Introduction to High-Purity Helium Filling Methods

Helium, High-Purity Helium, Helium Manufacturers, Helium Filling

High-purity helium filling requires professional personnel and must be strictly performed in accordance with gas filling process regulations and safety operating procedures. Gas filling operators must wear appropriate protective equipment. Before operation, they must check that the filling equipment, pipelines, valves, instruments, meters, and tools are complete, intact, safe, sensitive, and reliable. For high-purity helium, contact Wuhan Zhongxin Ruiyuan Gas Co., Ltd. Click for online inquiry or call our hotline: +86 189 8614 9031

2. Various gas cylinders, due to containing different working media and operating under pressure in various environments, will have changing safety conditions, even severe ones. To ensure safety, regular technical inspections and evaluations of all in-service gas cylinders must be strictly conducted according to the prescribed time and content. Before each filling, it must be confirmed that the high-purity helium cylinder to be filled has passed inspection.

3. Strengthen equipment maintenance; do not treat equipment merely as "usable." Due to compressor quality and maintenance issues, the quality of compressed air produced by this unit has long failed to meet standards. However, they have consistently focused on meeting gas pressure standards while neglecting gas quality. The oil-water separator and dryer have not been maintained or replaced for a long time, leading to decreased water and oil removal capabilities, accelerated cylinder corrosion, and creating potential future accidents.

4. Strengthen personnel training, organize technical backbones, especially experienced senior staff, to summarize lessons learned, continuously accumulate good working methods, and implement equipment operating procedures and safety regulations to avoid equipment damage or serious accidents caused by weak personnel skills or oversights during operation.

5. When operating valves, operators must stand to the side, proceed slowly, and open or close them fully in one go, but not too tightly, to avoid excessive frictional heat or static electricity generated by airflow impact, which could ignite or explode flammable or oxidizing gas cylinders. Excessive force can also damage valve threads.

6. From the start of high-purity helium filling, pressure changes should be monitored continuously. Before the pressure reaches 1/3 of the filling pressure, the operator should test the cylinder temperature, address any leaks, and promptly handle any abnormalities to ensure normal filling until completion. During inspection, if any cylinders are found to be not receiving gas (no temperature rise when touched) or leaking, they should be addressed immediately. If not receiving gas, check if the cylinder valve is open; if leaking, address the leak. However, if the pressure exceeds 10 MPa or it is inconvenient to handle, wait until the high-purity helium filling of that cylinder is complete, close the filling valve and cylinder valve, and disconnect the tubing before proceeding. In addition to touching the cylinder temperature, listen for any abnormal sounds inside the cylinder and check if the cylinder valve seal is good.

7. After filling, each bottled gas product should be inspected by a designated person. If any does not meet the requirements, it should be properly disposed of. The inspection includes: verifying that the measured pressure inside the cylinder is within the specified range; verifying that the purity of the gas inside the cylinder is within the specified range; verifying the sealing of the cylinder valve and its connection to the cylinder opening; checking for serious defects affecting safe use, such as bubbling or deformation, after filling; checking for abnormal temperature changes in the cylinder; verifying that all cylinder accessories are complete and conform to current standards; verifying that the product certificate is filled out correctly, clearly, and in accordance with regulations; and ensuring that each bottle of gas leaving the factory has a warning label.

8. Improve the ability to handle special situations during equipment operation. During the process of filling high-purity helium into cylinders, if the cylinder nozzle or valve catches fire or the cylinder temperature rises to a point where the cylinder wall becomes severely hot, immediately close the filling valve and cylinder valve, disconnect the tubing, quickly move the cylinder away from the work area, and then release all the gas inside the cylinder (but toxic or hazardous gases cannot be released directly; other effective measures must be taken to handle them).