Which welder do you actually need?
Welder requests often name the most qualified grade by default. A structural welder is the right request for steel frames, platforms, stairs, supports, skids and general fabrication, where welds are inspected visually and by occasional surface testing. Choose 3G when the work is plate welded in the vertical position under a qualification test. Choose 6G when pipe is welded in fixed positions and inspected by radiography, and TIG when the root or the material calls for it. Sending a 6G welder to structural work costs more without improving the weld.
