http://www.theoxygencafe.com/oxygen-cylinders/why-is-helium-used-in-oxygen-cylinders-instead-of-nitrogen Tue, 13 Jul 2010 18:48:59 +0000 http://wordpress.org/?v=2.9.1 hourly 1 http://www.theoxygencafe.com/oxygen-cylinders/why-is-helium-used-in-oxygen-cylinders-instead-of-nitrogen/comment-page-1#comment-591 oeman50 Fri, 05 Mar 2010 12:09:59 +0000 http://www.theoxygencafe.com/oxygen-cylinders/why-is-helium-used-in-oxygen-cylinders-instead-of-nitrogen#comment-591 It depends on the use of the oxygen cylinders. Most cylinders of oxygen used for underwater or pressurized breathing air have nitrogen, but pressurized nitrogen will dissolve in the blood stream and come back out of solution when the pressure decreases rapidly, causing what is known at the "bends" unless the ascent is made slowly. So some breathing mixtures will use helium instead of nitrogen to prevent this.<br><b>References : </b><br> It depends on the use of the oxygen cylinders. Most cylinders of oxygen used for underwater or pressurized breathing air have nitrogen, but pressurized nitrogen will dissolve in the blood stream and come back out of solution when the pressure decreases rapidly, causing what is known at the "bends" unless the ascent is made slowly. So some breathing mixtures will use helium instead of nitrogen to prevent this.
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]]> http://www.theoxygencafe.com/oxygen-cylinders/why-is-helium-used-in-oxygen-cylinders-instead-of-nitrogen/comment-page-1#comment-590 softwarejonas Fri, 05 Mar 2010 11:35:59 +0000 http://www.theoxygencafe.com/oxygen-cylinders/why-is-helium-used-in-oxygen-cylinders-instead-of-nitrogen#comment-590 I guess Helium is a noble gas and not likely to react with anything, while Nitrogen can react with many elements.<br><b>References : </b><br> I guess Helium is a noble gas and not likely to react with anything, while Nitrogen can react with many elements.
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