1" thickness pipe to be with notch toughness procedure.

[stan000]

we have to weld we have to weld 1" pipe with notch toughness procedure.
i do have welding procedure up to 3/4" weld.
can i used two welders with this procedures to weld 1" thick.
i do have welding procedure up to 3/4"thickness weld.
can i used two welders with this procedures to weld 1" thick pipe.
so first welder can weld 0.5" thick both side & other welder can weld remaining 0.5"weld.
please advice
stanly

 

[JStephen]

I assume you mean 1" thick pipe, not 1" (nominal size) pipe.
If the weld is 1" thick, it's 1" thick, and you can't just treat it as two welds 1/2" thick.
Having two different people weld on it is not a problem, but it's still one thick weld, not two thin welds.
The various welding codes will specify how thick the weld (or material) can be, based on the thickness used in the weld qualification and in the welder certification tests.

 

[Mr168]

No. The WPS prescribes the limitations of the weld deposit, not the welder qualifications. You can have as many welders as you want on a given joint, but if the procedure is only qualified to 3/4", the sum of their deposits may not exceed that thickness. The qualified WPS base metal/deposit thicknesses remain the limiting factor.

 

[weldstan]

You will need to requalify a procedure to meet the maximum thickness of 1 inch as a minimum. If your governing Code is B31.3, you would need to qualify for impact testing on 3/4" thick material as a minimum. You could then use two welders or more to make production welds provided they have been properly qualified per ASME IX.