The high-purity helium gas we use usually needs to comply with national standards, which is the national standard for high-purity helium gas. According to different times and actual market conditions, the content of the national standard for high-purity helium gas is constantly adjusting. The latest national standard for high-purity helium gas is GB/T4844-2011.
Helium, high-purity helium
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The new version of the national standard for high-purity helium gas was drafted and released on December 30, 2011, after years of research and observation by gas standard experts nationwide. The specific implementation date is from October 1, 2012. After studying the national content of new and old high-purity helium gas for several years, the editor deeply feels that product quality control is very important! One of the two most concerning issues for customers who purchase high-purity helium gas is the quality of the product. Some unscrupulous merchants sell 99.9% high-purity helium gas as 99.99% or even 99.999% pure high-purity helium gas. It should be noted that the price difference between high-purity and high-purity helium gas is very significant! Moreover, the use of high-purity helium gas products that cannot achieve purity is likely to affect the user's experimental results, product quality, or equipment production.
In fact, the national standard for high-purity helium gas was released as early as 1984, but for a long time, almost all of China's high-purity helium gas has been imported, so we have been using foreign standards for a long time. However, after more than ten years of practical application and combined with the actual situation in China, the Ministry of Chemical Industry reorganized and revised the national standard for high-purity helium gas in 1995, dividing the standard into high-purity and high-purity helium gas GB/T4844.1-1995; Pure helium GB/T4844.2-1995; High purity helium GB/T4844.3-1995. With the rapid increase in the demand for high-purity helium gas in China's high-end scientific research industry, the country adjusted the standards again in 2010, merging and revising the standards for pure helium and high-purity helium. Nowadays, various high-tech industries with high technological content such as low-temperature physics laboratories are flourishing in China, and high-purity helium cannot meet all the needs. Therefore, the new release of the national standard for high-purity helium has added content on high-purity helium and liquid helium.
The boiling point of high-purity helium is very low, making it difficult to liquefy it. Therefore, liquid helium is also a superior refrigerant, and many university experiments require the use of liquid high-purity helium. However, according to previous standards, there is no clear national regulation for liquid high-purity helium gas, so in practical operation, each laboratory has different standards, which inevitably makes it difficult for manufacturers and users to refer to. After the release of the new version of the national standard for high-purity helium gas, there are regulations for both high-purity helium and liquid helium, indicating that liquid helium does not need to be tested for moisture content, which has provided a clear direction for high-purity helium gas producers and users.
In addition, the new version of the national standard for high-purity helium gas has revised the technical requirements, purity testing standards, and testing standards for high-purity helium gas. At the same time, new requirements have been put forward for the packaging, transportation, and storage of high-purity helium gas, making the market for high-purity helium gas products more scientific, standardized, and operated more reasonably.
Wuhan Yisi Tuopu Technology Co., Ltd. has a high-purity helium gas purity of 99.9999%, which has been widely welcomed and recommended by major university laboratories since its supply. It fully meets the requirements of the latest high-purity helium gas national standard, and customers can use it with confidence! The latest price trend of high-purity helium and the most thoughtful gas consultation, come to Wuhan Yisi Tuopu Technology Co., Ltd!
