wps questions

[bhart192]

we have a WPS P8-P8 , did all testing required (tensile, bends etc). question , based on QW 432.1 it is my understanding that we can test welders under this WPS using P1-P8 ,P8-P44 coupons , if the coupon test pass (RT) then the welder is qualified to weld any combination of these P1-p11,P34,P41 thru P49 . what say you folks.

 

[weldtek]

QW423.1 allows alternate base metals to be used for qualifying welders, but, you need to review QW350 for essential variables applicable to welder qualification.

 

[stanweld]

In addition to the P Nos, you must also review the filler metals; e.g., assuming your WPS used an F6, A-8, welding filler metal. Your welder was qualifed on P No.1 coupons with E/ER309 filler metal. He may not weld P4X materials using F4X filler metals.

 

[bhart192]

I agree you would have to follow the essential veriables of the orginal WPS but you would not have to created another WPS thanks guys

 

[weldtek]

bhart,
There are separate essential variables applicable to the qualification of welders that must be adhered to. These have nothing to do with the essential variables for a WPS.
See QW350.

 

[Duwe6]

In other words, the broad variables you first quoted *just* apply to welder qualification -- Performance -- testing.

You are still required to have a WPS -- Procedure -- qualified to the appropriate Essential Variables. Those variables are much, much narrower.