[sudo-discuss] air compressor and plasma cutter

[Patrik D'haeseleer]

We should definitely disallow cutting of any stainless steel, which causes
dangerous hexavalent chromium dust. For those of you with the blank stares,
hex chromium is the pollutant linked to dozens of cancer cases in the Erin
Brokovich movie, a dramatized account of an infamous case where PG&E wound
up paying out a third of a billion dollars in damages.

We should probably ban any galvanized metals as well. Zinc fumes are nasty.
Nickel in stainless steel is a concern as well. So is the cadmium and
manganese in some grades of steel.

The upshot is that we probably shouldn't be doing any plasma cutting
without some serious ventilation. And eye protection of course - a welding
curtain or screen might be good to have.

Patrik

PS: We've been discussing the possibility of doing water testing for metal
contaminants in CCL. But having a plasma cutter spewing metal oxides into
the air on the other side of the room may very well make that impossible...

On Wed, Apr 27, 2016 at 2:26 AM, Marc Juul <juul at labitat.dk> wrote:

>
>
> On Wed, Apr 27, 2016 at 1:44 AM, Jake <jake at spaz.org> wrote:
>
>> BUMP
>>
>> we got the plasma cutter working!  But the air compressor is still messed
>> up.  We took it apart three times trying to fix the check valve, but it
>> simply didn't work.
>>
>
> I love plasma cutters but how are we going to safely use one indoors? I'm
> not sure anyone wants to breathe clouds of metal oxides:
>
>
> http://www.hgcodedwelding.com/hg-coded-welding-blogs/plasma-cutting-danger
>
> --
> marc/juul
>
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