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Apprentice Q&A · #113

What is the proper welding procedure (MIG vs. TIG) for 16-gauge stainless steel duct?

3rd YearSpecialty DuctRED · Stop / Verify

TIG (GTAW): Preferred for high-end visible commercial kitchen layouts because it provides ultimate control, ultra-clean welds, and minimal distortion on thin 16-gauge stainless steel using an argon gas shield.

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Plain-English answer

TIG (GTAW): Preferred for high-end visible commercial kitchen layouts because it provides ultimate control, ultra-clean welds, and minimal distortion on thin 16-gauge stainless steel using an argon gas shield.

MIG (GMAW): Used for faster production speeds on long commercial runs using a matching stainless wire and a 98% Argon / 2% CO 2 gas mix.

Rule: All welds must be continuous, external liquid-tight welds creating a seamless structural bond.

Field checklist

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Hey boss, I’m on specialty duct and need verification before I touch this: What is the proper welding procedure (MIG vs. TIG) for 16-gauge stainless steel duct? Do you want me to stop here and check the approved detail, submittal, or inspector/manufacturer requirement first?

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Use this as training guidance. The foreman, approved drawings, project specs, manufacturer installation instructions, employer safety policy, and AHJ/code requirements always control the final answer.

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