have good sealing and be regularly inspected and maintained to prevent leaks. Additionally, appropriate fire protection equipment and firefighting tools should be provided to mitigate fire risks.
Safety Operation and Training: Operators must undergo relevant safety training, familiarize themselves with the safety operating procedures and emergency response measures for low-temperature liquid storage tanks. Adhere to correct operational steps to ensure safe operation.
Regular inspections and

Daily inspection of liquid nitrogen tanks primarily includes 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: Verify the sealing performance of the tank, including checking for leaks at valve and pipeline connections, and ensuring the exhaust valve and safety valve of the tank are functioning properly.
Pressure Check: Verify that the storage tank's pressure gauge is functioning correctly and that the pressure is within the normal range to ensure the tank operates properly.
Level Check: Inspect the liquid nitrogen tank's level to ensure it's within the normal range, avoiding issues caused by levels that are too high or too low.
Insulation Layer Inspection: Verify the integrity of the tank's insulation, checking for any damage or detachment to ensure optimal insulation performance and reduce evaporation losses of liquid nitrogen.
Leakage Inspection: Check for signs of liquid nitrogen leakage around the storage tank, including any frost, ice, or liquid nitrogen residue on the ground.
Safety Equipment Inspection: Verify that the safety equipment of the storage tank, such as leak detectors, alarm systems, and safety valves, is functioning properly to ensure the tank's safety.
Cleaning 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 routine inspection items for liquid nitrogen tanks. The specific inspection items should be adjusted and supplemented based on the tank's model, usage, and relevant regulations. During the inspection process, strictly adhere to the operational procedures and safety requirements to ensure the safe operation of the tank.

The maintenance and protection of liquid argon cylinder accessories are crucial for ensuring the normal operation and extending the service life of the cylinder. The following are general methods for the maintenance and protection of liquid argon cylinder accessories:
Valve Maintenance: Regularly inspect and maintain valves within tank accessories, including intake valves, exhaust valves, and safety valves. Ensure valves operate smoothly and reliably, without leaks or sticking. Regularly lubricate valves and remove any debris and dirt.
Pressure Relief Device Maintenance: The pressure relief devices (such as safety valves) in the accessories of liquid argon storage tanks are critical components for 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 Instrument Maintenance: Sensors and instruments in the liquid argon storage tank accessories are used to monitor and control parameters such as the tank's temperature and pressure. Regularly calibrate and inspect the accuracy and reliability of the sensors and instruments. Keep the sensors and instruments clean and functioning properly.
Insulation Layer Protection: The insulation layer on liquid argon storage tank accessories is crucial for maintaining the low temperature state of the liquid argon. Regularly inspect the integrity and insulation performance of the insulation layer, and repair or replace any damaged insulation material. Avoid mechanical damage or contamination to the insulation layer.
Cleaning and Corrosion Protection: Regularly clean the accessories of the tank, removing impurities and dirt from the surface. Conduct regular inspections and maintenance of the corrosion protection layer on 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: Document each maintenance and service result, including the service date, content, identified issues, and corrective measures. Establish comprehensive management records and documents for tracking and managing the operation of the attachments.
Note that maintenance and protection of liquid argon cylinder accessories should be performed by trained personnel and in accordance with relevant specifications and standards. Ensure safety during maintenance and operation, and consult experts for accurate guidance.

Daily 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. This can be done using level gauges or level scales, among other equipment.
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: Check if the tank's insulation layer is intact without any 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 leakage is detected, take immediate measures to repair it.
Valve and pipeline inspection: Verify that the valves and pipelines of the storage tank are functioning properly without any leaks or blockages. Ensure the tightness and unobstructed flow of the valves and pipelines.
Safety Device Inspection: Check the storage tank's safety devices, 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, leakage conditions, etc. These records aid in monitoring the tank's operational status and in identifying issues promptly.
The above details the routine inspection procedures for liquid nitrogen tanks. Regularly conducting these checks ensures the safe operation and efficient use of the tanks. Additionally, adhere to relevant safety regulations and operational guidelines to ensure the safety of personnel and equipment.
Shandong Zhongjie Special Equipment, welcome customers to visit our factory for cooperation discussions.