Air gas has two separate bui8ldings and are not in the same business
group. The bottles are physically different and so are the people.
They supply oxygen to those who need it to simply breathe.

The coke trucks have their own supplies - different bottles.

You get medical CO2 blocks at one and industrial blocks at the normal.
When the medical unit gets a CO2 block set and doesn't use it -
they give it to the normal welding group. They done' ship hearts or
such - but shrink bearings or pipes or cause hail dimples to pucker and
flip back to flat.

So it depends on where you are and what companies and what is done.

Martin

On 1/9/2013 3:42 PM, Pete C. wrote:

Ignoramus8503 wrote:

On 2013-01-09, mike wrote:
On 1/8/2013 4:59 PM, Pete C. wrote:

Erik wrote:

For the record, there are different grades of O2 as well.... welding,
medical& aviators breathing Oxygen.

Yes, no, maybe...

The reality is there are different labels, but all are filled from the
same cryo tank and thus the medical and aviator grades have the same
higher purity of the welding grade even if the label lists the lower
standards of medical or aviator grades. Only the analytical grade gets
special treatment. This may well not have been true in decades past, but
today what's in the cryo tank is ultra pure and meets all the standards.

Wouldn't be hard to convince me that it's true.
But that's only part of the equation.

We don't have many unicorns and rainbows where I live.
In my world, I'd like my beverage CO2 supplier to have at the least
the facade of proper handling for food-grade stuff.

This will never be an issue for CO2...until it is.
Be as macho as YOU like.

The gas may be the same, but food grade also implies better handling,
for example, the hoses would not be lying in oil and dirt etc.

i

Implies, but not really. If you've seen the fill plants, all the fill
whips hang down from overhead manifolds and their connections can't
actually reach the floor. Those plants tend to be very clean anyway,
since regardless of grade, pure O2 contacting stray grease on fittings
does bad things.