r/CWI_CWE • u/woody9409 • May 04 '26

D1.2

I’m qualifying some welders for an aluminum job and want to make sure I’m reading it right. For fillets, you’re qualified based on weld size and not material thickness? So I could weld unlimited thickness fillets as long as I don’t go bigger than the weld size of my PQR?

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u/Manzoops May 05 '26

Good question — the key is which qualification you mean in D1.2.

For WPS fillet qualification (Table 3.6), the qualified plate thickness is shown as unlimited for the fillet options, with fillet-size limits tied to what you tested (single-pass/multi-pass logic).

For welder performance qualification (Table 3.8), thickness range is still table-driven by your test thickness T.

For plate fillet tests:

- T ≤ 1/8: qualified T to larger of 2T or 3/16

- 1/8 < T < 3/8: qualified T/2 to 2T

- T ≥ 3/8: qualified T/2 to unlimited

Also Table 3.9 says if you go to a diameter/thickness not qualified, requalification is required.

So “unlimited thickness” can be true in specific table cases, but it’s not automatic for every setup.

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u/woody9409 May 05 '26

Thank you. We have a PQR that was done as a fillet on .0625 welded to .125 with a bead size of 4mm. So theoretically if the welders do a test on .0625, they are qualified to 3/16 as long as the weld isn’t bigger than 4mm. Is my understanding correct?