For what you are talking about I agree with Lawrence 100%. Even in D1.1 process means process and that is the only criteria for welder continuity. If they use the process they are good.
From the beginning I defined process as those separate operational methods describing various welding methods: GTAW, GMAW, SMAW, etc. Process has nothing to do with the balance of the variables.
Within the codes I do not see such application. Thus far in my search the only thing I find is toward my reference to Job Specifications which has nothing to do with codes. If a customer wants welders qualified within certain parameters they may so specify. But the code only says they must use the process within each 6 month period. I said I would look more and I have been. I agree with Lawrence on this one.
Even pushing the boundaries with my question: certify to one code, use the process per another code, are you still qualified; according to the codes, yes. Does that mean it is the best? No. But it is the application.
So, if I qualify to D1.1 GTAW (which is not pre-approved) and only use it on alum to D1.2 over the course of a year, I have used the process and my original qualification is still intact. That's the way I am seeing it. I'm still checking some wording out but that's how it looks at present.
Customers and employers can make their own requirements that are more strict than the codes but as far as the minimum code standards go there is not an issue. And, I gather from Lawrence's stance on D17 that it is even clearer. (He should know, he is more involved with D17 than most realize)
Don't twist anything within my questions and attempts to clarify something in my own mind to make a stand that isn't intended by the codes. I am not an official interpretation; just an opinion.
There are many things we as members of this forum disagree on. Often, because we read or remember something wrong. We usually really mess up when going from our memories without a book in front of us. I already stated I had not read D17, probably wouldn't understand most of it even if I did. Not an area I am familiar with.
Well, with that said, you have a choice to make. But, don't hang your hat on what you think I said, or at least on what you think I meant by what I said. Base it on the code only. If there is still a question in your mind, send off for a technical interpretation and get the official viewpoint.
Have a Great Day, Brent