Using filler metal for fill or cap

[nkvon]

Dear Sirs,
I have weld pipe joint with thickness 7.11 mm, I use WPS (GTAW+SMAW) with SMAW (3.2 filler dia for fill and 4.0 for cap). Because thickness not much so we only 3 layers (root, hot and cap) can I use 3.2 for cap instead use 4.0 filler dia as WPS,
Thanks so much

 

[weldstan]

Per ASME IX, Yes.

 

[nkvon]

Thanks for quick respond, weldstan. But this case, Do I need revise WPS or not, because follow code when nonessential change must revise follow that. Thanks,