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https://www.bocgases.ie/files/balloon_grade_helium_factsheet.pdf https://www.bocgases.ie/files/balloon_grade_helium_factsheet... says 95% helium and 1% oxygen w

by icwtyjj 6mo ago

https://www.bocgases.ie/files/balloon_grade_helium_factsheet.pdf https://www.bocgases.ie/files/balloon_grade_helium_factsheet... says 95% helium and 1% oxygen while https://dan.org/alert-diver/article/helium-gas-purity-what-is-pure-enough/ https://dan.org/alert-diver/article/helium-gas-purity-what-i... says 97.5% helium but very unlikely for it to be as low as 80%

bee_rider 6mo ago
I wonder if one of you could be going by number of atoms, and the other could be going by weight?
inaros 6mo ago
"An overview of the different common grades of helium" - https://zephyrsolutions.com/what-are-the-different-grades-of-helium-and-what-are-they-used-for/ https://zephyrsolutions.com/what-are-the-different-grades-of... Grade 6 (6.0 helium = 99.9999% purity) The closest to 100% pure helium, 6.0 helium is used in the manufacturing of semiconductor chips – Grade 5.5 (5.5 helium = (99.9995% purity) Like 6.0 helium, 5.5 ultra pure helium gas is typically considered “research grade,” also used in chromatography and semiconductor processing Grade 5 (5.0 helium = 99.999% purity) This high purity grade helium is also widely used for gas chromatography, mass spectrometry, and specific laboratory research when higher purity gases are not necessary, as well as for weather balloons and blimps. Grade 4.8 (4.8 helium = 99.998% purity) The highest of the “industrial grade” heliums, 4.8 grade helium is often used by the military. The rest is classified... Grade 4.7 (4.7 helium = 99.997% purity) A “Grade-A” industrial helium, 99.997% helium is mostly used in cryogenic applications and for pressurizing and purging Grade 4.6 (4.6 helium = 99.996% purity) Grade 4.6 industrial helium is used for weather balloons, blimps, in leak detection Grade 4.5 (4.5 helium = 99.995% purity) Often the grade most commonly referred to when people say “industrial grade,” 99.995% helium is most commonly used in the balloon industry Grade 4 (4.0 helium and lower = 99.99% purity) Any helium that is 99.99% and down into the high 80 percents is within the range of purities referred to collectively as “balloon grade helium.”
- deceptionatd 6mo ago
  Interesting bit from that article wrt to transport infrastructure: "most distributors simply stick to the industry standard transport of Grade 5. That is why for and [sic] end user of helium, a lower grade can cost more than the higher grades."
HPsquared 6mo ago
Helium for diving is going to be a different mix than what's used for balloons. In diving it's used to reduce the partial pressure of oxygen, and also to quickly diffuse back out of tissues when returning to the surface. Very different application!
- icwtyjj 6mo ago
  Sorry i was referencing "Balloon grade H is the least pure at 97.5 percent." from the diving article
  - deleted 6mo ago
    [deleted]

by icwtyjj 6mo ago

bee_rider 6mo ago

I wonder if one of you could be going by number of atoms, and the other could be going by weight?

inaros 6mo ago

"An overview of the different common grades of helium" - https://zephyrsolutions.com/what-are-the-different-grades-of-helium-and-what-are-they-used-for/ https://zephyrsolutions.com/what-are-the-different-grades-of... Grade 6 (6.0 helium = 99.9999% purity) The closest to 100% pure helium, 6.0 helium is used in the manufacturing of semiconductor chips – Grade 5.5 (5.5 helium = (99.9995% purity) Like 6.0 helium, 5.5 ultra pure helium gas is typically considered “research grade,” also used in chromatography and semiconductor processing Grade 5 (5.0 helium = 99.999% purity) This high purity grade helium is also widely used for gas chromatography, mass spectrometry, and specific laboratory research when higher purity gases are not necessary, as well as for weather balloons and blimps. Grade 4.8 (4.8 helium = 99.998% purity) The highest of the “industrial grade” heliums, 4.8 grade helium is often used by the military. The rest is classified... Grade 4.7 (4.7 helium = 99.997% purity) A “Grade-A” industrial helium, 99.997% helium is mostly used in cryogenic applications and for pressurizing and purging Grade 4.6 (4.6 helium = 99.996% purity) Grade 4.6 industrial helium is used for weather balloons, blimps, in leak detection Grade 4.5 (4.5 helium = 99.995% purity) Often the grade most commonly referred to when people say “industrial grade,” 99.995% helium is most commonly used in the balloon industry Grade 4 (4.0 helium and lower = 99.99% purity) Any helium that is 99.99% and down into the high 80 percents is within the range of purities referred to collectively as “balloon grade helium.”

deceptionatd 6mo ago
Interesting bit from that article wrt to transport infrastructure: "most distributors simply stick to the industry standard transport of Grade 5. That is why for and [sic] end user of helium, a lower grade can cost more than the higher grades."

HPsquared 6mo ago

Helium for diving is going to be a different mix than what's used for balloons. In diving it's used to reduce the partial pressure of oxygen, and also to quickly diffuse back out of tissues when returning to the surface. Very different application!

icwtyjj 6mo ago
Sorry i was referencing "Balloon grade H is the least pure at 97.5 percent." from the diving article
- deleted 6mo ago
  [deleted]