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Up Topic American Welding Society Services / Certifications / changing shielding gases
- - By bigdaddy8406 Date 03-04-2008 21:06
We are considering changing shielding gases from a Helium tri-mix to a Argon/N2/Co2 mix for welding root passes in stainless pipe in the 1GR position. We weld to ASME section 9 codes. We have had some heated discussions whether we need to re-qualify are procedure. Does anyone know the code implications?
Parent - - By motgar (**) Date 03-04-2008 21:48
ASME Section IX:2007

QW-408.2
(c) a change in the specified percentage of a shielding gas mixture

Essential variable for GMAW, FCAW and GTAW
Parent - - By js55 (*****) Date 03-04-2008 22:17
Not sure what would create a heated discussion. As motgar posted its pretty explicit.
Parent - By Stringer (***) Date 03-05-2008 04:30
Essential variable. Check.
Up Topic American Welding Society Services / Certifications / changing shielding gases

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