Apprentice answer

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

3rd YearGrease Duct & Specialty ExhaustStop / 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

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

Stop and verify the approved detail, manufacturer instructions, foreman direction, and project specs before touching it.

Ask Foreman

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?

Verify before acting

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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