Combination of WPS as per AWS D1.1

[Vishal Chakote]

Dear Experts,
We have qualified WPSs as below:
1. GTAW + SAW
2. FCAW + SAW (with ceramic backing)
3. GMAW (RMD)+FCAW (self shield)

Can we combine WPS no 3 for root and hot pass with any of WPS no 1&2 for filling and capping?
Considering all essential variables are satisfying.
Construction code : AWS D1.1

Please give suggestions

[Prashant Panchal]

Yes

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[Kannayeram Gnanapandithan]

Where it is given in code for combination. Could you please give ref 

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[Mohan]

Hi,

If your are proceeding pipe welding always preferable root pass by GTAW. Some of customers / end user will not allow root pass by either GMAW / FCAW. 

Regards

G.Mohanraj

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