The manufacturer specially supplies high-purity helium to Taiyuan, Yangquan, Linfen, Changzhi and Jincheng in Shanxi

规格：

40L

纯度：

99.999%

包装：

钢瓶

Subject content and scope of application
This standard specifies the technical requirements, inspection methods, inspection rules, product packaging, marking, storage and transportation of high-purity helium products.
This standard applies to bottled high-purity gaseous helium extracted from natural gas, air or factory vent gas by cryogenic method. It is mainly used for the preparation of standard mixed gases, low-temperature superconductivity, scientific research, chromatographic analysis carrier gas, etc.
Molecular formula:.
Relative molecular mass: (by year international relative atomic mass).
Reference standards
B／&.Industrial helium
B&.&Pure helium
B／&. Determination of trace moisture in gases by electrolysis
B／&gas Determination of carbon monoxide, carbon dioxide and methane in gas chromatography
B/& Preparation of mixed gas for gas analysis and calibration Weighing method
B/&& Preparation of standard mixed gas for gas analysis Static volume method
B/&&Measurement and comparison method of gas analysis standard mixed gas composition
Technical requirements
The quality of high-purity helium products should meet the requirements in the table below. The "purity" and "content" in the table are all volume fractions (/). &&. .
&Oxygen (argon) content,&&.
&Nitrogen content,&
&Carbon monoxide content,&&.&.&.
&Carbon dioxide content,&&.&.& .
&Methane content,&&.&.&.
&Moisture content,
&Test method
.Helium purity
&Helium purity is expressed in volume fraction , calculated according to the formula:
=(&+&+&+&+&+&+&+&)&&&&&
Formula: &&Helium purity, (／)
&&Neon content (volume fraction),/)
&&&Hydrogen content (volume fraction). (/)
& Oxygen (argon) content (volume fraction), (/)
&&Nitrogen content (volume fraction), (/).
&&Carbon monoxide content (volume fraction). (/)
&&Carbon dioxide content (volume fraction), (/)
&&Methane content (volume fraction), (/)
&&Moisture content (volume fraction), (/).
Henan Yuanzheng Gas specializes in supplying high-purity helium, ultra-pure helium, chromatographic helium, liquid helium, balloon helium, and related product technical standards
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< =>Product Description
Helium Helium is a colorless, tasteless, and odorless inert gas that is gaseous at room temperature. It has the lowest critical temperature and is the most difficult gas to liquefy found in nature. Helium is extremely inactive in chemical properties and cannot burn or support combustion. The content of helium in the air is about parts per million. In theory, it can be separated and extracted from the air, but because the content is too thin, the separation cost is very high. Industrial helium is mainly separated and refined from natural gas with a helium content of about .%~% in the United States, Russia, Algeria, and Qatar to obtain high-purity helium. After liquefaction, it is transported by sea and transported to all parts of the country. Taking advantage of the low boiling point of liquid helium, liquid helium can be used for ultra-low temperature cooling. Helium is indispensable in superconducting applications that have attracted much attention in areas such as levitating trains. In addition, because helium is chemically inactive and lighter than air, helium is often used as the filling gas in spacecraft or advertising balloons, and this use is also well-known. Helium is widely used in respiratory mixed gases in the field of ocean development, and in the cooling of superconducting electromagnets in MRI equipment in the medical field: military industry, scientific research, petrochemicals, refrigeration, medical care, semiconductors, pipelines Leak detection, superconducting experiments, metal manufacturing, deep-sea diving, high-precision welding, optoelectronic product production, etc.