On Sun, 3 Feb 2019 13:05:33 -0400
Leon Fisk wrote:

Higher flow rates can cause turbulence and possible bad coverage. When
I was doing a lot of welding for my Dad on a couple products. I would
run 8 CFH with 75/25 gas. No reason to run 30 when 8 would make
perfectly good welds.

Dang! Thinking about this later on and I'm sure that should have been
12 CFH and not 8. So anywhere you see 8 just pretend it is really 12
okay

A lot depends on what you're welding too. Laying into a corner filet or
inside some small area will take a lot less gas flow than something
flat, vertical, on-edge... you get the idea. Argon is heavier than air
and will tend to settle and fill contained areas...

--
Leon Fisk
Grand Rapids MI