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At 09:36 AM 1/7/00 -0500, MMikeodin@ao*.co* wrote:
>Hello List
>I bought a couple of 80cft.alu to use them as stages as they affect the
>axial trim less than steels if you have them on the left.
>If ´ve heared particulary from the ANDI corner that they may occur problems
>with
>Aluminum cylinders and high O2 content.
>Any recommendations -beside of course O2-clean&compatible?
>thank you
>Mike

The problem is aluminum particles rather than the clean, solid walls of a 
cylinder. There's been problems with alu parts in regulators. Fragments and 
shavings may ignite when exposed to a violent flow of oxygen. Alu is soft 
and brittle and is a poor choice for making parts for a first stage 
regulator. This is much less of a risk in a cylinder than inside a 
regulator and does in either case depend on fragments rather than on 
aluminum per se. A healthy, clean tank is safe, whether it's alu or steel.

regards,

Hans

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