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Industry-Recognized Norms for Nitrogen Charging in High-Pressure Accumulators

The following is a comprehensive guide on the nitrogen filling standards for pressurized accumulators, covering multiple key aspects:
1、 Safety preparation
Safe area: Ensure that the filling area is away from ignition sources and flammable materials, and maintain good ventilation.
Personal protection: Operators should wear appropriate personal protective equipment, such as anti-static clothing, rubber gloves, etc.
2、 Inspection of nitrogen gas cylinders and equipment
Gas cylinder inspection: Check the integrity of the nitrogen gas cylinder to ensure that there are no leaks or damage.
Connecting pipes: Check the condition of the connecting pipes to ensure they are tightly connected and leak free.
Pressure gauge and safety valve: Check the integrity of the pressure gauge and safety valve to ensure their normal function.
3、 Filling process
Connection and adjustment:
Connect the nitrogen cylinder to the accumulator pressure system.
Gradually open the nitrogen cylinder valve and allow nitrogen to enter the connecting pipeline.
Use a pressure regulating valve or pressure gauge to adjust the pressure of nitrogen, usually within the range of 10-30 bar for nitrogen charging. The specific value depends on the design and application requirements of the accumulator.
Monitoring and recording:
Continuously monitor the changes in the pressure gauge to ensure that the pressure is stable and does not exceed the set maximum pressure.
Record the start and end times of filling, as well as the pressure values before and after filling.
4、 Safety precautions
Avoid leakage: During the filling process, avoid nitrogen leakage to ensure environmental safety.
Nitrogen hazard: Although nitrogen is non-toxic, it may cause suffocation at high concentrations. Therefore, avoid inhaling nitrogen for a long time.
Operating standards: Filling operators should receive professional training and be familiar with the operating methods and safety regulations of filling equipment.
5、 Completion and Inspection
Close the gas cylinder: After filling is completed, close the nitrogen cylinder valve and disconnect from the accumulator pressure system.
System check: Check the pressure gauge of the accumulator pressure system to ensure that the pressure is stable near the required holding value. If abnormal pressure or system leakage is found, immediate measures should be taken for handling.
6、 Maintenance and upkeep
Equipment maintenance: Regularly inspect and maintain the filling equipment to ensure it is in good condition.
Pressure gauge and safety valve: Regularly check the function of the pressure gauge and safety valve to ensure their normal operation.
7、 Special applications
Special pressure requirements: In certain special applications, such as semiconductor manufacturing or medical fields, higher nitrogen filling pressure may be required. In these cases, adjustments should be made according to specific application requirements.
Nitrogen purity: In some applications with strict requirements for nitrogen purity, it should be ensured that the purity of nitrogen used reaches 99.9% or higher.
Following the comprehensive guidance above can ensure the safe and effective nitrogen filling process of the pressurized accumulator, and meet specific application requirements.



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