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Hi pjseaman!
If I remember correctly, the AWS process designation is: FCAW-G...
Reference; AWS A3.0:2001, page 18, 2nd column under "Gas shielded Flux Cored Arc Welding... Hence, FCAW-G.
"A flux cored arc welding process variation in which the shielding gas is supplied through the gas nozzle, in addition to that obtained from the flux within the electrode."
"Dual Shield" is a brand name originally from "Alloy Rods" but, I understand what you're trying to say by using the term "dual shield"...
Meaning that the weld metal is being shielded by both the flux core and the shielding gas.
Since this is the AWS BBS Grand Central, I thought it was necessary to clarify the actual and correct description of the process you were describing.
Please do not take offense of my comments.
Respectfully,
SSBN727 Run Silent... Run Deep!!!